diff options
| author | Jinke Han <jinkehan@didiglobal.com> | 2026-09-08 15:37:42 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2026-09-17 09:48:42 +0200 |
| commit | a5f7a5bb3b7f28ba7e4fa246775b29a0e5537255 (patch) | |
| tree | 73fef824f9a846cf935869d0dbc5070ef6e2f741 /drivers/clk/at91 | |
| download | linux-stable-a5f7a5bb3b7f28ba7e4fa246775b29a0e5537255.tar.gz linux-stable-a5f7a5bb3b7f28ba7e4fa246775b29a0e5537255.zip | |
x86/kprobes: Fix crash when probing CS CALL instructionsgrafted
When using eBPF to probe CS CALL instructions within a function,
a crash can be triggered.
The eBPF tool probes offset 257 of the __hrtimer_run_queues()
function:
<__hrtimer_run_queues+249>: nopl 0x0(%rax,%rax,1)
<__hrtimer_run_queues+254>: mov %r14,%rdi
<__hrtimer_run_queues+257>: cs call <__x86_indirect_thunk_r12>
<__hrtimer_run_queues+263>: mov %eax,%r12d
<__hrtimer_run_queues+266>: xchg %ax,%ax
<__hrtimer_run_queues+268>: mov %r13,%rdi
Which triggers this crash:
BUG: unable to handle page fault for address: 00000000000f41c9
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] SMP NOPTI
CPU: 1 PID: 0 Comm: swapper/1 Kdump: loaded Tainted: P
RIP: 0010:__hrtimer_run_queues+0x106/0x230
Note that __hrtimer_run_queues+0x106 is __hrtimer_run_queues+262, which is
at the 6th byte of the above CS CALL instruction. Since the CS CALL
instruction occupies 6 bytes, the exception occurred in the middle of that
call instruction.
The root cause is that when using eBPF tools to probe in the middle of a
function, a kprobe with INT3 is used as the underlying implementation.
During single-step emulation of the original CALL instruction,
int3_emulate_call() assumes that the probed CALL instruction is 5 bytes
long. However, the actual CS-prefixed CALL instruction occupies 6 bytes,
so it constructs an incorrect exception return address. When the CPU
returns from the kprobe handler, the next instruction to be executed is at
the address of the last byte of that CS CALL instruction. Coincidentally,
starting from that address, the CPU fetches and decodes a completely
different instruction, which ultimately triggers a kernel crash.
Fix the issue by using the actual instruction length obtained from
the instruction decoder when constructing the exception return
address, rather than relying on the hardcoded CALL_INSN_SIZE macro.
[ mingo: Refined the changelog ]
Fixes: 6256e668b7af ("x86/kprobes: Use int3 instead of debug trap for single-step")
Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Jinke Han <jinkehan@didiglobal.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://patch.msgid.link/20260908073742.GA10517@didi-ThinkCentre-M920t-N000
Diffstat (limited to 'drivers/clk/at91')
34 files changed, 14698 insertions, 0 deletions
diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile new file mode 100644 index 000000000..9128a06b8 --- /dev/null +++ b/drivers/clk/at91/Makefile @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for at91 specific clk +# + +obj-y += pmc.o sckc.o +obj-y += clk-slow.o clk-main.o clk-pll.o clk-plldiv.o clk-master.o +obj-y += clk-system.o clk-peripheral.o clk-programmable.o + +obj-$(CONFIG_HAVE_AT91_AUDIO_PLL) += clk-audio-pll.o +obj-$(CONFIG_HAVE_AT91_UTMI) += clk-utmi.o +obj-$(CONFIG_HAVE_AT91_USB_CLK) += clk-usb.o +obj-$(CONFIG_HAVE_AT91_SMD) += clk-smd.o +obj-$(CONFIG_HAVE_AT91_H32MX) += clk-h32mx.o +obj-$(CONFIG_HAVE_AT91_GENERATED_CLK) += clk-generated.o +obj-$(CONFIG_HAVE_AT91_I2S_MUX_CLK) += clk-i2s-mux.o +obj-$(CONFIG_HAVE_AT91_SAM9X60_PLL) += clk-sam9x60-pll.o +obj-$(CONFIG_SOC_AT91RM9200) += at91rm9200.o dt-compat.o +obj-$(CONFIG_SOC_AT91SAM9) += at91sam9260.o at91sam9rl.o at91sam9x5.o dt-compat.o +obj-$(CONFIG_SOC_AT91SAM9) += at91sam9g45.o dt-compat.o +obj-$(CONFIG_SOC_AT91SAM9) += at91sam9n12.o at91sam9x5.o dt-compat.o +obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o +obj-$(CONFIG_SOC_SAM9X7) += sam9x7.o +obj-$(CONFIG_SOC_SAMA5D3) += sama5d3.o dt-compat.o +obj-$(CONFIG_SOC_SAMA5D4) += sama5d4.o dt-compat.o +obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o dt-compat.o +obj-$(CONFIG_SOC_SAMA7D65) += sama7d65.o +obj-$(CONFIG_SOC_SAMA7G5) += sama7g5.o diff --git a/drivers/clk/at91/at91rm9200.c b/drivers/clk/at91/at91rm9200.c new file mode 100644 index 000000000..3f19e737a --- /dev/null +++ b/drivers/clk/at91/at91rm9200.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(rm9200_mck_lock); + +struct sck { + char *n; + char *p; + u8 id; +}; + +struct pck { + char *n; + u8 id; +}; + +static const struct clk_master_characteristics rm9200_mck_characteristics = { + .output = { .min = 0, .max = 80000000 }, + .divisors = { 1, 2, 3, 4 }, +}; + +static u8 rm9200_pll_out[] = { 0, 2 }; + +static const struct clk_range rm9200_pll_outputs[] = { + { .min = 80000000, .max = 160000000 }, + { .min = 150000000, .max = 180000000 }, +}; + +static const struct clk_pll_characteristics rm9200_pll_characteristics = { + .input = { .min = 1000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(rm9200_pll_outputs), + .output = rm9200_pll_outputs, + .out = rm9200_pll_out, +}; + +static const struct sck at91rm9200_systemck[] = { + { .n = "udpck", .p = "usbck", .id = 1 }, + { .n = "uhpck", .p = "usbck", .id = 4 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, + { .n = "pck2", .p = "prog2", .id = 10 }, + { .n = "pck3", .p = "prog3", .id = 11 }, +}; + +static const struct pck at91rm9200_periphck[] = { + { .n = "pioA_clk", .id = 2 }, + { .n = "pioB_clk", .id = 3 }, + { .n = "pioC_clk", .id = 4 }, + { .n = "pioD_clk", .id = 5 }, + { .n = "usart0_clk", .id = 6 }, + { .n = "usart1_clk", .id = 7 }, + { .n = "usart2_clk", .id = 8 }, + { .n = "usart3_clk", .id = 9 }, + { .n = "mci0_clk", .id = 10 }, + { .n = "udc_clk", .id = 11 }, + { .n = "twi0_clk", .id = 12 }, + { .n = "spi0_clk", .id = 13 }, + { .n = "ssc0_clk", .id = 14 }, + { .n = "ssc1_clk", .id = 15 }, + { .n = "ssc2_clk", .id = 16 }, + { .n = "tc0_clk", .id = 17 }, + { .n = "tc1_clk", .id = 18 }, + { .n = "tc2_clk", .id = 19 }, + { .n = "tc3_clk", .id = 20 }, + { .n = "tc4_clk", .id = 21 }, + { .n = "tc5_clk", .id = 22 }, + { .n = "ohci_clk", .id = 23 }, + { .n = "macb0_clk", .id = 24 }, +}; + +static void __init at91rm9200_pmc_setup(struct device_node *np) +{ + const char *slowxtal_name, *mainxtal_name; + struct pmc_data *at91rm9200_pmc; + u32 usb_div[] = { 1, 2, 0, 0 }; + const char *parent_names[6]; + struct regmap *regmap; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_xtal"); + if (i < 0) + return; + + slowxtal_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + at91rm9200_pmc = pmc_data_allocate(PMC_PLLBCK + 1, + nck(at91rm9200_systemck), + nck(at91rm9200_periphck), 0, 4); + if (!at91rm9200_pmc) + return; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_rm9200_main(regmap, "mainck", "main_osc", NULL); + if (IS_ERR(hw)) + goto err_free; + + at91rm9200_pmc->chws[PMC_MAIN] = hw; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &at91rm9200_pll_layout, + &rm9200_pll_characteristics); + if (IS_ERR(hw)) + goto err_free; + + at91rm9200_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_pll(regmap, "pllbck", "mainck", 1, + &at91rm9200_pll_layout, + &rm9200_pll_characteristics); + if (IS_ERR(hw)) + goto err_free; + + at91rm9200_pmc->chws[PMC_PLLBCK] = hw; + + parent_names[0] = slowxtal_name; + parent_names[1] = "mainck"; + parent_names[2] = "pllack"; + parent_names[3] = "pllbck"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91rm9200_master_layout, + &rm9200_mck_characteristics, + &rm9200_mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91rm9200_master_layout, + &rm9200_mck_characteristics, + &rm9200_mck_lock, CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + at91rm9200_pmc->chws[PMC_MCK] = hw; + + hw = at91rm9200_clk_register_usb(regmap, "usbck", "pllbck", usb_div); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slowxtal_name; + parent_names[1] = "mainck"; + parent_names[2] = "pllack"; + parent_names[3] = "pllbck"; + for (i = 0; i < 4; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 4, i, + &at91rm9200_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + at91rm9200_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91rm9200_systemck); i++) { + hw = at91_clk_register_system(regmap, at91rm9200_systemck[i].n, + at91rm9200_systemck[i].p, NULL, + at91rm9200_systemck[i].id, 0); + if (IS_ERR(hw)) + goto err_free; + + at91rm9200_pmc->shws[at91rm9200_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91rm9200_periphck); i++) { + hw = at91_clk_register_peripheral(regmap, + at91rm9200_periphck[i].n, + "masterck_div", NULL, + at91rm9200_periphck[i].id); + if (IS_ERR(hw)) + goto err_free; + + at91rm9200_pmc->phws[at91rm9200_periphck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91rm9200_pmc); + + return; + +err_free: + kfree(at91rm9200_pmc); +} +/* + * While the TCB can be used as the clocksource, the system timer is most likely + * to be used instead. However, the pinctrl driver doesn't support probe + * deferring properly. Once this is fixed, this can be switched to a platform + * driver. + */ +CLK_OF_DECLARE(at91rm9200_pmc, "atmel,at91rm9200-pmc", at91rm9200_pmc_setup); diff --git a/drivers/clk/at91/at91sam9260.c b/drivers/clk/at91/at91sam9260.c new file mode 100644 index 000000000..0799a1306 --- /dev/null +++ b/drivers/clk/at91/at91sam9260.c @@ -0,0 +1,515 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +struct sck { + char *n; + char *p; + u8 id; +}; + +struct pck { + char *n; + u8 id; +}; + +struct at91sam926x_data { + const struct clk_pll_layout *plla_layout; + const struct clk_pll_characteristics *plla_characteristics; + const struct clk_pll_layout *pllb_layout; + const struct clk_pll_characteristics *pllb_characteristics; + const struct clk_master_characteristics *mck_characteristics; + const struct sck *sck; + const struct pck *pck; + u8 num_sck; + u8 num_pck; + u8 num_progck; + bool has_slck; +}; + +static DEFINE_SPINLOCK(at91sam9260_mck_lock); + +static const struct clk_master_characteristics sam9260_mck_characteristics = { + .output = { .min = 0, .max = 105000000 }, + .divisors = { 1, 2, 4, 0 }, +}; + +static u8 sam9260_plla_out[] = { 0, 2 }; + +static u16 sam9260_plla_icpll[] = { 1, 1 }; + +static const struct clk_range sam9260_plla_outputs[] = { + { .min = 80000000, .max = 160000000 }, + { .min = 150000000, .max = 240000000 }, +}; + +static const struct clk_pll_characteristics sam9260_plla_characteristics = { + .input = { .min = 1000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(sam9260_plla_outputs), + .output = sam9260_plla_outputs, + .icpll = sam9260_plla_icpll, + .out = sam9260_plla_out, +}; + +static u8 sam9260_pllb_out[] = { 1 }; + +static u16 sam9260_pllb_icpll[] = { 1 }; + +static const struct clk_range sam9260_pllb_outputs[] = { + { .min = 70000000, .max = 130000000 }, +}; + +static const struct clk_pll_characteristics sam9260_pllb_characteristics = { + .input = { .min = 1000000, .max = 5000000 }, + .num_output = ARRAY_SIZE(sam9260_pllb_outputs), + .output = sam9260_pllb_outputs, + .icpll = sam9260_pllb_icpll, + .out = sam9260_pllb_out, +}; + +static const struct sck at91sam9260_systemck[] = { + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, +}; + +static const struct pck at91sam9260_periphck[] = { + { .n = "pioA_clk", .id = 2 }, + { .n = "pioB_clk", .id = 3 }, + { .n = "pioC_clk", .id = 4 }, + { .n = "adc_clk", .id = 5 }, + { .n = "usart0_clk", .id = 6 }, + { .n = "usart1_clk", .id = 7 }, + { .n = "usart2_clk", .id = 8 }, + { .n = "mci0_clk", .id = 9 }, + { .n = "udc_clk", .id = 10 }, + { .n = "twi0_clk", .id = 11 }, + { .n = "spi0_clk", .id = 12 }, + { .n = "spi1_clk", .id = 13 }, + { .n = "ssc0_clk", .id = 14 }, + { .n = "tc0_clk", .id = 17 }, + { .n = "tc1_clk", .id = 18 }, + { .n = "tc2_clk", .id = 19 }, + { .n = "ohci_clk", .id = 20 }, + { .n = "macb0_clk", .id = 21 }, + { .n = "isi_clk", .id = 22 }, + { .n = "usart3_clk", .id = 23 }, + { .n = "uart0_clk", .id = 24 }, + { .n = "uart1_clk", .id = 25 }, + { .n = "tc3_clk", .id = 26 }, + { .n = "tc4_clk", .id = 27 }, + { .n = "tc5_clk", .id = 28 }, +}; + +static struct at91sam926x_data at91sam9260_data = { + .plla_layout = &at91rm9200_pll_layout, + .plla_characteristics = &sam9260_plla_characteristics, + .pllb_layout = &at91rm9200_pll_layout, + .pllb_characteristics = &sam9260_pllb_characteristics, + .mck_characteristics = &sam9260_mck_characteristics, + .sck = at91sam9260_systemck, + .num_sck = ARRAY_SIZE(at91sam9260_systemck), + .pck = at91sam9260_periphck, + .num_pck = ARRAY_SIZE(at91sam9260_periphck), + .num_progck = 2, + .has_slck = true, +}; + +static const struct clk_master_characteristics sam9g20_mck_characteristics = { + .output = { .min = 0, .max = 133000000 }, + .divisors = { 1, 2, 4, 6 }, +}; + +static u8 sam9g20_plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 }; + +static u16 sam9g20_plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 }; + +static const struct clk_range sam9g20_plla_outputs[] = { + { .min = 745000000, .max = 800000000 }, + { .min = 695000000, .max = 750000000 }, + { .min = 645000000, .max = 700000000 }, + { .min = 595000000, .max = 650000000 }, + { .min = 545000000, .max = 600000000 }, + { .min = 495000000, .max = 550000000 }, + { .min = 445000000, .max = 500000000 }, + { .min = 400000000, .max = 450000000 }, +}; + +static const struct clk_pll_characteristics sam9g20_plla_characteristics = { + .input = { .min = 2000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(sam9g20_plla_outputs), + .output = sam9g20_plla_outputs, + .icpll = sam9g20_plla_icpll, + .out = sam9g20_plla_out, +}; + +static u8 sam9g20_pllb_out[] = { 0 }; + +static u16 sam9g20_pllb_icpll[] = { 0 }; + +static const struct clk_range sam9g20_pllb_outputs[] = { + { .min = 30000000, .max = 100000000 }, +}; + +static const struct clk_pll_characteristics sam9g20_pllb_characteristics = { + .input = { .min = 2000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(sam9g20_pllb_outputs), + .output = sam9g20_pllb_outputs, + .icpll = sam9g20_pllb_icpll, + .out = sam9g20_pllb_out, +}; + +static struct at91sam926x_data at91sam9g20_data = { + .plla_layout = &at91sam9g45_pll_layout, + .plla_characteristics = &sam9g20_plla_characteristics, + .pllb_layout = &at91sam9g20_pllb_layout, + .pllb_characteristics = &sam9g20_pllb_characteristics, + .mck_characteristics = &sam9g20_mck_characteristics, + .sck = at91sam9260_systemck, + .num_sck = ARRAY_SIZE(at91sam9260_systemck), + .pck = at91sam9260_periphck, + .num_pck = ARRAY_SIZE(at91sam9260_periphck), + .num_progck = 2, + .has_slck = true, +}; + +static const struct clk_master_characteristics sam9261_mck_characteristics = { + .output = { .min = 0, .max = 94000000 }, + .divisors = { 1, 2, 4, 0 }, +}; + +static const struct clk_range sam9261_plla_outputs[] = { + { .min = 80000000, .max = 200000000 }, + { .min = 190000000, .max = 240000000 }, +}; + +static const struct clk_pll_characteristics sam9261_plla_characteristics = { + .input = { .min = 1000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(sam9261_plla_outputs), + .output = sam9261_plla_outputs, + .icpll = sam9260_plla_icpll, + .out = sam9260_plla_out, +}; + +static u8 sam9261_pllb_out[] = { 1 }; + +static u16 sam9261_pllb_icpll[] = { 1 }; + +static const struct clk_range sam9261_pllb_outputs[] = { + { .min = 70000000, .max = 130000000 }, +}; + +static const struct clk_pll_characteristics sam9261_pllb_characteristics = { + .input = { .min = 1000000, .max = 5000000 }, + .num_output = ARRAY_SIZE(sam9261_pllb_outputs), + .output = sam9261_pllb_outputs, + .icpll = sam9261_pllb_icpll, + .out = sam9261_pllb_out, +}; + +static const struct sck at91sam9261_systemck[] = { + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, + { .n = "pck2", .p = "prog2", .id = 10 }, + { .n = "pck3", .p = "prog3", .id = 11 }, + { .n = "hclk0", .p = "masterck_div", .id = 16 }, + { .n = "hclk1", .p = "masterck_div", .id = 17 }, +}; + +static const struct pck at91sam9261_periphck[] = { + { .n = "pioA_clk", .id = 2, }, + { .n = "pioB_clk", .id = 3, }, + { .n = "pioC_clk", .id = 4, }, + { .n = "usart0_clk", .id = 6, }, + { .n = "usart1_clk", .id = 7, }, + { .n = "usart2_clk", .id = 8, }, + { .n = "mci0_clk", .id = 9, }, + { .n = "udc_clk", .id = 10, }, + { .n = "twi0_clk", .id = 11, }, + { .n = "spi0_clk", .id = 12, }, + { .n = "spi1_clk", .id = 13, }, + { .n = "ssc0_clk", .id = 14, }, + { .n = "ssc1_clk", .id = 15, }, + { .n = "ssc2_clk", .id = 16, }, + { .n = "tc0_clk", .id = 17, }, + { .n = "tc1_clk", .id = 18, }, + { .n = "tc2_clk", .id = 19, }, + { .n = "ohci_clk", .id = 20, }, + { .n = "lcd_clk", .id = 21, }, +}; + +static struct at91sam926x_data at91sam9261_data = { + .plla_layout = &at91rm9200_pll_layout, + .plla_characteristics = &sam9261_plla_characteristics, + .pllb_layout = &at91rm9200_pll_layout, + .pllb_characteristics = &sam9261_pllb_characteristics, + .mck_characteristics = &sam9261_mck_characteristics, + .sck = at91sam9261_systemck, + .num_sck = ARRAY_SIZE(at91sam9261_systemck), + .pck = at91sam9261_periphck, + .num_pck = ARRAY_SIZE(at91sam9261_periphck), + .num_progck = 4, +}; + +static const struct clk_master_characteristics sam9263_mck_characteristics = { + .output = { .min = 0, .max = 120000000 }, + .divisors = { 1, 2, 4, 0 }, +}; + +static const struct clk_range sam9263_pll_outputs[] = { + { .min = 80000000, .max = 200000000 }, + { .min = 190000000, .max = 240000000 }, +}; + +static const struct clk_pll_characteristics sam9263_pll_characteristics = { + .input = { .min = 1000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(sam9263_pll_outputs), + .output = sam9263_pll_outputs, + .icpll = sam9260_plla_icpll, + .out = sam9260_plla_out, +}; + +static const struct sck at91sam9263_systemck[] = { + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, + { .n = "pck2", .p = "prog2", .id = 10 }, + { .n = "pck3", .p = "prog3", .id = 11 }, +}; + +static const struct pck at91sam9263_periphck[] = { + { .n = "pioA_clk", .id = 2, }, + { .n = "pioB_clk", .id = 3, }, + { .n = "pioCDE_clk", .id = 4, }, + { .n = "usart0_clk", .id = 7, }, + { .n = "usart1_clk", .id = 8, }, + { .n = "usart2_clk", .id = 9, }, + { .n = "mci0_clk", .id = 10, }, + { .n = "mci1_clk", .id = 11, }, + { .n = "can_clk", .id = 12, }, + { .n = "twi0_clk", .id = 13, }, + { .n = "spi0_clk", .id = 14, }, + { .n = "spi1_clk", .id = 15, }, + { .n = "ssc0_clk", .id = 16, }, + { .n = "ssc1_clk", .id = 17, }, + { .n = "ac97_clk", .id = 18, }, + { .n = "tcb_clk", .id = 19, }, + { .n = "pwm_clk", .id = 20, }, + { .n = "macb0_clk", .id = 21, }, + { .n = "g2de_clk", .id = 23, }, + { .n = "udc_clk", .id = 24, }, + { .n = "isi_clk", .id = 25, }, + { .n = "lcd_clk", .id = 26, }, + { .n = "dma_clk", .id = 27, }, + { .n = "ohci_clk", .id = 29, }, +}; + +static struct at91sam926x_data at91sam9263_data = { + .plla_layout = &at91rm9200_pll_layout, + .plla_characteristics = &sam9263_pll_characteristics, + .pllb_layout = &at91rm9200_pll_layout, + .pllb_characteristics = &sam9263_pll_characteristics, + .mck_characteristics = &sam9263_mck_characteristics, + .sck = at91sam9263_systemck, + .num_sck = ARRAY_SIZE(at91sam9263_systemck), + .pck = at91sam9263_periphck, + .num_pck = ARRAY_SIZE(at91sam9263_periphck), + .num_progck = 4, +}; + +static void __init at91sam926x_pmc_setup(struct device_node *np, + struct at91sam926x_data *data) +{ + const char *slowxtal_name, *mainxtal_name; + struct pmc_data *at91sam9260_pmc; + u32 usb_div[] = { 1, 2, 4, 0 }; + const char *parent_names[6]; + const char *slck_name; + struct regmap *regmap; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_xtal"); + if (i < 0) + return; + + slowxtal_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + at91sam9260_pmc = pmc_data_allocate(PMC_PLLBCK + 1, + ndck(data->sck, data->num_sck), + ndck(data->pck, data->num_pck), + 0, data->num_progck); + if (!at91sam9260_pmc) + return; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_rm9200_main(regmap, "mainck", "main_osc", NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->chws[PMC_MAIN] = hw; + + if (data->has_slck) { + hw = clk_hw_register_fixed_rate_with_accuracy(NULL, + "slow_rc_osc", + NULL, 0, 32768, + 50000000); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = "slow_rc_osc"; + parent_names[1] = "slow_xtal"; + hw = at91_clk_register_sam9260_slow(regmap, "slck", + parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->chws[PMC_SLOW] = hw; + slck_name = "slck"; + } else { + slck_name = slowxtal_name; + } + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + data->plla_layout, + data->plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_pll(regmap, "pllbck", "mainck", 1, + data->pllb_layout, + data->pllb_characteristics); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->chws[PMC_PLLBCK] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "pllack"; + parent_names[3] = "pllbck"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91rm9200_master_layout, + data->mck_characteristics, + &at91sam9260_mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91rm9200_master_layout, + data->mck_characteristics, + &at91sam9260_mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->chws[PMC_MCK] = hw; + + hw = at91rm9200_clk_register_usb(regmap, "usbck", "pllbck", usb_div); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "pllack"; + parent_names[3] = "pllbck"; + for (i = 0; i < data->num_progck; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 4, i, + &at91rm9200_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->pchws[i] = hw; + } + + for (i = 0; i < data->num_sck; i++) { + hw = at91_clk_register_system(regmap, data->sck[i].n, + data->sck[i].p, NULL, + data->sck[i].id, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->shws[data->sck[i].id] = hw; + } + + for (i = 0; i < data->num_pck; i++) { + hw = at91_clk_register_peripheral(regmap, + data->pck[i].n, + "masterck_div", NULL, + data->pck[i].id); + if (IS_ERR(hw)) + goto err_free; + + at91sam9260_pmc->phws[data->pck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9260_pmc); + + return; + +err_free: + kfree(at91sam9260_pmc); +} + +static void __init at91sam9260_pmc_setup(struct device_node *np) +{ + at91sam926x_pmc_setup(np, &at91sam9260_data); +} + +CLK_OF_DECLARE(at91sam9260_pmc, "atmel,at91sam9260-pmc", at91sam9260_pmc_setup); + +static void __init at91sam9261_pmc_setup(struct device_node *np) +{ + at91sam926x_pmc_setup(np, &at91sam9261_data); +} + +CLK_OF_DECLARE(at91sam9261_pmc, "atmel,at91sam9261-pmc", at91sam9261_pmc_setup); + +static void __init at91sam9263_pmc_setup(struct device_node *np) +{ + at91sam926x_pmc_setup(np, &at91sam9263_data); +} + +CLK_OF_DECLARE(at91sam9263_pmc, "atmel,at91sam9263-pmc", at91sam9263_pmc_setup); + +static void __init at91sam9g20_pmc_setup(struct device_node *np) +{ + at91sam926x_pmc_setup(np, &at91sam9g20_data); +} + +CLK_OF_DECLARE(at91sam9g20_pmc, "atmel,at91sam9g20-pmc", at91sam9g20_pmc_setup); diff --git a/drivers/clk/at91/at91sam9g45.c b/drivers/clk/at91/at91sam9g45.c new file mode 100644 index 000000000..f45a7b80f --- /dev/null +++ b/drivers/clk/at91/at91sam9g45.c @@ -0,0 +1,236 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(at91sam9g45_mck_lock); + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 0, .max = 133333333 }, + .divisors = { 1, 2, 4, 3 }, +}; + +static u8 plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 }; + +static u16 plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 }; + +static const struct clk_range plla_outputs[] = { + { .min = 745000000, .max = 800000000 }, + { .min = 695000000, .max = 750000000 }, + { .min = 645000000, .max = 700000000 }, + { .min = 595000000, .max = 650000000 }, + { .min = 545000000, .max = 600000000 }, + { .min = 495000000, .max = 555000000 }, + { .min = 445000000, .max = 500000000 }, + { .min = 400000000, .max = 450000000 }, +}; + +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 2000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .icpll = plla_icpll, + .out = plla_out, +}; + +static const struct { + char *n; + char *p; + unsigned long flags; + u8 id; +} at91sam9g45_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, +}; + +struct pck { + char *n; + u8 id; +}; + +static const struct pck at91sam9g45_periphck[] = { + { .n = "pioA_clk", .id = 2, }, + { .n = "pioB_clk", .id = 3, }, + { .n = "pioC_clk", .id = 4, }, + { .n = "pioDE_clk", .id = 5, }, + { .n = "trng_clk", .id = 6, }, + { .n = "usart0_clk", .id = 7, }, + { .n = "usart1_clk", .id = 8, }, + { .n = "usart2_clk", .id = 9, }, + { .n = "usart3_clk", .id = 10, }, + { .n = "mci0_clk", .id = 11, }, + { .n = "twi0_clk", .id = 12, }, + { .n = "twi1_clk", .id = 13, }, + { .n = "spi0_clk", .id = 14, }, + { .n = "spi1_clk", .id = 15, }, + { .n = "ssc0_clk", .id = 16, }, + { .n = "ssc1_clk", .id = 17, }, + { .n = "tcb0_clk", .id = 18, }, + { .n = "pwm_clk", .id = 19, }, + { .n = "adc_clk", .id = 20, }, + { .n = "dma0_clk", .id = 21, }, + { .n = "uhphs_clk", .id = 22, }, + { .n = "lcd_clk", .id = 23, }, + { .n = "ac97_clk", .id = 24, }, + { .n = "macb0_clk", .id = 25, }, + { .n = "isi_clk", .id = 26, }, + { .n = "udphs_clk", .id = 27, }, + { .n = "aestdessha_clk", .id = 28, }, + { .n = "mci1_clk", .id = 29, }, + { .n = "vdec_clk", .id = 30, }, +}; + +static void __init at91sam9g45_pmc_setup(struct device_node *np) +{ + const char *slck_name, *mainxtal_name; + struct pmc_data *at91sam9g45_pmc; + const char *parent_names[6]; + struct regmap *regmap; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_clk"); + if (i < 0) + return; + + slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + at91sam9g45_pmc = pmc_data_allocate(PMC_PLLACK + 1, + nck(at91sam9g45_systemck), + nck(at91sam9g45_periphck), 0, 2); + if (!at91sam9g45_pmc) + return; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_rm9200_main(regmap, "mainck", "main_osc", NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->chws[PMC_MAIN] = hw; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &at91rm9200_pll_layout, &plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91rm9200_master_layout, + &mck_characteristics, + &at91sam9g45_mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91rm9200_master_layout, + &mck_characteristics, + &at91sam9g45_mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->chws[PMC_MCK] = hw; + + parent_names[0] = "plladivck"; + parent_names[1] = "utmick"; + hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + parent_names[4] = "masterck_div"; + for (i = 0; i < 2; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 5, i, + &at91sam9g45_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9g45_systemck); i++) { + hw = at91_clk_register_system(regmap, at91sam9g45_systemck[i].n, + at91sam9g45_systemck[i].p, NULL, + at91sam9g45_systemck[i].id, + at91sam9g45_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->shws[at91sam9g45_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9g45_periphck); i++) { + hw = at91_clk_register_peripheral(regmap, + at91sam9g45_periphck[i].n, + "masterck_div", NULL, + at91sam9g45_periphck[i].id); + if (IS_ERR(hw)) + goto err_free; + + at91sam9g45_pmc->phws[at91sam9g45_periphck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9g45_pmc); + + return; + +err_free: + kfree(at91sam9g45_pmc); +} +/* + * The TCB is used as the clocksource so its clock is needed early. This means + * this can't be a platform driver. + */ +CLK_OF_DECLARE(at91sam9g45_pmc, "atmel,at91sam9g45-pmc", at91sam9g45_pmc_setup); diff --git a/drivers/clk/at91/at91sam9n12.c b/drivers/clk/at91/at91sam9n12.c new file mode 100644 index 000000000..751786184 --- /dev/null +++ b/drivers/clk/at91/at91sam9n12.c @@ -0,0 +1,263 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(at91sam9n12_mck_lock); + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 0, .max = 133333333 }, + .divisors = { 1, 2, 4, 3 }, + .have_div3_pres = 1, +}; + +static u8 plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 }; + +static u16 plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 }; + +static const struct clk_range plla_outputs[] = { + { .min = 745000000, .max = 800000000 }, + { .min = 695000000, .max = 750000000 }, + { .min = 645000000, .max = 700000000 }, + { .min = 595000000, .max = 650000000 }, + { .min = 545000000, .max = 600000000 }, + { .min = 495000000, .max = 555000000 }, + { .min = 445000000, .max = 500000000 }, + { .min = 400000000, .max = 450000000 }, +}; + +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 2000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .icpll = plla_icpll, + .out = plla_out, +}; + +static u8 pllb_out[] = { 0 }; + +static const struct clk_range pllb_outputs[] = { + { .min = 30000000, .max = 100000000 }, +}; + +static const struct clk_pll_characteristics pllb_characteristics = { + .input = { .min = 2000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(pllb_outputs), + .output = pllb_outputs, + .out = pllb_out, +}; + +static const struct { + char *n; + char *p; + unsigned long flags; + u8 id; +} at91sam9n12_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "lcdck", .p = "masterck_div", .id = 3 }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, +}; + +static const struct clk_pcr_layout at91sam9n12_pcr_layout = { + .offset = 0x10c, + .cmd = BIT(12), + .pid_mask = GENMASK(5, 0), + .div_mask = GENMASK(17, 16), +}; + +struct pck { + char *n; + u8 id; +}; + +static const struct pck at91sam9n12_periphck[] = { + { .n = "pioAB_clk", .id = 2, }, + { .n = "pioCD_clk", .id = 3, }, + { .n = "fuse_clk", .id = 4, }, + { .n = "usart0_clk", .id = 5, }, + { .n = "usart1_clk", .id = 6, }, + { .n = "usart2_clk", .id = 7, }, + { .n = "usart3_clk", .id = 8, }, + { .n = "twi0_clk", .id = 9, }, + { .n = "twi1_clk", .id = 10, }, + { .n = "mci0_clk", .id = 12, }, + { .n = "spi0_clk", .id = 13, }, + { .n = "spi1_clk", .id = 14, }, + { .n = "uart0_clk", .id = 15, }, + { .n = "uart1_clk", .id = 16, }, + { .n = "tcb_clk", .id = 17, }, + { .n = "pwm_clk", .id = 18, }, + { .n = "adc_clk", .id = 19, }, + { .n = "dma0_clk", .id = 20, }, + { .n = "uhphs_clk", .id = 22, }, + { .n = "udphs_clk", .id = 23, }, + { .n = "lcdc_clk", .id = 25, }, + { .n = "sha_clk", .id = 27, }, + { .n = "ssc0_clk", .id = 28, }, + { .n = "aes_clk", .id = 29, }, + { .n = "trng_clk", .id = 30, }, +}; + +static void __init at91sam9n12_pmc_setup(struct device_node *np) +{ + struct clk_range range = CLK_RANGE(0, 0); + const char *slck_name, *mainxtal_name; + struct pmc_data *at91sam9n12_pmc; + const char *parent_names[6]; + struct regmap *regmap; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_clk"); + if (i < 0) + return; + + slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + at91sam9n12_pmc = pmc_data_allocate(PMC_PLLBCK + 1, + nck(at91sam9n12_systemck), 31, 0, 2); + if (!at91sam9n12_pmc) + return; + + hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 50000000); + if (IS_ERR(hw)) + goto err_free; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = "main_rc_osc"; + parent_names[1] = "main_osc"; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); + if (IS_ERR(hw)) + goto err_free; + + at91sam9n12_pmc->chws[PMC_MAIN] = hw; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &at91rm9200_pll_layout, &plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); + if (IS_ERR(hw)) + goto err_free; + + at91sam9n12_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_pll(regmap, "pllbck", "mainck", 1, + &at91rm9200_pll_layout, &pllb_characteristics); + if (IS_ERR(hw)) + goto err_free; + + at91sam9n12_pmc->chws[PMC_PLLBCK] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "pllbck"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91sam9x5_master_layout, + &mck_characteristics, + &at91sam9n12_mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91sam9x5_master_layout, + &mck_characteristics, + &at91sam9n12_mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9n12_pmc->chws[PMC_MCK] = hw; + + hw = at91sam9n12_clk_register_usb(regmap, "usbck", "pllbck"); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "pllbck"; + parent_names[4] = "masterck_div"; + for (i = 0; i < 2; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 5, i, + &at91sam9x5_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9n12_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9n12_systemck); i++) { + hw = at91_clk_register_system(regmap, at91sam9n12_systemck[i].n, + at91sam9n12_systemck[i].p, NULL, + at91sam9n12_systemck[i].id, + at91sam9n12_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + at91sam9n12_pmc->shws[at91sam9n12_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9n12_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &at91sam9n12_pcr_layout, + at91sam9n12_periphck[i].n, + "masterck_div", NULL, + at91sam9n12_periphck[i].id, + &range, INT_MIN, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9n12_pmc->phws[at91sam9n12_periphck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9n12_pmc); + + return; + +err_free: + kfree(at91sam9n12_pmc); +} +/* + * The TCB is used as the clocksource so its clock is needed early. This means + * this can't be a platform driver. + */ +CLK_OF_DECLARE(at91sam9n12_pmc, "atmel,at91sam9n12-pmc", at91sam9n12_pmc_setup); diff --git a/drivers/clk/at91/at91sam9rl.c b/drivers/clk/at91/at91sam9rl.c new file mode 100644 index 000000000..969f809e7 --- /dev/null +++ b/drivers/clk/at91/at91sam9rl.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(sam9rl_mck_lock); + +static const struct clk_master_characteristics sam9rl_mck_characteristics = { + .output = { .min = 0, .max = 94000000 }, + .divisors = { 1, 2, 4, 0 }, +}; + +static u8 sam9rl_plla_out[] = { 0, 2 }; + +static const struct clk_range sam9rl_plla_outputs[] = { + { .min = 80000000, .max = 200000000 }, + { .min = 190000000, .max = 240000000 }, +}; + +static const struct clk_pll_characteristics sam9rl_plla_characteristics = { + .input = { .min = 1000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(sam9rl_plla_outputs), + .output = sam9rl_plla_outputs, + .out = sam9rl_plla_out, +}; + +static const struct { + char *n; + char *p; + u8 id; +} at91sam9rl_systemck[] = { + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, +}; + +static const struct { + char *n; + u8 id; +} at91sam9rl_periphck[] = { + { .n = "pioA_clk", .id = 2, }, + { .n = "pioB_clk", .id = 3, }, + { .n = "pioC_clk", .id = 4, }, + { .n = "pioD_clk", .id = 5, }, + { .n = "usart0_clk", .id = 6, }, + { .n = "usart1_clk", .id = 7, }, + { .n = "usart2_clk", .id = 8, }, + { .n = "usart3_clk", .id = 9, }, + { .n = "mci0_clk", .id = 10, }, + { .n = "twi0_clk", .id = 11, }, + { .n = "twi1_clk", .id = 12, }, + { .n = "spi0_clk", .id = 13, }, + { .n = "ssc0_clk", .id = 14, }, + { .n = "ssc1_clk", .id = 15, }, + { .n = "tc0_clk", .id = 16, }, + { .n = "tc1_clk", .id = 17, }, + { .n = "tc2_clk", .id = 18, }, + { .n = "pwm_clk", .id = 19, }, + { .n = "adc_clk", .id = 20, }, + { .n = "dma0_clk", .id = 21, }, + { .n = "udphs_clk", .id = 22, }, + { .n = "lcd_clk", .id = 23, }, +}; + +static void __init at91sam9rl_pmc_setup(struct device_node *np) +{ + const char *slck_name, *mainxtal_name; + struct pmc_data *at91sam9rl_pmc; + const char *parent_names[6]; + struct regmap *regmap; + struct clk_hw *hw; + int i; + + i = of_property_match_string(np, "clock-names", "slow_clk"); + if (i < 0) + return; + + slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + at91sam9rl_pmc = pmc_data_allocate(PMC_PLLACK + 1, + nck(at91sam9rl_systemck), + nck(at91sam9rl_periphck), 0, 2); + if (!at91sam9rl_pmc) + return; + + hw = at91_clk_register_rm9200_main(regmap, "mainck", mainxtal_name, NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9rl_pmc->chws[PMC_MAIN] = hw; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &at91rm9200_pll_layout, + &sam9rl_plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + at91sam9rl_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9rl_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "pllack"; + parent_names[3] = "utmick"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91rm9200_master_layout, + &sam9rl_mck_characteristics, + &sam9rl_mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91rm9200_master_layout, + &sam9rl_mck_characteristics, + &sam9rl_mck_lock, CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9rl_pmc->chws[PMC_MCK] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "pllack"; + parent_names[3] = "utmick"; + parent_names[4] = "masterck_div"; + for (i = 0; i < 2; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 5, i, + &at91rm9200_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9rl_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9rl_systemck); i++) { + hw = at91_clk_register_system(regmap, at91sam9rl_systemck[i].n, + at91sam9rl_systemck[i].p, NULL, + at91sam9rl_systemck[i].id, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9rl_pmc->shws[at91sam9rl_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9rl_periphck); i++) { + hw = at91_clk_register_peripheral(regmap, + at91sam9rl_periphck[i].n, + "masterck_div", NULL, + at91sam9rl_periphck[i].id); + if (IS_ERR(hw)) + goto err_free; + + at91sam9rl_pmc->phws[at91sam9rl_periphck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9rl_pmc); + + return; + +err_free: + kfree(at91sam9rl_pmc); +} + +CLK_OF_DECLARE(at91sam9rl_pmc, "atmel,at91sam9rl-pmc", at91sam9rl_pmc_setup); diff --git a/drivers/clk/at91/at91sam9x5.c b/drivers/clk/at91/at91sam9x5.c new file mode 100644 index 000000000..3b801d12f --- /dev/null +++ b/drivers/clk/at91/at91sam9x5.c @@ -0,0 +1,340 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(mck_lock); + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 0, .max = 133333333 }, + .divisors = { 1, 2, 4, 3 }, + .have_div3_pres = 1, +}; + +static u8 plla_out[] = { 0, 1, 2, 3, 0, 1, 2, 3 }; + +static u16 plla_icpll[] = { 0, 0, 0, 0, 1, 1, 1, 1 }; + +static const struct clk_range plla_outputs[] = { + { .min = 745000000, .max = 800000000 }, + { .min = 695000000, .max = 750000000 }, + { .min = 645000000, .max = 700000000 }, + { .min = 595000000, .max = 650000000 }, + { .min = 545000000, .max = 600000000 }, + { .min = 495000000, .max = 555000000 }, + { .min = 445000000, .max = 500000000 }, + { .min = 400000000, .max = 450000000 }, +}; + +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 2000000, .max = 32000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .icpll = plla_icpll, + .out = plla_out, +}; + +static const struct { + char *n; + char *p; + unsigned long flags; + u8 id; +} at91sam9x5_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "smdck", .p = "smdclk", .id = 4 }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, +}; + +static const struct clk_pcr_layout at91sam9x5_pcr_layout = { + .offset = 0x10c, + .cmd = BIT(12), + .pid_mask = GENMASK(5, 0), + .div_mask = GENMASK(17, 16), +}; + +struct pck { + char *n; + u8 id; +}; + +static const struct pck at91sam9x5_periphck[] = { + { .n = "pioAB_clk", .id = 2, }, + { .n = "pioCD_clk", .id = 3, }, + { .n = "smd_clk", .id = 4, }, + { .n = "usart0_clk", .id = 5, }, + { .n = "usart1_clk", .id = 6, }, + { .n = "usart2_clk", .id = 7, }, + { .n = "twi0_clk", .id = 9, }, + { .n = "twi1_clk", .id = 10, }, + { .n = "twi2_clk", .id = 11, }, + { .n = "mci0_clk", .id = 12, }, + { .n = "spi0_clk", .id = 13, }, + { .n = "spi1_clk", .id = 14, }, + { .n = "uart0_clk", .id = 15, }, + { .n = "uart1_clk", .id = 16, }, + { .n = "tcb0_clk", .id = 17, }, + { .n = "pwm_clk", .id = 18, }, + { .n = "adc_clk", .id = 19, }, + { .n = "dma0_clk", .id = 20, }, + { .n = "dma1_clk", .id = 21, }, + { .n = "uhphs_clk", .id = 22, }, + { .n = "udphs_clk", .id = 23, }, + { .n = "mci1_clk", .id = 26, }, + { .n = "ssc0_clk", .id = 28, }, +}; + +static const struct pck at91sam9g15_periphck[] = { + { .n = "lcdc_clk", .id = 25, }, + { /* sentinel */} +}; + +static const struct pck at91sam9g25_periphck[] = { + { .n = "usart3_clk", .id = 8, }, + { .n = "macb0_clk", .id = 24, }, + { .n = "isi_clk", .id = 25, }, + { /* sentinel */} +}; + +static const struct pck at91sam9g35_periphck[] = { + { .n = "macb0_clk", .id = 24, }, + { .n = "lcdc_clk", .id = 25, }, + { /* sentinel */} +}; + +static const struct pck at91sam9x25_periphck[] = { + { .n = "usart3_clk", .id = 8, }, + { .n = "macb0_clk", .id = 24, }, + { .n = "macb1_clk", .id = 27, }, + { .n = "can0_clk", .id = 29, }, + { .n = "can1_clk", .id = 30, }, + { /* sentinel */} +}; + +static const struct pck at91sam9x35_periphck[] = { + { .n = "macb0_clk", .id = 24, }, + { .n = "lcdc_clk", .id = 25, }, + { .n = "can0_clk", .id = 29, }, + { .n = "can1_clk", .id = 30, }, + { /* sentinel */} +}; + +static void __init at91sam9x5_pmc_setup(struct device_node *np, + const struct pck *extra_pcks, + bool has_lcdck) +{ + struct clk_range range = CLK_RANGE(0, 0); + const char *slck_name, *mainxtal_name; + struct pmc_data *at91sam9x5_pmc; + const char *parent_names[6]; + struct regmap *regmap; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_clk"); + if (i < 0) + return; + + slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + at91sam9x5_pmc = pmc_data_allocate(PMC_PLLACK + 1, + nck(at91sam9x5_systemck), 31, 0, 2); + if (!at91sam9x5_pmc) + return; + + hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 50000000); + if (IS_ERR(hw)) + goto err_free; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = "main_rc_osc"; + parent_names[1] = "main_osc"; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->chws[PMC_MAIN] = hw; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &at91rm9200_pll_layout, &plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->chws[PMC_MCK] = hw; + + parent_names[0] = "plladivck"; + parent_names[1] = "utmick"; + hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + parent_names[4] = "masterck_div"; + for (i = 0; i < 2; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 5, i, + &at91sam9x5_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9x5_systemck); i++) { + hw = at91_clk_register_system(regmap, at91sam9x5_systemck[i].n, + at91sam9x5_systemck[i].p, NULL, + at91sam9x5_systemck[i].id, + at91sam9x5_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->shws[at91sam9x5_systemck[i].id] = hw; + } + + if (has_lcdck) { + hw = at91_clk_register_system(regmap, "lcdck", "masterck_div", + NULL, 3, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->shws[3] = hw; + } + + for (i = 0; i < ARRAY_SIZE(at91sam9x5_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &at91sam9x5_pcr_layout, + at91sam9x5_periphck[i].n, + "masterck_div", NULL, + at91sam9x5_periphck[i].id, + &range, INT_MIN, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->phws[at91sam9x5_periphck[i].id] = hw; + } + + for (i = 0; extra_pcks[i].id; i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &at91sam9x5_pcr_layout, + extra_pcks[i].n, + "masterck_div", NULL, + extra_pcks[i].id, + &range, INT_MIN, 0); + if (IS_ERR(hw)) + goto err_free; + + at91sam9x5_pmc->phws[extra_pcks[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, at91sam9x5_pmc); + + return; + +err_free: + kfree(at91sam9x5_pmc); +} + +static void __init at91sam9g15_pmc_setup(struct device_node *np) +{ + at91sam9x5_pmc_setup(np, at91sam9g15_periphck, true); +} + +CLK_OF_DECLARE(at91sam9g15_pmc, "atmel,at91sam9g15-pmc", at91sam9g15_pmc_setup); + +static void __init at91sam9g25_pmc_setup(struct device_node *np) +{ + at91sam9x5_pmc_setup(np, at91sam9g25_periphck, false); +} + +CLK_OF_DECLARE(at91sam9g25_pmc, "atmel,at91sam9g25-pmc", at91sam9g25_pmc_setup); + +static void __init at91sam9g35_pmc_setup(struct device_node *np) +{ + at91sam9x5_pmc_setup(np, at91sam9g35_periphck, true); +} + +CLK_OF_DECLARE(at91sam9g35_pmc, "atmel,at91sam9g35-pmc", at91sam9g35_pmc_setup); + +static void __init at91sam9x25_pmc_setup(struct device_node *np) +{ + at91sam9x5_pmc_setup(np, at91sam9x25_periphck, false); +} + +CLK_OF_DECLARE(at91sam9x25_pmc, "atmel,at91sam9x25-pmc", at91sam9x25_pmc_setup); + +static void __init at91sam9x35_pmc_setup(struct device_node *np) +{ + at91sam9x5_pmc_setup(np, at91sam9x35_periphck, true); +} + +CLK_OF_DECLARE(at91sam9x35_pmc, "atmel,at91sam9x35-pmc", at91sam9x35_pmc_setup); diff --git a/drivers/clk/at91/clk-audio-pll.c b/drivers/clk/at91/clk-audio-pll.c new file mode 100644 index 000000000..732037bfb --- /dev/null +++ b/drivers/clk/at91/clk-audio-pll.c @@ -0,0 +1,545 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2016 Atmel Corporation, + * Songjun Wu <songjun.wu@atmel.com>, + * Nicolas Ferre <nicolas.ferre@atmel.com> + * Copyright (C) 2017 Free Electrons, + * Quentin Schulz <quentin.schulz@free-electrons.com> + * + * The Sama5d2 SoC has two audio PLLs (PMC and PAD) that shares the same parent + * (FRAC). FRAC can output between 620 and 700MHz and only multiply the rate of + * its own parent. PMC and PAD can then divide the FRAC rate to best match the + * asked rate. + * + * Traits of FRAC clock: + * enable - clk_enable writes nd, fracr parameters and enables PLL + * rate - rate is adjustable. + * clk->rate = parent->rate * ((nd + 1) + (fracr / 2^22)) + * parent - fixed parent. No clk_set_parent support + * + * Traits of PMC clock: + * enable - clk_enable writes qdpmc, and enables PMC output + * rate - rate is adjustable. + * clk->rate = parent->rate / (qdpmc + 1) + * parent - fixed parent. No clk_set_parent support + * + * Traits of PAD clock: + * enable - clk_enable writes divisors and enables PAD output + * rate - rate is adjustable. + * clk->rate = parent->rate / (qdaudio * div)) + * parent - fixed parent. No clk_set_parent support + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include "pmc.h" + +#define AUDIO_PLL_DIV_FRAC BIT(22) +#define AUDIO_PLL_ND_MAX (AT91_PMC_AUDIO_PLL_ND_MASK >> \ + AT91_PMC_AUDIO_PLL_ND_OFFSET) + +#define AUDIO_PLL_QDPAD(qd, div) ((AT91_PMC_AUDIO_PLL_QDPAD_EXTDIV(qd) & \ + AT91_PMC_AUDIO_PLL_QDPAD_EXTDIV_MASK) | \ + (AT91_PMC_AUDIO_PLL_QDPAD_DIV(div) & \ + AT91_PMC_AUDIO_PLL_QDPAD_DIV_MASK)) + +#define AUDIO_PLL_QDPMC_MAX (AT91_PMC_AUDIO_PLL_QDPMC_MASK >> \ + AT91_PMC_AUDIO_PLL_QDPMC_OFFSET) + +#define AUDIO_PLL_FOUT_MIN 620000000UL +#define AUDIO_PLL_FOUT_MAX 700000000UL + +struct clk_audio_frac { + struct clk_hw hw; + struct regmap *regmap; + u32 fracr; + u8 nd; +}; + +struct clk_audio_pad { + struct clk_hw hw; + struct regmap *regmap; + u8 qdaudio; + u8 div; +}; + +struct clk_audio_pmc { + struct clk_hw hw; + struct regmap *regmap; + u8 qdpmc; +}; + +#define to_clk_audio_frac(hw) container_of(hw, struct clk_audio_frac, hw) +#define to_clk_audio_pad(hw) container_of(hw, struct clk_audio_pad, hw) +#define to_clk_audio_pmc(hw) container_of(hw, struct clk_audio_pmc, hw) + +static int clk_audio_pll_frac_enable(struct clk_hw *hw) +{ + struct clk_audio_frac *frac = to_clk_audio_frac(hw); + + regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_RESETN, 0); + regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_RESETN, + AT91_PMC_AUDIO_PLL_RESETN); + regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL1, + AT91_PMC_AUDIO_PLL_FRACR_MASK, frac->fracr); + + /* + * reset and enable have to be done in 2 separated writes + * for AT91_PMC_AUDIO_PLL0 + */ + regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_PLLEN | + AT91_PMC_AUDIO_PLL_ND_MASK, + AT91_PMC_AUDIO_PLL_PLLEN | + AT91_PMC_AUDIO_PLL_ND(frac->nd)); + + return 0; +} + +static int clk_audio_pll_pad_enable(struct clk_hw *hw) +{ + struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw); + + regmap_update_bits(apad_ck->regmap, AT91_PMC_AUDIO_PLL1, + AT91_PMC_AUDIO_PLL_QDPAD_MASK, + AUDIO_PLL_QDPAD(apad_ck->qdaudio, apad_ck->div)); + regmap_update_bits(apad_ck->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_PADEN, AT91_PMC_AUDIO_PLL_PADEN); + + return 0; +} + +static int clk_audio_pll_pmc_enable(struct clk_hw *hw) +{ + struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw); + + regmap_update_bits(apmc_ck->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_PMCEN | + AT91_PMC_AUDIO_PLL_QDPMC_MASK, + AT91_PMC_AUDIO_PLL_PMCEN | + AT91_PMC_AUDIO_PLL_QDPMC(apmc_ck->qdpmc)); + return 0; +} + +static void clk_audio_pll_frac_disable(struct clk_hw *hw) +{ + struct clk_audio_frac *frac = to_clk_audio_frac(hw); + + regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_PLLEN, 0); + /* do it in 2 separated writes */ + regmap_update_bits(frac->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_RESETN, 0); +} + +static void clk_audio_pll_pad_disable(struct clk_hw *hw) +{ + struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw); + + regmap_update_bits(apad_ck->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_PADEN, 0); +} + +static void clk_audio_pll_pmc_disable(struct clk_hw *hw) +{ + struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw); + + regmap_update_bits(apmc_ck->regmap, AT91_PMC_AUDIO_PLL0, + AT91_PMC_AUDIO_PLL_PMCEN, 0); +} + +static unsigned long clk_audio_pll_fout(unsigned long parent_rate, + unsigned long nd, unsigned long fracr) +{ + unsigned long long fr = (unsigned long long)parent_rate * fracr; + + pr_debug("A PLL: %s, fr = %llu\n", __func__, fr); + + fr = DIV_ROUND_CLOSEST_ULL(fr, AUDIO_PLL_DIV_FRAC); + + pr_debug("A PLL: %s, fr = %llu\n", __func__, fr); + + return parent_rate * (nd + 1) + fr; +} + +static unsigned long clk_audio_pll_frac_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_audio_frac *frac = to_clk_audio_frac(hw); + unsigned long fout; + + fout = clk_audio_pll_fout(parent_rate, frac->nd, frac->fracr); + + pr_debug("A PLL: %s, fout = %lu (nd = %u, fracr = %lu)\n", __func__, + fout, frac->nd, (unsigned long)frac->fracr); + + return fout; +} + +static unsigned long clk_audio_pll_pad_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw); + unsigned long apad_rate = 0; + + if (apad_ck->qdaudio && apad_ck->div) + apad_rate = parent_rate / (apad_ck->qdaudio * apad_ck->div); + + pr_debug("A PLL/PAD: %s, apad_rate = %lu (div = %u, qdaudio = %u)\n", + __func__, apad_rate, apad_ck->div, apad_ck->qdaudio); + + return apad_rate; +} + +static unsigned long clk_audio_pll_pmc_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw); + unsigned long apmc_rate = 0; + + apmc_rate = parent_rate / (apmc_ck->qdpmc + 1); + + pr_debug("A PLL/PMC: %s, apmc_rate = %lu (qdpmc = %u)\n", __func__, + apmc_rate, apmc_ck->qdpmc); + + return apmc_rate; +} + +static int clk_audio_pll_frac_compute_frac(unsigned long rate, + unsigned long parent_rate, + unsigned long *nd, + unsigned long *fracr) +{ + unsigned long long tmp, rem; + + if (!rate) + return -EINVAL; + + tmp = rate; + rem = do_div(tmp, parent_rate); + if (!tmp || tmp >= AUDIO_PLL_ND_MAX) + return -EINVAL; + + *nd = tmp - 1; + + tmp = rem * AUDIO_PLL_DIV_FRAC; + tmp = DIV_ROUND_CLOSEST_ULL(tmp, parent_rate); + if (tmp > AT91_PMC_AUDIO_PLL_FRACR_MASK) + return -EINVAL; + + /* we can cast here as we verified the bounds just above */ + *fracr = (unsigned long)tmp; + + return 0; +} + +static int clk_audio_pll_frac_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + unsigned long fracr, nd; + int ret; + + pr_debug("A PLL: %s, rate = %lu (parent_rate = %lu)\n", __func__, + req->rate, req->best_parent_rate); + + req->rate = clamp(req->rate, AUDIO_PLL_FOUT_MIN, AUDIO_PLL_FOUT_MAX); + + req->min_rate = max(req->min_rate, AUDIO_PLL_FOUT_MIN); + req->max_rate = min(req->max_rate, AUDIO_PLL_FOUT_MAX); + + ret = clk_audio_pll_frac_compute_frac(req->rate, req->best_parent_rate, + &nd, &fracr); + if (ret) + return ret; + + req->rate = clk_audio_pll_fout(req->best_parent_rate, nd, fracr); + + req->best_parent_hw = clk_hw_get_parent(hw); + + pr_debug("A PLL: %s, best_rate = %lu (nd = %lu, fracr = %lu)\n", + __func__, req->rate, nd, fracr); + + return 0; +} + +static int clk_audio_pll_pad_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_hw *pclk = clk_hw_get_parent(hw); + long best_rate = -EINVAL; + unsigned long best_parent_rate; + unsigned long tmp_qd; + u32 div; + long tmp_rate; + int tmp_diff; + int best_diff = -1; + + pr_debug("A PLL/PAD: %s, rate = %lu (parent_rate = %lu)\n", __func__, + req->rate, req->best_parent_rate); + + /* + * Rate divisor is actually made of two different divisors, multiplied + * between themselves before dividing the rate. + * tmp_qd goes from 1 to 31 and div is either 2 or 3. + * In order to avoid testing twice the rate divisor (e.g. divisor 12 can + * be found with (tmp_qd, div) = (2, 6) or (3, 4)), we remove any loop + * for a rate divisor when div is 2 and tmp_qd is a multiple of 3. + * We cannot inverse it (condition div is 3 and tmp_qd is even) or we + * would miss some rate divisor that aren't reachable with div being 2 + * (e.g. rate divisor 90 is made with div = 3 and tmp_qd = 30, thus + * tmp_qd is even so we skip it because we think div 2 could make this + * rate divisor which isn't possible since tmp_qd has to be <= 31). + */ + for (tmp_qd = 1; tmp_qd < AT91_PMC_AUDIO_PLL_QDPAD_EXTDIV_MAX; tmp_qd++) + for (div = 2; div <= 3; div++) { + if (div == 2 && tmp_qd % 3 == 0) + continue; + + best_parent_rate = clk_hw_round_rate(pclk, + req->rate * tmp_qd * div); + tmp_rate = best_parent_rate / (div * tmp_qd); + tmp_diff = abs(req->rate - tmp_rate); + + if (best_diff < 0 || best_diff > tmp_diff) { + req->best_parent_rate = best_parent_rate; + best_rate = tmp_rate; + best_diff = tmp_diff; + } + } + + pr_debug("A PLL/PAD: %s, best_rate = %ld, best_parent_rate = %lu\n", + __func__, best_rate, best_parent_rate); + + req->rate = best_rate; + + return 0; +} + +static int clk_audio_pll_pmc_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_hw *pclk = clk_hw_get_parent(hw); + long best_rate = -EINVAL; + unsigned long best_parent_rate = 0; + u32 tmp_qd = 0, div; + long tmp_rate; + int tmp_diff; + int best_diff = -1; + + pr_debug("A PLL/PMC: %s, rate = %lu (parent_rate = %lu)\n", __func__, + req->rate, req->best_parent_rate); + + if (!req->rate) + return 0; + + best_parent_rate = clk_round_rate(pclk->clk, 1); + div = max(best_parent_rate / req->rate, 1UL); + for (; div <= AUDIO_PLL_QDPMC_MAX; div++) { + best_parent_rate = clk_round_rate(pclk->clk, req->rate * div); + tmp_rate = best_parent_rate / div; + tmp_diff = abs(req->rate - tmp_rate); + + if (best_diff < 0 || best_diff > tmp_diff) { + req->best_parent_rate = best_parent_rate; + best_rate = tmp_rate; + best_diff = tmp_diff; + tmp_qd = div; + if (!best_diff) + break; /* got exact match */ + } + } + + pr_debug("A PLL/PMC: %s, best_rate = %ld, best_parent_rate = %lu (qd = %d)\n", + __func__, best_rate, req->best_parent_rate, tmp_qd - 1); + + req->rate = best_rate; + + return 0; +} + +static int clk_audio_pll_frac_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_audio_frac *frac = to_clk_audio_frac(hw); + unsigned long fracr, nd; + int ret; + + pr_debug("A PLL: %s, rate = %lu (parent_rate = %lu)\n", __func__, rate, + parent_rate); + + if (rate < AUDIO_PLL_FOUT_MIN || rate > AUDIO_PLL_FOUT_MAX) + return -EINVAL; + + ret = clk_audio_pll_frac_compute_frac(rate, parent_rate, &nd, &fracr); + if (ret) + return ret; + + frac->nd = nd; + frac->fracr = fracr; + + return 0; +} + +static int clk_audio_pll_pad_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_audio_pad *apad_ck = to_clk_audio_pad(hw); + u8 tmp_div; + + pr_debug("A PLL/PAD: %s, rate = %lu (parent_rate = %lu)\n", __func__, + rate, parent_rate); + + if (!rate) + return -EINVAL; + + tmp_div = parent_rate / rate; + if (tmp_div % 3 == 0) { + apad_ck->qdaudio = tmp_div / 3; + apad_ck->div = 3; + } else { + apad_ck->qdaudio = tmp_div / 2; + apad_ck->div = 2; + } + + return 0; +} + +static int clk_audio_pll_pmc_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_audio_pmc *apmc_ck = to_clk_audio_pmc(hw); + + if (!rate) + return -EINVAL; + + pr_debug("A PLL/PMC: %s, rate = %lu (parent_rate = %lu)\n", __func__, + rate, parent_rate); + + apmc_ck->qdpmc = parent_rate / rate - 1; + + return 0; +} + +static const struct clk_ops audio_pll_frac_ops = { + .enable = clk_audio_pll_frac_enable, + .disable = clk_audio_pll_frac_disable, + .recalc_rate = clk_audio_pll_frac_recalc_rate, + .determine_rate = clk_audio_pll_frac_determine_rate, + .set_rate = clk_audio_pll_frac_set_rate, +}; + +static const struct clk_ops audio_pll_pad_ops = { + .enable = clk_audio_pll_pad_enable, + .disable = clk_audio_pll_pad_disable, + .recalc_rate = clk_audio_pll_pad_recalc_rate, + .determine_rate = clk_audio_pll_pad_determine_rate, + .set_rate = clk_audio_pll_pad_set_rate, +}; + +static const struct clk_ops audio_pll_pmc_ops = { + .enable = clk_audio_pll_pmc_enable, + .disable = clk_audio_pll_pmc_disable, + .recalc_rate = clk_audio_pll_pmc_recalc_rate, + .determine_rate = clk_audio_pll_pmc_determine_rate, + .set_rate = clk_audio_pll_pmc_set_rate, +}; + +struct clk_hw * __init +at91_clk_register_audio_pll_frac(struct regmap *regmap, const char *name, + const char *parent_name) +{ + struct clk_audio_frac *frac_ck; + struct clk_init_data init = {}; + int ret; + + frac_ck = kzalloc_obj(*frac_ck); + if (!frac_ck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &audio_pll_frac_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_SET_RATE_GATE; + + frac_ck->hw.init = &init; + frac_ck->regmap = regmap; + + ret = clk_hw_register(NULL, &frac_ck->hw); + if (ret) { + kfree(frac_ck); + return ERR_PTR(ret); + } + + return &frac_ck->hw; +} + +struct clk_hw * __init +at91_clk_register_audio_pll_pad(struct regmap *regmap, const char *name, + const char *parent_name) +{ + struct clk_audio_pad *apad_ck; + struct clk_init_data init; + int ret; + + apad_ck = kzalloc_obj(*apad_ck); + if (!apad_ck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &audio_pll_pad_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT; + + apad_ck->hw.init = &init; + apad_ck->regmap = regmap; + + ret = clk_hw_register(NULL, &apad_ck->hw); + if (ret) { + kfree(apad_ck); + return ERR_PTR(ret); + } + + return &apad_ck->hw; +} + +struct clk_hw * __init +at91_clk_register_audio_pll_pmc(struct regmap *regmap, const char *name, + const char *parent_name) +{ + struct clk_audio_pmc *apmc_ck; + struct clk_init_data init; + int ret; + + apmc_ck = kzalloc_obj(*apmc_ck); + if (!apmc_ck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &audio_pll_pmc_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT; + + apmc_ck->hw.init = &init; + apmc_ck->regmap = regmap; + + ret = clk_hw_register(NULL, &apmc_ck->hw); + if (ret) { + kfree(apmc_ck); + return ERR_PTR(ret); + } + + return &apmc_ck->hw; +} diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c new file mode 100644 index 000000000..5d3a62433 --- /dev/null +++ b/drivers/clk/at91/clk-generated.c @@ -0,0 +1,368 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2015 Atmel Corporation, + * Nicolas Ferre <nicolas.ferre@atmel.com> + * + * Based on clk-programmable & clk-peripheral drivers by Boris BREZILLON. + */ + +#include <linux/bitfield.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define GENERATED_MAX_DIV 255 + +struct clk_generated { + struct clk_hw hw; + struct regmap *regmap; + struct clk_range range; + spinlock_t *lock; + u32 *mux_table; + u32 id; + u32 gckdiv; + const struct clk_pcr_layout *layout; + struct at91_clk_pms pms; + u8 parent_id; + int chg_pid; +}; + +#define to_clk_generated(hw) \ + container_of(hw, struct clk_generated, hw) + +static int clk_generated_set(struct clk_generated *gck, int status) +{ + unsigned long flags; + unsigned int enable = status ? AT91_PMC_PCR_GCKEN : 0; + + spin_lock_irqsave(gck->lock, flags); + regmap_write(gck->regmap, gck->layout->offset, + (gck->id & gck->layout->pid_mask)); + regmap_update_bits(gck->regmap, gck->layout->offset, + AT91_PMC_PCR_GCKDIV_MASK | gck->layout->gckcss_mask | + gck->layout->cmd | enable, + field_prep(gck->layout->gckcss_mask, gck->parent_id) | + gck->layout->cmd | + FIELD_PREP(AT91_PMC_PCR_GCKDIV_MASK, gck->gckdiv) | + enable); + spin_unlock_irqrestore(gck->lock, flags); + + return 0; +} + +static int clk_generated_enable(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + + pr_debug("GCLK: %s, gckdiv = %d, parent id = %d\n", + __func__, gck->gckdiv, gck->parent_id); + + clk_generated_set(gck, 1); + + return 0; +} + +static void clk_generated_disable(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + unsigned long flags; + + spin_lock_irqsave(gck->lock, flags); + regmap_write(gck->regmap, gck->layout->offset, + (gck->id & gck->layout->pid_mask)); + regmap_update_bits(gck->regmap, gck->layout->offset, + gck->layout->cmd | AT91_PMC_PCR_GCKEN, + gck->layout->cmd); + spin_unlock_irqrestore(gck->lock, flags); +} + +static int clk_generated_is_enabled(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + unsigned long flags; + unsigned int status; + + spin_lock_irqsave(gck->lock, flags); + regmap_write(gck->regmap, gck->layout->offset, + (gck->id & gck->layout->pid_mask)); + regmap_read(gck->regmap, gck->layout->offset, &status); + spin_unlock_irqrestore(gck->lock, flags); + + return !!(status & AT91_PMC_PCR_GCKEN); +} + +static unsigned long +clk_generated_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_generated *gck = to_clk_generated(hw); + + return DIV_ROUND_CLOSEST(parent_rate, gck->gckdiv + 1); +} + +static void clk_generated_best_diff(struct clk_rate_request *req, + struct clk_hw *parent, + unsigned long parent_rate, u32 div, + int *best_diff, long *best_rate) +{ + unsigned long tmp_rate; + int tmp_diff; + + if (!div) + tmp_rate = parent_rate; + else + tmp_rate = parent_rate / div; + + if (tmp_rate < req->min_rate || tmp_rate > req->max_rate) + return; + + tmp_diff = abs(req->rate - tmp_rate); + + if (*best_diff < 0 || *best_diff >= tmp_diff) { + *best_rate = tmp_rate; + *best_diff = tmp_diff; + req->best_parent_rate = parent_rate; + req->best_parent_hw = parent; + } +} + +static int clk_generated_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_generated *gck = to_clk_generated(hw); + struct clk_hw *parent = NULL; + long best_rate = -EINVAL; + unsigned long min_rate, parent_rate; + int best_diff = -1; + int i; + u32 div; + + /* do not look for a rate that is outside of our range */ + if (gck->range.max && req->rate > gck->range.max) + req->rate = gck->range.max; + if (gck->range.min && req->rate < gck->range.min) + req->rate = gck->range.min; + + for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + if (gck->chg_pid == i) + continue; + + parent = clk_hw_get_parent_by_index(hw, i); + if (!parent) + continue; + + parent_rate = clk_hw_get_rate(parent); + min_rate = DIV_ROUND_CLOSEST(parent_rate, GENERATED_MAX_DIV + 1); + if (!parent_rate || + (gck->range.max && min_rate > gck->range.max)) + continue; + + div = DIV_ROUND_CLOSEST(parent_rate, req->rate); + if (div > GENERATED_MAX_DIV + 1) + div = GENERATED_MAX_DIV + 1; + + clk_generated_best_diff(req, parent, parent_rate, div, + &best_diff, &best_rate); + + if (!best_diff) + break; + } + + /* + * The audio_pll rate can be modified, unlike the five others clocks + * that should never be altered. + * The audio_pll can technically be used by multiple consumers. However, + * with the rate locking, the first consumer to enable to clock will be + * the one definitely setting the rate of the clock. + * Since audio IPs are most likely to request the same rate, we enforce + * that the only clks able to modify gck rate are those of audio IPs. + */ + + if (gck->chg_pid < 0) + goto end; + + parent = clk_hw_get_parent_by_index(hw, gck->chg_pid); + if (!parent) + goto end; + + for (div = 1; div < GENERATED_MAX_DIV + 2; div++) { + struct clk_rate_request req_parent; + + clk_hw_forward_rate_request(hw, req, parent, &req_parent, req->rate * div); + if (__clk_determine_rate(parent, &req_parent)) + continue; + clk_generated_best_diff(req, parent, req_parent.rate, div, + &best_diff, &best_rate); + + if (!best_diff) + break; + } + +end: + pr_debug("GCLK: %s, best_rate = %ld, parent clk: %s @ %ld\n", + __func__, best_rate, + __clk_get_name((req->best_parent_hw)->clk), + req->best_parent_rate); + + if (best_rate < 0 || (gck->range.max && best_rate > gck->range.max)) + return -EINVAL; + + req->rate = best_rate; + return 0; +} + +/* No modification of hardware as we have the flag CLK_SET_PARENT_GATE set */ +static int clk_generated_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_generated *gck = to_clk_generated(hw); + + if (index >= clk_hw_get_num_parents(hw)) + return -EINVAL; + + if (gck->mux_table) + gck->parent_id = clk_mux_index_to_val(gck->mux_table, 0, index); + else + gck->parent_id = index; + + return 0; +} + +static u8 clk_generated_get_parent(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + + return gck->parent_id; +} + +/* No modification of hardware as we have the flag CLK_SET_RATE_GATE set */ +static int clk_generated_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + struct clk_generated *gck = to_clk_generated(hw); + u32 div; + + if (!rate) + return -EINVAL; + + if (gck->range.max && rate > gck->range.max) + return -EINVAL; + + div = DIV_ROUND_CLOSEST(parent_rate, rate); + if (div > GENERATED_MAX_DIV + 1 || !div) + return -EINVAL; + + gck->gckdiv = div - 1; + return 0; +} + +static int clk_generated_save_context(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + + gck->pms.status = clk_generated_is_enabled(&gck->hw); + + return 0; +} + +static void clk_generated_restore_context(struct clk_hw *hw) +{ + struct clk_generated *gck = to_clk_generated(hw); + + if (gck->pms.status) + clk_generated_set(gck, gck->pms.status); +} + +static const struct clk_ops generated_ops = { + .enable = clk_generated_enable, + .disable = clk_generated_disable, + .is_enabled = clk_generated_is_enabled, + .recalc_rate = clk_generated_recalc_rate, + .determine_rate = clk_generated_determine_rate, + .get_parent = clk_generated_get_parent, + .set_parent = clk_generated_set_parent, + .set_rate = clk_generated_set_rate, + .save_context = clk_generated_save_context, + .restore_context = clk_generated_restore_context, +}; + +/** + * clk_generated_startup - Initialize a given clock to its default parent and + * divisor parameter. + * + * @gck: Generated clock to set the startup parameters for. + * + * Take parameters from the hardware and update local clock configuration + * accordingly. + */ +static void clk_generated_startup(struct clk_generated *gck) +{ + u32 tmp; + unsigned long flags; + + spin_lock_irqsave(gck->lock, flags); + regmap_write(gck->regmap, gck->layout->offset, + (gck->id & gck->layout->pid_mask)); + regmap_read(gck->regmap, gck->layout->offset, &tmp); + spin_unlock_irqrestore(gck->lock, flags); + + gck->parent_id = field_get(gck->layout->gckcss_mask, tmp); + gck->gckdiv = FIELD_GET(AT91_PMC_PCR_GCKDIV_MASK, tmp); +} + +struct clk_hw * __init +at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock, + const struct clk_pcr_layout *layout, + const char *name, const char **parent_names, + struct clk_hw **parent_hws, + u32 *mux_table, u8 num_parents, u8 id, + const struct clk_range *range, + int chg_pid) +{ + struct clk_generated *gck; + struct clk_init_data init = {}; + struct clk_hw *hw; + int ret; + + if (!(parent_names || parent_hws)) + return ERR_PTR(-ENOMEM); + + gck = kzalloc_obj(*gck); + if (!gck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &generated_ops; + if (parent_hws) + init.parent_hws = (const struct clk_hw **)parent_hws; + else + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; + if (chg_pid >= 0) + init.flags |= CLK_SET_RATE_PARENT; + + gck->id = id; + gck->hw.init = &init; + gck->regmap = regmap; + gck->lock = lock; + gck->range = *range; + gck->chg_pid = chg_pid; + gck->layout = layout; + gck->mux_table = mux_table; + + clk_generated_startup(gck); + hw = &gck->hw; + ret = clk_hw_register(NULL, &gck->hw); + if (ret) { + kfree(gck); + hw = ERR_PTR(ret); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-h32mx.c b/drivers/clk/at91/clk-h32mx.c new file mode 100644 index 000000000..12bd112d3 --- /dev/null +++ b/drivers/clk/at91/clk-h32mx.c @@ -0,0 +1,123 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * clk-h32mx.c + * + * Copyright (C) 2014 Atmel + * + * Alexandre Belloni <alexandre.belloni@free-electrons.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> + +#include "pmc.h" + +#define H32MX_MAX_FREQ 90000000 + +struct clk_sama5d4_h32mx { + struct clk_hw hw; + struct regmap *regmap; +}; + +#define to_clk_sama5d4_h32mx(hw) container_of(hw, struct clk_sama5d4_h32mx, hw) + +static unsigned long clk_sama5d4_h32mx_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw); + unsigned int mckr; + + regmap_read(h32mxclk->regmap, AT91_PMC_MCKR, &mckr); + if (mckr & AT91_PMC_H32MXDIV) + return parent_rate / 2; + + if (parent_rate > H32MX_MAX_FREQ) + pr_warn("H32MX clock is too fast\n"); + return parent_rate; +} + +static int clk_sama5d4_h32mx_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + unsigned long div; + + if (req->rate > req->best_parent_rate) { + req->rate = req->best_parent_rate; + + return 0; + } + div = req->best_parent_rate / 2; + if (req->rate < div) { + req->rate = div; + + return 0; + } + + if (req->rate - div < req->best_parent_rate - req->rate) { + req->rate = div; + + return 0; + } + + req->rate = req->best_parent_rate; + + return 0; +} + +static int clk_sama5d4_h32mx_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_sama5d4_h32mx *h32mxclk = to_clk_sama5d4_h32mx(hw); + u32 mckr = 0; + + if (parent_rate != rate && (parent_rate / 2) != rate) + return -EINVAL; + + if ((parent_rate / 2) == rate) + mckr = AT91_PMC_H32MXDIV; + + regmap_update_bits(h32mxclk->regmap, AT91_PMC_MCKR, + AT91_PMC_H32MXDIV, mckr); + + return 0; +} + +static const struct clk_ops h32mx_ops = { + .recalc_rate = clk_sama5d4_h32mx_recalc_rate, + .determine_rate = clk_sama5d4_h32mx_determine_rate, + .set_rate = clk_sama5d4_h32mx_set_rate, +}; + +struct clk_hw * __init +at91_clk_register_h32mx(struct regmap *regmap, const char *name, + const char *parent_name) +{ + struct clk_sama5d4_h32mx *h32mxclk; + struct clk_init_data init; + int ret; + + h32mxclk = kzalloc_obj(*h32mxclk); + if (!h32mxclk) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &h32mx_ops; + init.parent_names = parent_name ? &parent_name : NULL; + init.num_parents = parent_name ? 1 : 0; + init.flags = CLK_SET_RATE_GATE; + + h32mxclk->hw.init = &init; + h32mxclk->regmap = regmap; + + ret = clk_hw_register(NULL, &h32mxclk->hw); + if (ret) { + kfree(h32mxclk); + return ERR_PTR(ret); + } + + return &h32mxclk->hw; +} diff --git a/drivers/clk/at91/clk-i2s-mux.c b/drivers/clk/at91/clk-i2s-mux.c new file mode 100644 index 000000000..a762c56dc --- /dev/null +++ b/drivers/clk/at91/clk-i2s-mux.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Microchip Technology Inc, + * Codrin Ciubotariu <codrin.ciubotariu@microchip.com> + * + * + */ + +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include <soc/at91/atmel-sfr.h> + +#include "pmc.h" + +struct clk_i2s_mux { + struct clk_hw hw; + struct regmap *regmap; + u8 bus_id; +}; + +#define to_clk_i2s_mux(hw) container_of(hw, struct clk_i2s_mux, hw) + +static u8 clk_i2s_mux_get_parent(struct clk_hw *hw) +{ + struct clk_i2s_mux *mux = to_clk_i2s_mux(hw); + u32 val; + + regmap_read(mux->regmap, AT91_SFR_I2SCLKSEL, &val); + + return (val & BIT(mux->bus_id)) >> mux->bus_id; +} + +static int clk_i2s_mux_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_i2s_mux *mux = to_clk_i2s_mux(hw); + + return regmap_update_bits(mux->regmap, AT91_SFR_I2SCLKSEL, + BIT(mux->bus_id), index << mux->bus_id); +} + +static const struct clk_ops clk_i2s_mux_ops = { + .get_parent = clk_i2s_mux_get_parent, + .set_parent = clk_i2s_mux_set_parent, + .determine_rate = __clk_mux_determine_rate, +}; + +struct clk_hw * __init +at91_clk_i2s_mux_register(struct regmap *regmap, const char *name, + const char * const *parent_names, + unsigned int num_parents, u8 bus_id) +{ + struct clk_init_data init = {}; + struct clk_i2s_mux *i2s_ck; + int ret; + + i2s_ck = kzalloc_obj(*i2s_ck); + if (!i2s_ck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &clk_i2s_mux_ops; + init.parent_names = parent_names; + init.num_parents = num_parents; + + i2s_ck->hw.init = &init; + i2s_ck->bus_id = bus_id; + i2s_ck->regmap = regmap; + + ret = clk_hw_register(NULL, &i2s_ck->hw); + if (ret) { + kfree(i2s_ck); + return ERR_PTR(ret); + } + + return &i2s_ck->hw; +} diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c new file mode 100644 index 000000000..ab515239a --- /dev/null +++ b/drivers/clk/at91/clk-main.c @@ -0,0 +1,596 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/delay.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define SLOW_CLOCK_FREQ 32768 +#define MAINF_DIV 16 +#define MAINFRDY_TIMEOUT (((MAINF_DIV + 1) * USEC_PER_SEC) / \ + SLOW_CLOCK_FREQ) +#define MAINF_LOOP_MIN_WAIT (USEC_PER_SEC / SLOW_CLOCK_FREQ) +#define MAINF_LOOP_MAX_WAIT MAINFRDY_TIMEOUT + +#define MOR_KEY_MASK (0xff << 16) + +#define clk_main_parent_select(s) (((s) & \ + (AT91_PMC_MOSCEN | \ + AT91_PMC_OSCBYPASS)) ? 1 : 0) + +struct clk_main_osc { + struct clk_hw hw; + struct regmap *regmap; + struct at91_clk_pms pms; +}; + +#define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, hw) + +struct clk_main_rc_osc { + struct clk_hw hw; + struct regmap *regmap; + unsigned long frequency; + unsigned long accuracy; + struct at91_clk_pms pms; +}; + +#define to_clk_main_rc_osc(hw) container_of(hw, struct clk_main_rc_osc, hw) + +struct clk_rm9200_main { + struct clk_hw hw; + struct regmap *regmap; +}; + +#define to_clk_rm9200_main(hw) container_of(hw, struct clk_rm9200_main, hw) + +struct clk_sam9x5_main { + struct clk_hw hw; + struct regmap *regmap; + struct at91_clk_pms pms; + u8 parent; +}; + +#define to_clk_sam9x5_main(hw) container_of(hw, struct clk_sam9x5_main, hw) + +static inline bool clk_main_osc_ready(struct regmap *regmap) +{ + unsigned int status; + + regmap_read(regmap, AT91_PMC_SR, &status); + + return status & AT91_PMC_MOSCS; +} + +static int clk_main_osc_prepare(struct clk_hw *hw) +{ + struct clk_main_osc *osc = to_clk_main_osc(hw); + struct regmap *regmap = osc->regmap; + u32 tmp; + + regmap_read(regmap, AT91_CKGR_MOR, &tmp); + tmp &= ~MOR_KEY_MASK; + + if (tmp & AT91_PMC_OSCBYPASS) + return 0; + + if (!(tmp & AT91_PMC_MOSCEN)) { + tmp |= AT91_PMC_MOSCEN | AT91_PMC_KEY; + regmap_write(regmap, AT91_CKGR_MOR, tmp); + } + + while (!clk_main_osc_ready(regmap)) + cpu_relax(); + + return 0; +} + +static void clk_main_osc_unprepare(struct clk_hw *hw) +{ + struct clk_main_osc *osc = to_clk_main_osc(hw); + struct regmap *regmap = osc->regmap; + u32 tmp; + + regmap_read(regmap, AT91_CKGR_MOR, &tmp); + if (tmp & AT91_PMC_OSCBYPASS) + return; + + if (!(tmp & AT91_PMC_MOSCEN)) + return; + + tmp &= ~(AT91_PMC_KEY | AT91_PMC_MOSCEN); + regmap_write(regmap, AT91_CKGR_MOR, tmp | AT91_PMC_KEY); +} + +static int clk_main_osc_is_prepared(struct clk_hw *hw) +{ + struct clk_main_osc *osc = to_clk_main_osc(hw); + struct regmap *regmap = osc->regmap; + u32 tmp, status; + + regmap_read(regmap, AT91_CKGR_MOR, &tmp); + if (tmp & AT91_PMC_OSCBYPASS) + return 1; + + regmap_read(regmap, AT91_PMC_SR, &status); + + return (status & AT91_PMC_MOSCS) && clk_main_parent_select(tmp); +} + +static int clk_main_osc_save_context(struct clk_hw *hw) +{ + struct clk_main_osc *osc = to_clk_main_osc(hw); + + osc->pms.status = clk_main_osc_is_prepared(hw); + + return 0; +} + +static void clk_main_osc_restore_context(struct clk_hw *hw) +{ + struct clk_main_osc *osc = to_clk_main_osc(hw); + + if (osc->pms.status) + clk_main_osc_prepare(hw); +} + +static const struct clk_ops main_osc_ops = { + .prepare = clk_main_osc_prepare, + .unprepare = clk_main_osc_unprepare, + .is_prepared = clk_main_osc_is_prepared, + .save_context = clk_main_osc_save_context, + .restore_context = clk_main_osc_restore_context, +}; + +struct clk_hw * __init +at91_clk_register_main_osc(struct regmap *regmap, + const char *name, + const char *parent_name, + struct clk_parent_data *parent_data, + bool bypass) +{ + struct clk_main_osc *osc; + struct clk_init_data init = {}; + struct clk_hw *hw; + int ret; + + if (!name || !(parent_name || parent_data)) + return ERR_PTR(-EINVAL); + + osc = kzalloc_obj(*osc); + if (!osc) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &main_osc_ops; + if (parent_data) + init.parent_data = (const struct clk_parent_data *)parent_data; + else + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_IGNORE_UNUSED; + + osc->hw.init = &init; + osc->regmap = regmap; + + if (bypass) + regmap_update_bits(regmap, + AT91_CKGR_MOR, MOR_KEY_MASK | + AT91_PMC_OSCBYPASS, + AT91_PMC_OSCBYPASS | AT91_PMC_KEY); + + hw = &osc->hw; + ret = clk_hw_register(NULL, &osc->hw); + if (ret) { + kfree(osc); + hw = ERR_PTR(ret); + } + + return hw; +} + +static bool clk_main_rc_osc_ready(struct regmap *regmap) +{ + unsigned int status; + + regmap_read(regmap, AT91_PMC_SR, &status); + + return !!(status & AT91_PMC_MOSCRCS); +} + +static int clk_main_rc_osc_prepare(struct clk_hw *hw) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + struct regmap *regmap = osc->regmap; + unsigned int mor; + + regmap_read(regmap, AT91_CKGR_MOR, &mor); + + if (!(mor & AT91_PMC_MOSCRCEN)) + regmap_update_bits(regmap, AT91_CKGR_MOR, + MOR_KEY_MASK | AT91_PMC_MOSCRCEN, + AT91_PMC_MOSCRCEN | AT91_PMC_KEY); + + while (!clk_main_rc_osc_ready(regmap)) + cpu_relax(); + + return 0; +} + +static void clk_main_rc_osc_unprepare(struct clk_hw *hw) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + struct regmap *regmap = osc->regmap; + unsigned int mor; + + regmap_read(regmap, AT91_CKGR_MOR, &mor); + + if (!(mor & AT91_PMC_MOSCRCEN)) + return; + + regmap_update_bits(regmap, AT91_CKGR_MOR, + MOR_KEY_MASK | AT91_PMC_MOSCRCEN, AT91_PMC_KEY); +} + +static int clk_main_rc_osc_is_prepared(struct clk_hw *hw) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + struct regmap *regmap = osc->regmap; + unsigned int mor, status; + + regmap_read(regmap, AT91_CKGR_MOR, &mor); + regmap_read(regmap, AT91_PMC_SR, &status); + + return (mor & AT91_PMC_MOSCRCEN) && (status & AT91_PMC_MOSCRCS); +} + +static unsigned long clk_main_rc_osc_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + + return osc->frequency; +} + +static unsigned long clk_main_rc_osc_recalc_accuracy(struct clk_hw *hw, + unsigned long parent_acc) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + + return osc->accuracy; +} + +static int clk_main_rc_osc_save_context(struct clk_hw *hw) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + + osc->pms.status = clk_main_rc_osc_is_prepared(hw); + + return 0; +} + +static void clk_main_rc_osc_restore_context(struct clk_hw *hw) +{ + struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw); + + if (osc->pms.status) + clk_main_rc_osc_prepare(hw); +} + +static const struct clk_ops main_rc_osc_ops = { + .prepare = clk_main_rc_osc_prepare, + .unprepare = clk_main_rc_osc_unprepare, + .is_prepared = clk_main_rc_osc_is_prepared, + .recalc_rate = clk_main_rc_osc_recalc_rate, + .recalc_accuracy = clk_main_rc_osc_recalc_accuracy, + .save_context = clk_main_rc_osc_save_context, + .restore_context = clk_main_rc_osc_restore_context, +}; + +struct clk_hw * __init +at91_clk_register_main_rc_osc(struct regmap *regmap, + const char *name, + u32 frequency, u32 accuracy) +{ + struct clk_main_rc_osc *osc; + struct clk_init_data init; + struct clk_hw *hw; + int ret; + + if (!name || !frequency) + return ERR_PTR(-EINVAL); + + osc = kzalloc_obj(*osc); + if (!osc) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &main_rc_osc_ops; + init.parent_names = NULL; + init.num_parents = 0; + init.flags = CLK_IGNORE_UNUSED; + + osc->hw.init = &init; + osc->regmap = regmap; + osc->frequency = frequency; + osc->accuracy = accuracy; + + hw = &osc->hw; + ret = clk_hw_register(NULL, hw); + if (ret) { + kfree(osc); + hw = ERR_PTR(ret); + } + + return hw; +} + +static int clk_main_probe_frequency(struct regmap *regmap) +{ + unsigned long prep_time, timeout; + unsigned int mcfr; + + timeout = jiffies + usecs_to_jiffies(MAINFRDY_TIMEOUT); + do { + prep_time = jiffies; + regmap_read(regmap, AT91_CKGR_MCFR, &mcfr); + if (mcfr & AT91_PMC_MAINRDY) + return 0; + if (system_state < SYSTEM_RUNNING) + udelay(MAINF_LOOP_MIN_WAIT); + else + usleep_range(MAINF_LOOP_MIN_WAIT, MAINF_LOOP_MAX_WAIT); + } while (time_before(prep_time, timeout)); + + return -ETIMEDOUT; +} + +static unsigned long clk_main_recalc_rate(struct regmap *regmap, + unsigned long parent_rate) +{ + unsigned int mcfr; + + if (parent_rate) + return parent_rate; + + pr_warn("Main crystal frequency not set, using approximate value\n"); + regmap_read(regmap, AT91_CKGR_MCFR, &mcfr); + if (!(mcfr & AT91_PMC_MAINRDY)) + return 0; + + return ((mcfr & AT91_PMC_MAINF) * SLOW_CLOCK_FREQ) / MAINF_DIV; +} + +static int clk_rm9200_main_prepare(struct clk_hw *hw) +{ + struct clk_rm9200_main *clkmain = to_clk_rm9200_main(hw); + + return clk_main_probe_frequency(clkmain->regmap); +} + +static int clk_rm9200_main_is_prepared(struct clk_hw *hw) +{ + struct clk_rm9200_main *clkmain = to_clk_rm9200_main(hw); + unsigned int status; + + regmap_read(clkmain->regmap, AT91_CKGR_MCFR, &status); + + return !!(status & AT91_PMC_MAINRDY); +} + +static unsigned long clk_rm9200_main_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_rm9200_main *clkmain = to_clk_rm9200_main(hw); + + return clk_main_recalc_rate(clkmain->regmap, parent_rate); +} + +static const struct clk_ops rm9200_main_ops = { + .prepare = clk_rm9200_main_prepare, + .is_prepared = clk_rm9200_main_is_prepared, + .recalc_rate = clk_rm9200_main_recalc_rate, +}; + +struct clk_hw * __init +at91_clk_register_rm9200_main(struct regmap *regmap, + const char *name, + const char *parent_name, + struct clk_hw *parent_hw) +{ + struct clk_rm9200_main *clkmain; + struct clk_init_data init = {}; + struct clk_hw *hw; + int ret; + + if (!name) + return ERR_PTR(-EINVAL); + + if (!(parent_name || parent_hw)) + return ERR_PTR(-EINVAL); + + clkmain = kzalloc_obj(*clkmain); + if (!clkmain) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &rm9200_main_ops; + if (parent_hw) + init.parent_hws = (const struct clk_hw **)&parent_hw; + else + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = 0; + + clkmain->hw.init = &init; + clkmain->regmap = regmap; + + hw = &clkmain->hw; + ret = clk_hw_register(NULL, &clkmain->hw); + if (ret) { + kfree(clkmain); + hw = ERR_PTR(ret); + } + + return hw; +} + +static inline bool clk_sam9x5_main_ready(struct regmap *regmap) +{ + unsigned int status; + + regmap_read(regmap, AT91_PMC_SR, &status); + + return !!(status & AT91_PMC_MOSCSELS); +} + +static int clk_sam9x5_main_prepare(struct clk_hw *hw) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + struct regmap *regmap = clkmain->regmap; + + while (!clk_sam9x5_main_ready(regmap)) + cpu_relax(); + + return clk_main_probe_frequency(regmap); +} + +static int clk_sam9x5_main_is_prepared(struct clk_hw *hw) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + + return clk_sam9x5_main_ready(clkmain->regmap); +} + +static unsigned long clk_sam9x5_main_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + + return clk_main_recalc_rate(clkmain->regmap, parent_rate); +} + +static int clk_sam9x5_main_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + struct regmap *regmap = clkmain->regmap; + unsigned int tmp; + + if (index > 1) + return -EINVAL; + + regmap_read(regmap, AT91_CKGR_MOR, &tmp); + + if (index && !(tmp & AT91_PMC_MOSCSEL)) + tmp = AT91_PMC_MOSCSEL; + else if (!index && (tmp & AT91_PMC_MOSCSEL)) + tmp = 0; + else + return 0; + + regmap_update_bits(regmap, AT91_CKGR_MOR, + AT91_PMC_MOSCSEL | MOR_KEY_MASK, + tmp | AT91_PMC_KEY); + + while (!clk_sam9x5_main_ready(regmap)) + cpu_relax(); + + return 0; +} + +static u8 clk_sam9x5_main_get_parent(struct clk_hw *hw) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + unsigned int status; + + regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status); + + return clk_main_parent_select(status); +} + +static int clk_sam9x5_main_save_context(struct clk_hw *hw) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + + clkmain->pms.status = clk_main_rc_osc_is_prepared(&clkmain->hw); + clkmain->pms.parent = clk_sam9x5_main_get_parent(&clkmain->hw); + + return 0; +} + +static void clk_sam9x5_main_restore_context(struct clk_hw *hw) +{ + struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw); + int ret; + + ret = clk_sam9x5_main_set_parent(hw, clkmain->pms.parent); + if (ret) + return; + + if (clkmain->pms.status) + clk_sam9x5_main_prepare(hw); +} + +static const struct clk_ops sam9x5_main_ops = { + .prepare = clk_sam9x5_main_prepare, + .is_prepared = clk_sam9x5_main_is_prepared, + .recalc_rate = clk_sam9x5_main_recalc_rate, + .determine_rate = clk_hw_determine_rate_no_reparent, + .set_parent = clk_sam9x5_main_set_parent, + .get_parent = clk_sam9x5_main_get_parent, + .save_context = clk_sam9x5_main_save_context, + .restore_context = clk_sam9x5_main_restore_context, +}; + +struct clk_hw * __init +at91_clk_register_sam9x5_main(struct regmap *regmap, + const char *name, + const char **parent_names, + struct clk_hw **parent_hws, + int num_parents) +{ + struct clk_sam9x5_main *clkmain; + struct clk_init_data init = {}; + unsigned int status; + struct clk_hw *hw; + int ret; + + if (!name) + return ERR_PTR(-EINVAL); + + if (!(parent_hws || parent_names) || !num_parents) + return ERR_PTR(-EINVAL); + + clkmain = kzalloc_obj(*clkmain); + if (!clkmain) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &sam9x5_main_ops; + if (parent_hws) + init.parent_hws = (const struct clk_hw **)parent_hws; + else + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = CLK_SET_PARENT_GATE; + + clkmain->hw.init = &init; + clkmain->regmap = regmap; + regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status); + clkmain->parent = clk_main_parent_select(status); + + hw = &clkmain->hw; + ret = clk_hw_register(NULL, &clkmain->hw); + if (ret) { + kfree(clkmain); + hw = ERR_PTR(ret); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c new file mode 100644 index 000000000..05001e770 --- /dev/null +++ b/drivers/clk/at91/clk-master.c @@ -0,0 +1,885 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define MASTER_PRES_MASK 0x7 +#define MASTER_PRES_MAX MASTER_PRES_MASK +#define MASTER_DIV_SHIFT 8 +#define MASTER_DIV_MASK 0x7 + +#define PMC_MCR_CSS_SHIFT (16) + +#define MASTER_MAX_ID 9 + +#define to_clk_master(hw) container_of(hw, struct clk_master, hw) + +struct clk_master { + struct clk_hw hw; + struct regmap *regmap; + spinlock_t *lock; + const struct clk_master_layout *layout; + const struct clk_master_characteristics *characteristics; + struct at91_clk_pms pms; + u32 *mux_table; + u32 mckr; + int chg_pid; + u8 id; + u8 parent; + u8 div; + u32 safe_div; +}; + +/* MCK div reference to be used by notifier. */ +static struct clk_master *master_div; + +static inline bool clk_master_ready(struct clk_master *master) +{ + unsigned int bit = master->id ? AT91_PMC_MCKXRDY : AT91_PMC_MCKRDY; + unsigned int status; + + regmap_read(master->regmap, AT91_PMC_SR, &status); + + return !!(status & bit); +} + +static int clk_master_prepare(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + + spin_lock_irqsave(master->lock, flags); + + while (!clk_master_ready(master)) + cpu_relax(); + + spin_unlock_irqrestore(master->lock, flags); + + return 0; +} + +static int clk_master_is_prepared(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + bool status; + + spin_lock_irqsave(master->lock, flags); + status = clk_master_ready(master); + spin_unlock_irqrestore(master->lock, flags); + + return status; +} + +static unsigned long clk_master_div_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + u8 div; + unsigned long flags, rate = parent_rate; + struct clk_master *master = to_clk_master(hw); + const struct clk_master_layout *layout = master->layout; + const struct clk_master_characteristics *characteristics = + master->characteristics; + unsigned int mckr; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &mckr); + spin_unlock_irqrestore(master->lock, flags); + + mckr &= layout->mask; + + div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + + rate /= characteristics->divisors[div]; + + if (rate < characteristics->output.min) + pr_warn("master clk div is underclocked"); + else if (rate > characteristics->output.max) + pr_warn("master clk div is overclocked"); + + return rate; +} + +static int clk_master_div_save_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + unsigned long flags; + unsigned int mckr, div; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &mckr); + spin_unlock_irqrestore(master->lock, flags); + + mckr &= master->layout->mask; + div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + div = master->characteristics->divisors[div]; + + master->pms.parent_rate = clk_hw_get_rate(parent_hw); + master->pms.rate = DIV_ROUND_CLOSEST(master->pms.parent_rate, div); + + return 0; +} + +static void clk_master_div_restore_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + unsigned int mckr; + u8 div; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &mckr); + spin_unlock_irqrestore(master->lock, flags); + + mckr &= master->layout->mask; + div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + div = master->characteristics->divisors[div]; + + if (div != DIV_ROUND_CLOSEST(master->pms.parent_rate, master->pms.rate)) + pr_warn("MCKR DIV not configured properly by firmware!\n"); +} + +static const struct clk_ops master_div_ops = { + .prepare = clk_master_prepare, + .is_prepared = clk_master_is_prepared, + .recalc_rate = clk_master_div_recalc_rate, + .save_context = clk_master_div_save_context, + .restore_context = clk_master_div_restore_context, +}; + +/* This function must be called with lock acquired. */ +static int clk_master_div_set(struct clk_master *master, + unsigned long parent_rate, int div) +{ + const struct clk_master_characteristics *characteristics = + master->characteristics; + unsigned long rate = parent_rate; + unsigned int max_div = 0, div_index = 0, max_div_index = 0; + unsigned int i, mckr, tmp; + int ret; + + for (i = 0; i < ARRAY_SIZE(characteristics->divisors); i++) { + if (!characteristics->divisors[i]) + break; + + if (div == characteristics->divisors[i]) + div_index = i; + + if (max_div < characteristics->divisors[i]) { + max_div = characteristics->divisors[i]; + max_div_index = i; + } + } + + if (div > max_div) + div_index = max_div_index; + + ret = regmap_read(master->regmap, master->layout->offset, &mckr); + if (ret) + return ret; + + mckr &= master->layout->mask; + tmp = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + if (tmp == div_index) + return 0; + + rate /= characteristics->divisors[div_index]; + if (rate < characteristics->output.min) + pr_warn("master clk div is underclocked"); + else if (rate > characteristics->output.max) + pr_warn("master clk div is overclocked"); + + mckr &= ~(MASTER_DIV_MASK << MASTER_DIV_SHIFT); + mckr |= (div_index << MASTER_DIV_SHIFT); + ret = regmap_write(master->regmap, master->layout->offset, mckr); + if (ret) + return ret; + + while (!clk_master_ready(master)) + cpu_relax(); + + master->div = characteristics->divisors[div_index]; + + return 0; +} + +static unsigned long clk_master_div_recalc_rate_chg(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_master *master = to_clk_master(hw); + + return DIV_ROUND_CLOSEST_ULL(parent_rate, master->div); +} + +static void clk_master_div_restore_context_chg(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + int ret; + + spin_lock_irqsave(master->lock, flags); + ret = clk_master_div_set(master, master->pms.parent_rate, + DIV_ROUND_CLOSEST(master->pms.parent_rate, + master->pms.rate)); + spin_unlock_irqrestore(master->lock, flags); + if (ret) + pr_warn("Failed to restore MCK DIV clock\n"); +} + +static const struct clk_ops master_div_ops_chg = { + .prepare = clk_master_prepare, + .is_prepared = clk_master_is_prepared, + .recalc_rate = clk_master_div_recalc_rate_chg, + .save_context = clk_master_div_save_context, + .restore_context = clk_master_div_restore_context_chg, +}; + +static int clk_master_div_notifier_fn(struct notifier_block *notifier, + unsigned long code, void *data) +{ + const struct clk_master_characteristics *characteristics = + master_div->characteristics; + struct clk_notifier_data *cnd = data; + unsigned long flags, new_parent_rate, new_rate; + unsigned int mckr, div, new_div = 0; + int ret, i; + long tmp_diff; + long best_diff = -1; + + spin_lock_irqsave(master_div->lock, flags); + switch (code) { + case PRE_RATE_CHANGE: + /* + * We want to avoid any overclocking of MCK DIV domain. To do + * this we set a safe divider (the underclocking is not of + * interest as we can go as low as 32KHz). The relation + * b/w this clock and its parents are as follows: + * + * FRAC PLL -> DIV PLL -> MCK DIV + * + * With the proper safe divider we should be good even with FRAC + * PLL at its maximum value. + */ + ret = regmap_read(master_div->regmap, master_div->layout->offset, + &mckr); + if (ret) { + ret = NOTIFY_STOP_MASK; + goto unlock; + } + + mckr &= master_div->layout->mask; + div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + + /* Switch to safe divider. */ + clk_master_div_set(master_div, + cnd->old_rate * characteristics->divisors[div], + master_div->safe_div); + break; + + case POST_RATE_CHANGE: + /* + * At this point we want to restore MCK DIV domain to its maximum + * allowed rate. + */ + ret = regmap_read(master_div->regmap, master_div->layout->offset, + &mckr); + if (ret) { + ret = NOTIFY_STOP_MASK; + goto unlock; + } + + mckr &= master_div->layout->mask; + div = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + new_parent_rate = cnd->new_rate * characteristics->divisors[div]; + + for (i = 0; i < ARRAY_SIZE(characteristics->divisors); i++) { + if (!characteristics->divisors[i]) + break; + + new_rate = DIV_ROUND_CLOSEST_ULL(new_parent_rate, + characteristics->divisors[i]); + + tmp_diff = characteristics->output.max - new_rate; + if (tmp_diff < 0) + continue; + + if (best_diff < 0 || best_diff > tmp_diff) { + new_div = characteristics->divisors[i]; + best_diff = tmp_diff; + } + + if (!tmp_diff) + break; + } + + if (!new_div) { + ret = NOTIFY_STOP_MASK; + goto unlock; + } + + /* Update the div to preserve MCK DIV clock rate. */ + clk_master_div_set(master_div, new_parent_rate, + new_div); + + ret = NOTIFY_OK; + break; + + default: + ret = NOTIFY_DONE; + break; + } + +unlock: + spin_unlock_irqrestore(master_div->lock, flags); + + return ret; +} + +static struct notifier_block clk_master_div_notifier = { + .notifier_call = clk_master_div_notifier_fn, +}; + +static void clk_sama7g5_master_best_diff(struct clk_rate_request *req, + struct clk_hw *parent, + unsigned long parent_rate, + long *best_rate, + long *best_diff, + u32 div) +{ + unsigned long tmp_rate, tmp_diff; + + if (div == MASTER_PRES_MAX) + tmp_rate = parent_rate / 3; + else + tmp_rate = parent_rate >> div; + + tmp_diff = abs(req->rate - tmp_rate); + + if (*best_diff < 0 || *best_diff >= tmp_diff) { + *best_rate = tmp_rate; + *best_diff = tmp_diff; + req->best_parent_rate = parent_rate; + req->best_parent_hw = parent; + } +} + +static unsigned long clk_master_pres_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_master *master = to_clk_master(hw); + const struct clk_master_characteristics *characteristics = + master->characteristics; + unsigned long flags; + unsigned int val, pres; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &val); + spin_unlock_irqrestore(master->lock, flags); + + val &= master->layout->mask; + pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK; + if (pres == MASTER_PRES_MAX && characteristics->have_div3_pres) + pres = 3; + else + pres = (1 << pres); + + return DIV_ROUND_CLOSEST_ULL(parent_rate, pres); +} + +static u8 clk_master_pres_get_parent(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + unsigned int mckr; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &mckr); + spin_unlock_irqrestore(master->lock, flags); + + mckr &= master->layout->mask; + + return mckr & AT91_PMC_CSS; +} + +static int clk_master_pres_save_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + unsigned long flags; + unsigned int val, pres; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &val); + spin_unlock_irqrestore(master->lock, flags); + + val &= master->layout->mask; + pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK; + if (pres == MASTER_PRES_MAX && master->characteristics->have_div3_pres) + pres = 3; + else + pres = (1 << pres); + + master->pms.parent = val & AT91_PMC_CSS; + master->pms.parent_rate = clk_hw_get_rate(parent_hw); + master->pms.rate = DIV_ROUND_CLOSEST_ULL(master->pms.parent_rate, pres); + + return 0; +} + +static void clk_master_pres_restore_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + unsigned int val, pres; + + spin_lock_irqsave(master->lock, flags); + regmap_read(master->regmap, master->layout->offset, &val); + spin_unlock_irqrestore(master->lock, flags); + + val &= master->layout->mask; + pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK; + if (pres == MASTER_PRES_MAX && master->characteristics->have_div3_pres) + pres = 3; + else + pres = (1 << pres); + + if (master->pms.rate != + DIV_ROUND_CLOSEST_ULL(master->pms.parent_rate, pres) || + (master->pms.parent != (val & AT91_PMC_CSS))) + pr_warn("MCKR PRES was not configured properly by firmware!\n"); +} + +static const struct clk_ops master_pres_ops = { + .prepare = clk_master_prepare, + .is_prepared = clk_master_is_prepared, + .recalc_rate = clk_master_pres_recalc_rate, + .get_parent = clk_master_pres_get_parent, + .save_context = clk_master_pres_save_context, + .restore_context = clk_master_pres_restore_context, +}; + +static struct clk_hw * __init +at91_clk_register_master_internal(struct regmap *regmap, + const char *name, int num_parents, + const char **parent_names, + struct clk_hw **parent_hws, + const struct clk_master_layout *layout, + const struct clk_master_characteristics *characteristics, + const struct clk_ops *ops, spinlock_t *lock, u32 flags) +{ + struct clk_master *master; + struct clk_init_data init = {}; + struct clk_hw *hw; + unsigned int mckr; + unsigned long irqflags; + int ret; + + if (!name || !num_parents || !(parent_names || parent_hws) || !lock) + return ERR_PTR(-EINVAL); + + master = kzalloc_obj(*master); + if (!master) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = ops; + if (parent_hws) + init.parent_hws = (const struct clk_hw **)parent_hws; + else + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = flags; + + master->hw.init = &init; + master->layout = layout; + master->characteristics = characteristics; + master->regmap = regmap; + master->lock = lock; + + if (ops == &master_div_ops_chg) { + spin_lock_irqsave(master->lock, irqflags); + regmap_read(master->regmap, master->layout->offset, &mckr); + spin_unlock_irqrestore(master->lock, irqflags); + + mckr &= layout->mask; + mckr = (mckr >> MASTER_DIV_SHIFT) & MASTER_DIV_MASK; + master->div = characteristics->divisors[mckr]; + } + + hw = &master->hw; + ret = clk_hw_register(NULL, &master->hw); + if (ret) { + kfree(master); + hw = ERR_PTR(ret); + } + + return hw; +} + +struct clk_hw * __init +at91_clk_register_master_pres(struct regmap *regmap, + const char *name, int num_parents, + const char **parent_names, + struct clk_hw **parent_hws, + const struct clk_master_layout *layout, + const struct clk_master_characteristics *characteristics, + spinlock_t *lock) +{ + return at91_clk_register_master_internal(regmap, name, num_parents, + parent_names, parent_hws, layout, + characteristics, + &master_pres_ops, + lock, CLK_SET_RATE_GATE); +} + +struct clk_hw * __init +at91_clk_register_master_div(struct regmap *regmap, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, const struct clk_master_layout *layout, + const struct clk_master_characteristics *characteristics, + spinlock_t *lock, u32 flags, u32 safe_div) +{ + const struct clk_ops *ops; + struct clk_hw *hw; + + if (flags & CLK_SET_RATE_GATE) + ops = &master_div_ops; + else + ops = &master_div_ops_chg; + + hw = at91_clk_register_master_internal(regmap, name, 1, + parent_name ? &parent_name : NULL, + parent_hw ? &parent_hw : NULL, layout, + characteristics, ops, + lock, flags); + + if (!IS_ERR(hw) && safe_div) { + master_div = to_clk_master(hw); + master_div->safe_div = safe_div; + clk_notifier_register(hw->clk, + &clk_master_div_notifier); + } + + return hw; +} + +static unsigned long +clk_sama7g5_master_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_master *master = to_clk_master(hw); + + if (master->div == MASTER_PRES_MAX) + return DIV_ROUND_CLOSEST_ULL(parent_rate, 3); + + return DIV_ROUND_CLOSEST_ULL(parent_rate, (1 << master->div)); +} + +static int clk_sama7g5_master_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_master *master = to_clk_master(hw); + struct clk_hw *parent; + long best_rate = LONG_MIN, best_diff = LONG_MIN; + unsigned long parent_rate; + unsigned int div, i; + + /* First: check the dividers of MCR. */ + for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + parent = clk_hw_get_parent_by_index(hw, i); + if (!parent) + continue; + + parent_rate = clk_hw_get_rate(parent); + if (!parent_rate) + continue; + + for (div = 0; div < MASTER_PRES_MAX + 1; div++) { + clk_sama7g5_master_best_diff(req, parent, parent_rate, + &best_rate, &best_diff, + div); + if (!best_diff) + break; + } + + if (!best_diff) + break; + } + + /* Second: try to request rate form changeable parent. */ + if (master->chg_pid < 0) + goto end; + + parent = clk_hw_get_parent_by_index(hw, master->chg_pid); + if (!parent) + goto end; + + for (div = 0; div < MASTER_PRES_MAX + 1; div++) { + struct clk_rate_request req_parent; + unsigned long req_rate; + + if (div == MASTER_PRES_MAX) + req_rate = req->rate * 3; + else + req_rate = req->rate << div; + + clk_hw_forward_rate_request(hw, req, parent, &req_parent, req_rate); + if (__clk_determine_rate(parent, &req_parent)) + continue; + + clk_sama7g5_master_best_diff(req, parent, req_parent.rate, + &best_rate, &best_diff, div); + + if (!best_diff) + break; + } + +end: + pr_debug("MCK: %s, best_rate = %ld, parent clk: %s @ %ld\n", + __func__, best_rate, + __clk_get_name((req->best_parent_hw)->clk), + req->best_parent_rate); + + if (best_rate < 0) + return -EINVAL; + + req->rate = best_rate; + + return 0; +} + +static u8 clk_sama7g5_master_get_parent(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + u8 index; + + spin_lock_irqsave(master->lock, flags); + index = clk_mux_val_to_index(&master->hw, master->mux_table, 0, + master->parent); + spin_unlock_irqrestore(master->lock, flags); + + return index; +} + +static int clk_sama7g5_master_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + + if (index >= clk_hw_get_num_parents(hw)) + return -EINVAL; + + spin_lock_irqsave(master->lock, flags); + master->parent = clk_mux_index_to_val(master->mux_table, 0, index); + spin_unlock_irqrestore(master->lock, flags); + + return 0; +} + +static void clk_sama7g5_master_set(struct clk_master *master, + unsigned int status) +{ + unsigned long flags; + unsigned int val, cparent; + unsigned int enable = status ? AT91_PMC_MCR_V2_EN : 0; + unsigned int parent = master->parent << PMC_MCR_CSS_SHIFT; + unsigned int div = master->div << MASTER_DIV_SHIFT; + + spin_lock_irqsave(master->lock, flags); + + regmap_write(master->regmap, AT91_PMC_MCR_V2, + AT91_PMC_MCR_V2_ID(master->id)); + regmap_read(master->regmap, AT91_PMC_MCR_V2, &val); + regmap_update_bits(master->regmap, AT91_PMC_MCR_V2, + enable | AT91_PMC_MCR_V2_CSS | AT91_PMC_MCR_V2_DIV | + AT91_PMC_MCR_V2_CMD | AT91_PMC_MCR_V2_ID_MSK, + enable | parent | div | AT91_PMC_MCR_V2_CMD | + AT91_PMC_MCR_V2_ID(master->id)); + + cparent = (val & AT91_PMC_MCR_V2_CSS) >> PMC_MCR_CSS_SHIFT; + + /* Wait here only if parent is being changed. */ + while ((cparent != master->parent) && !clk_master_ready(master)) + cpu_relax(); + + spin_unlock_irqrestore(master->lock, flags); +} + +static int clk_sama7g5_master_enable(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + + clk_sama7g5_master_set(master, 1); + + return 0; +} + +static void clk_sama7g5_master_disable(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + + spin_lock_irqsave(master->lock, flags); + + regmap_write(master->regmap, AT91_PMC_MCR_V2, master->id); + regmap_update_bits(master->regmap, AT91_PMC_MCR_V2, + AT91_PMC_MCR_V2_EN | AT91_PMC_MCR_V2_CMD | + AT91_PMC_MCR_V2_ID_MSK, + AT91_PMC_MCR_V2_CMD | + AT91_PMC_MCR_V2_ID(master->id)); + + spin_unlock_irqrestore(master->lock, flags); +} + +static int clk_sama7g5_master_is_enabled(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long flags; + unsigned int val; + + spin_lock_irqsave(master->lock, flags); + + regmap_write(master->regmap, AT91_PMC_MCR_V2, master->id); + regmap_read(master->regmap, AT91_PMC_MCR_V2, &val); + + spin_unlock_irqrestore(master->lock, flags); + + return !!(val & AT91_PMC_MCR_V2_EN); +} + +static int clk_sama7g5_master_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_master *master = to_clk_master(hw); + unsigned long div, flags; + + div = DIV_ROUND_CLOSEST(parent_rate, rate); + if ((div > (1 << (MASTER_PRES_MAX - 1))) || (div & (div - 1))) + return -EINVAL; + + if (div == 3) + div = MASTER_PRES_MAX; + else if (div) + div = ffs(div) - 1; + + spin_lock_irqsave(master->lock, flags); + master->div = div; + spin_unlock_irqrestore(master->lock, flags); + + return 0; +} + +static int clk_sama7g5_master_save_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + + master->pms.status = clk_sama7g5_master_is_enabled(hw); + + return 0; +} + +static void clk_sama7g5_master_restore_context(struct clk_hw *hw) +{ + struct clk_master *master = to_clk_master(hw); + + if (master->pms.status) + clk_sama7g5_master_set(master, master->pms.status); +} + +static const struct clk_ops sama7g5_master_ops = { + .enable = clk_sama7g5_master_enable, + .disable = clk_sama7g5_master_disable, + .is_enabled = clk_sama7g5_master_is_enabled, + .recalc_rate = clk_sama7g5_master_recalc_rate, + .determine_rate = clk_sama7g5_master_determine_rate, + .set_rate = clk_sama7g5_master_set_rate, + .get_parent = clk_sama7g5_master_get_parent, + .set_parent = clk_sama7g5_master_set_parent, + .save_context = clk_sama7g5_master_save_context, + .restore_context = clk_sama7g5_master_restore_context, +}; + +struct clk_hw * __init +at91_clk_sama7g5_register_master(struct regmap *regmap, + const char *name, int num_parents, + const char **parent_names, + struct clk_hw **parent_hws, + u32 *mux_table, + spinlock_t *lock, u8 id, + bool critical, int chg_pid) +{ + struct clk_master *master; + struct clk_hw *hw; + struct clk_init_data init = {}; + unsigned long flags; + unsigned int val; + int ret; + + if (!name || !num_parents || !(parent_names || parent_hws) || !mux_table || + !lock || id > MASTER_MAX_ID) + return ERR_PTR(-EINVAL); + + master = kzalloc_obj(*master); + if (!master) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &sama7g5_master_ops; + if (parent_hws) + init.parent_hws = (const struct clk_hw **)parent_hws; + else + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; + if (chg_pid >= 0) + init.flags |= CLK_SET_RATE_PARENT; + if (critical) + init.flags |= CLK_IS_CRITICAL; + + master->hw.init = &init; + master->regmap = regmap; + master->id = id; + master->chg_pid = chg_pid; + master->lock = lock; + master->mux_table = mux_table; + + spin_lock_irqsave(master->lock, flags); + regmap_write(master->regmap, AT91_PMC_MCR_V2, master->id); + regmap_read(master->regmap, AT91_PMC_MCR_V2, &val); + master->parent = (val & AT91_PMC_MCR_V2_CSS) >> PMC_MCR_CSS_SHIFT; + master->div = (val & AT91_PMC_MCR_V2_DIV) >> MASTER_DIV_SHIFT; + spin_unlock_irqrestore(master->lock, flags); + + hw = &master->hw; + ret = clk_hw_register(NULL, &master->hw); + if (ret) { + kfree(master); + hw = ERR_PTR(ret); + } + + return hw; +} + +const struct clk_master_layout at91rm9200_master_layout = { + .mask = 0x31F, + .pres_shift = 2, + .offset = AT91_PMC_MCKR, +}; + +const struct clk_master_layout at91sam9x5_master_layout = { + .mask = 0x373, + .pres_shift = 4, + .offset = AT91_PMC_MCKR, +}; diff --git a/drivers/clk/at91/clk-peripheral.c b/drivers/clk/at91/clk-peripheral.c new file mode 100644 index 000000000..4946ea0cd --- /dev/null +++ b/drivers/clk/at91/clk-peripheral.c @@ -0,0 +1,514 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/bitfield.h> +#include <linux/bitops.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +DEFINE_SPINLOCK(pmc_pcr_lock); + +#define PERIPHERAL_ID_MIN 2 +#define PERIPHERAL_ID_MAX 31 +#define PERIPHERAL_MASK(id) (1 << ((id) & PERIPHERAL_ID_MAX)) + +#define PERIPHERAL_MAX_SHIFT 3 + +struct clk_peripheral { + struct clk_hw hw; + struct regmap *regmap; + u32 id; +}; + +#define to_clk_peripheral(hw) container_of(hw, struct clk_peripheral, hw) + +struct clk_sam9x5_peripheral { + struct clk_hw hw; + struct regmap *regmap; + struct clk_range range; + spinlock_t *lock; + u32 id; + u32 div; + const struct clk_pcr_layout *layout; + struct at91_clk_pms pms; + bool auto_div; + int chg_pid; +}; + +#define to_clk_sam9x5_peripheral(hw) \ + container_of(hw, struct clk_sam9x5_peripheral, hw) + +static int clk_peripheral_enable(struct clk_hw *hw) +{ + struct clk_peripheral *periph = to_clk_peripheral(hw); + int offset = AT91_PMC_PCER; + u32 id = periph->id; + + if (id < PERIPHERAL_ID_MIN) + return 0; + if (id > PERIPHERAL_ID_MAX) + offset = AT91_PMC_PCER1; + regmap_write(periph->regmap, offset, PERIPHERAL_MASK(id)); + + return 0; +} + +static void clk_peripheral_disable(struct clk_hw *hw) +{ + struct clk_peripheral *periph = to_clk_peripheral(hw); + int offset = AT91_PMC_PCDR; + u32 id = periph->id; + + if (id < PERIPHERAL_ID_MIN) + return; + if (id > PERIPHERAL_ID_MAX) + offset = AT91_PMC_PCDR1; + regmap_write(periph->regmap, offset, PERIPHERAL_MASK(id)); +} + +static int clk_peripheral_is_enabled(struct clk_hw *hw) +{ + struct clk_peripheral *periph = to_clk_peripheral(hw); + int offset = AT91_PMC_PCSR; + unsigned int status; + u32 id = periph->id; + + if (id < PERIPHERAL_ID_MIN) + return 1; + if (id > PERIPHERAL_ID_MAX) + offset = AT91_PMC_PCSR1; + regmap_read(periph->regmap, offset, &status); + + return status & PERIPHERAL_MASK(id) ? 1 : 0; +} + +static const struct clk_ops peripheral_ops = { + .enable = clk_peripheral_enable, + .disable = clk_peripheral_disable, + .is_enabled = clk_peripheral_is_enabled, +}; + +struct clk_hw * __init +at91_clk_register_peripheral(struct regmap *regmap, const char *name, + const char *parent_name, struct clk_hw *parent_hw, + u32 id) +{ + struct clk_peripheral *periph; + struct clk_init_data init = {}; + struct clk_hw *hw; + int ret; + + if (!name || !(parent_name || parent_hw) || id > PERIPHERAL_ID_MAX) + return ERR_PTR(-EINVAL); + + periph = kzalloc_obj(*periph); + if (!periph) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &peripheral_ops; + if (parent_hw) + init.parent_hws = (const struct clk_hw **)&parent_hw; + else + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = 0; + + periph->id = id; + periph->hw.init = &init; + periph->regmap = regmap; + + hw = &periph->hw; + ret = clk_hw_register(NULL, &periph->hw); + if (ret) { + kfree(periph); + hw = ERR_PTR(ret); + } + + return hw; +} + +static void clk_sam9x5_peripheral_autodiv(struct clk_sam9x5_peripheral *periph) +{ + struct clk_hw *parent; + unsigned long parent_rate; + int shift = 0; + + if (!periph->auto_div) + return; + + if (periph->range.max) { + parent = clk_hw_get_parent_by_index(&periph->hw, 0); + parent_rate = clk_hw_get_rate(parent); + if (!parent_rate) + return; + + for (; shift < PERIPHERAL_MAX_SHIFT; shift++) { + if (parent_rate >> shift <= periph->range.max) + break; + } + } + + periph->auto_div = false; + periph->div = shift; +} + +static int clk_sam9x5_peripheral_set(struct clk_sam9x5_peripheral *periph, + unsigned int status) +{ + unsigned long flags; + unsigned int enable = status ? AT91_PMC_PCR_EN : 0; + + if (periph->id < PERIPHERAL_ID_MIN) + return 0; + + spin_lock_irqsave(periph->lock, flags); + regmap_write(periph->regmap, periph->layout->offset, + (periph->id & periph->layout->pid_mask)); + regmap_update_bits(periph->regmap, periph->layout->offset, + periph->layout->div_mask | periph->layout->cmd | + enable, + field_prep(periph->layout->div_mask, periph->div) | + periph->layout->cmd | enable); + spin_unlock_irqrestore(periph->lock, flags); + + return 0; +} + +static int clk_sam9x5_peripheral_enable(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + + return clk_sam9x5_peripheral_set(periph, 1); +} + +static void clk_sam9x5_peripheral_disable(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + unsigned long flags; + + if (periph->id < PERIPHERAL_ID_MIN) + return; + + spin_lock_irqsave(periph->lock, flags); + regmap_write(periph->regmap, periph->layout->offset, + (periph->id & periph->layout->pid_mask)); + regmap_update_bits(periph->regmap, periph->layout->offset, + AT91_PMC_PCR_EN | periph->layout->cmd, + periph->layout->cmd); + spin_unlock_irqrestore(periph->lock, flags); +} + +static int clk_sam9x5_peripheral_is_enabled(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + unsigned long flags; + unsigned int status; + + if (periph->id < PERIPHERAL_ID_MIN) + return 1; + + spin_lock_irqsave(periph->lock, flags); + regmap_write(periph->regmap, periph->layout->offset, + (periph->id & periph->layout->pid_mask)); + regmap_read(periph->regmap, periph->layout->offset, &status); + spin_unlock_irqrestore(periph->lock, flags); + + return !!(status & AT91_PMC_PCR_EN); +} + +static unsigned long +clk_sam9x5_peripheral_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + unsigned long flags; + unsigned int status; + + if (periph->id < PERIPHERAL_ID_MIN) + return parent_rate; + + spin_lock_irqsave(periph->lock, flags); + regmap_write(periph->regmap, periph->layout->offset, + (periph->id & periph->layout->pid_mask)); + regmap_read(periph->regmap, periph->layout->offset, &status); + spin_unlock_irqrestore(periph->lock, flags); + + if (status & AT91_PMC_PCR_EN) { + periph->div = field_get(periph->layout->div_mask, status); + periph->auto_div = false; + } else { + clk_sam9x5_peripheral_autodiv(periph); + } + + return parent_rate >> periph->div; +} + +static void clk_sam9x5_peripheral_best_diff(struct clk_rate_request *req, + struct clk_hw *parent, + unsigned long parent_rate, + u32 shift, long *best_diff, + long *best_rate) +{ + unsigned long tmp_rate = parent_rate >> shift; + unsigned long tmp_diff = abs(req->rate - tmp_rate); + + if (*best_diff < 0 || *best_diff >= tmp_diff) { + *best_rate = tmp_rate; + *best_diff = tmp_diff; + req->best_parent_rate = parent_rate; + req->best_parent_hw = parent; + } +} + +static int clk_sam9x5_peripheral_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + struct clk_hw *parent = clk_hw_get_parent(hw); + unsigned long parent_rate = clk_hw_get_rate(parent); + unsigned long tmp_rate; + long best_rate = LONG_MIN; + long best_diff = LONG_MIN; + u32 shift; + + if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max) { + req->rate = parent_rate; + + return 0; + } + + /* Fist step: check the available dividers. */ + for (shift = 0; shift <= PERIPHERAL_MAX_SHIFT; shift++) { + tmp_rate = parent_rate >> shift; + + if (periph->range.max && tmp_rate > periph->range.max) + continue; + + clk_sam9x5_peripheral_best_diff(req, parent, parent_rate, + shift, &best_diff, &best_rate); + + if (!best_diff || best_rate <= req->rate) + break; + } + + if (periph->chg_pid < 0) + goto end; + + /* Step two: try to request rate from parent. */ + parent = clk_hw_get_parent_by_index(hw, periph->chg_pid); + if (!parent) + goto end; + + for (shift = 0; shift <= PERIPHERAL_MAX_SHIFT; shift++) { + struct clk_rate_request req_parent; + + clk_hw_forward_rate_request(hw, req, parent, &req_parent, req->rate << shift); + if (__clk_determine_rate(parent, &req_parent)) + continue; + + clk_sam9x5_peripheral_best_diff(req, parent, req_parent.rate, + shift, &best_diff, &best_rate); + + if (!best_diff) + break; + } +end: + if (best_rate < 0 || + (periph->range.max && best_rate > periph->range.max)) + return -EINVAL; + + pr_debug("PCK: %s, best_rate = %ld, parent clk: %s @ %ld\n", + __func__, best_rate, + __clk_get_name((req->best_parent_hw)->clk), + req->best_parent_rate); + + req->rate = best_rate; + + return 0; +} + +static int clk_sam9x5_peripheral_no_parent_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + int shift = 0; + unsigned long best_rate; + unsigned long best_diff; + unsigned long cur_rate = req->best_parent_rate; + unsigned long cur_diff; + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + + if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max) { + req->rate = req->best_parent_rate; + + return 0; + } + + if (periph->range.max) { + for (; shift <= PERIPHERAL_MAX_SHIFT; shift++) { + cur_rate = req->best_parent_rate >> shift; + if (cur_rate <= periph->range.max) + break; + } + } + + if (req->rate >= cur_rate) { + req->rate = cur_rate; + + return 0; + } + + best_diff = cur_rate - req->rate; + best_rate = cur_rate; + for (; shift <= PERIPHERAL_MAX_SHIFT; shift++) { + cur_rate = req->best_parent_rate >> shift; + if (cur_rate < req->rate) + cur_diff = req->rate - cur_rate; + else + cur_diff = cur_rate - req->rate; + + if (cur_diff < best_diff) { + best_diff = cur_diff; + best_rate = cur_rate; + } + + if (!best_diff || cur_rate < req->rate) + break; + } + + req->rate = best_rate; + + return 0; +} + +static int clk_sam9x5_peripheral_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + int shift; + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + if (periph->id < PERIPHERAL_ID_MIN || !periph->range.max) { + if (parent_rate == rate) + return 0; + else + return -EINVAL; + } + + if (periph->range.max && rate > periph->range.max) + return -EINVAL; + + for (shift = 0; shift <= PERIPHERAL_MAX_SHIFT; shift++) { + if (parent_rate >> shift == rate) { + periph->auto_div = false; + periph->div = shift; + return 0; + } + } + + return -EINVAL; +} + +static int clk_sam9x5_peripheral_save_context(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + + periph->pms.status = clk_sam9x5_peripheral_is_enabled(hw); + + return 0; +} + +static void clk_sam9x5_peripheral_restore_context(struct clk_hw *hw) +{ + struct clk_sam9x5_peripheral *periph = to_clk_sam9x5_peripheral(hw); + + if (periph->pms.status) + clk_sam9x5_peripheral_set(periph, periph->pms.status); +} + +static const struct clk_ops sam9x5_peripheral_ops = { + .enable = clk_sam9x5_peripheral_enable, + .disable = clk_sam9x5_peripheral_disable, + .is_enabled = clk_sam9x5_peripheral_is_enabled, + .recalc_rate = clk_sam9x5_peripheral_recalc_rate, + .determine_rate = clk_sam9x5_peripheral_no_parent_determine_rate, + .set_rate = clk_sam9x5_peripheral_set_rate, + .save_context = clk_sam9x5_peripheral_save_context, + .restore_context = clk_sam9x5_peripheral_restore_context, +}; + +static const struct clk_ops sam9x5_peripheral_chg_ops = { + .enable = clk_sam9x5_peripheral_enable, + .disable = clk_sam9x5_peripheral_disable, + .is_enabled = clk_sam9x5_peripheral_is_enabled, + .recalc_rate = clk_sam9x5_peripheral_recalc_rate, + .determine_rate = clk_sam9x5_peripheral_determine_rate, + .set_rate = clk_sam9x5_peripheral_set_rate, + .save_context = clk_sam9x5_peripheral_save_context, + .restore_context = clk_sam9x5_peripheral_restore_context, +}; + +struct clk_hw * __init +at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock, + const struct clk_pcr_layout *layout, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, + u32 id, const struct clk_range *range, + int chg_pid, unsigned long flags) +{ + struct clk_sam9x5_peripheral *periph; + struct clk_init_data init = {}; + struct clk_hw *hw; + int ret; + + if (!name || !(parent_name || parent_hw)) + return ERR_PTR(-EINVAL); + + periph = kzalloc_obj(*periph); + if (!periph) + return ERR_PTR(-ENOMEM); + + init.name = name; + if (parent_hw) + init.parent_hws = (const struct clk_hw **)&parent_hw; + else + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = flags; + if (chg_pid < 0) { + init.ops = &sam9x5_peripheral_ops; + } else { + init.flags |= CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT; + init.ops = &sam9x5_peripheral_chg_ops; + } + + periph->id = id; + periph->hw.init = &init; + periph->div = 0; + periph->regmap = regmap; + periph->lock = lock; + if (layout->div_mask) + periph->auto_div = true; + periph->layout = layout; + periph->range = *range; + periph->chg_pid = chg_pid; + + hw = &periph->hw; + ret = clk_hw_register(NULL, &periph->hw); + if (ret) { + kfree(periph); + hw = ERR_PTR(ret); + } else { + clk_sam9x5_peripheral_autodiv(periph); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-pll.c b/drivers/clk/at91/clk-pll.c new file mode 100644 index 000000000..b89f60cf0 --- /dev/null +++ b/drivers/clk/at91/clk-pll.c @@ -0,0 +1,381 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define PLL_STATUS_MASK(id) (1 << (1 + (id))) +#define PLL_REG(id) (AT91_CKGR_PLLAR + ((id) * 4)) +#define PLL_DIV_MASK 0xff +#define PLL_DIV_MAX PLL_DIV_MASK +#define PLL_DIV(reg) ((reg) & PLL_DIV_MASK) +#define PLL_MUL(reg, layout) (((reg) >> (layout)->mul_shift) & \ + (layout)->mul_mask) +#define PLL_MUL_MIN 2 +#define PLL_MUL_MASK(layout) ((layout)->mul_mask) +#define PLL_MUL_MAX(layout) (PLL_MUL_MASK(layout) + 1) +#define PLL_ICPR_SHIFT(id) ((id) * 16) +#define PLL_ICPR_MASK(id) (0xffff << PLL_ICPR_SHIFT(id)) +#define PLL_MAX_COUNT 0x3f +#define PLL_COUNT_SHIFT 8 +#define PLL_OUT_SHIFT 14 +#define PLL_MAX_ID 1 + +#define to_clk_pll(hw) container_of(hw, struct clk_pll, hw) + +struct clk_pll { + struct clk_hw hw; + struct regmap *regmap; + u8 id; + u8 div; + u8 range; + u16 mul; + const struct clk_pll_layout *layout; + const struct clk_pll_characteristics *characteristics; + struct at91_clk_pms pms; +}; + +static inline bool clk_pll_ready(struct regmap *regmap, int id) +{ + unsigned int status; + + regmap_read(regmap, AT91_PMC_SR, &status); + + return status & PLL_STATUS_MASK(id) ? 1 : 0; +} + +static int clk_pll_prepare(struct clk_hw *hw) +{ + struct clk_pll *pll = to_clk_pll(hw); + struct regmap *regmap = pll->regmap; + const struct clk_pll_layout *layout = pll->layout; + const struct clk_pll_characteristics *characteristics = + pll->characteristics; + u8 id = pll->id; + u32 mask = PLL_STATUS_MASK(id); + int offset = PLL_REG(id); + u8 out = 0; + unsigned int pllr; + unsigned int status; + u8 div; + u16 mul; + + regmap_read(regmap, offset, &pllr); + div = PLL_DIV(pllr); + mul = PLL_MUL(pllr, layout); + + regmap_read(regmap, AT91_PMC_SR, &status); + if ((status & mask) && + (div == pll->div && mul == pll->mul)) + return 0; + + if (characteristics->out) + out = characteristics->out[pll->range]; + + if (characteristics->icpll) + regmap_update_bits(regmap, AT91_PMC_PLLICPR, PLL_ICPR_MASK(id), + characteristics->icpll[pll->range] << PLL_ICPR_SHIFT(id)); + + regmap_update_bits(regmap, offset, layout->pllr_mask, + pll->div | (PLL_MAX_COUNT << PLL_COUNT_SHIFT) | + (out << PLL_OUT_SHIFT) | + ((pll->mul & layout->mul_mask) << layout->mul_shift)); + + while (!clk_pll_ready(regmap, pll->id)) + cpu_relax(); + + return 0; +} + +static int clk_pll_is_prepared(struct clk_hw *hw) +{ + struct clk_pll *pll = to_clk_pll(hw); + + return clk_pll_ready(pll->regmap, pll->id); +} + +static void clk_pll_unprepare(struct clk_hw *hw) +{ + struct clk_pll *pll = to_clk_pll(hw); + unsigned int mask = pll->layout->pllr_mask; + + regmap_update_bits(pll->regmap, PLL_REG(pll->id), mask, ~mask); +} + +static unsigned long clk_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_pll *pll = to_clk_pll(hw); + + if (!pll->div || !pll->mul) + return 0; + + return (parent_rate / pll->div) * (pll->mul + 1); +} + +static long clk_pll_get_best_div_mul(struct clk_pll *pll, unsigned long rate, + unsigned long parent_rate, + u32 *div, u32 *mul, + u32 *index) { + const struct clk_pll_layout *layout = pll->layout; + const struct clk_pll_characteristics *characteristics = + pll->characteristics; + unsigned long bestremainder = ULONG_MAX; + unsigned long maxdiv, mindiv, tmpdiv; + long bestrate = -ERANGE; + unsigned long bestdiv; + unsigned long bestmul; + int i = 0; + + /* Check if parent_rate is a valid input rate */ + if (parent_rate < characteristics->input.min) + return -ERANGE; + + /* + * Calculate minimum divider based on the minimum multiplier, the + * parent_rate and the requested rate. + * Should always be 2 according to the input and output characteristics + * of the PLL blocks. + */ + mindiv = (parent_rate * PLL_MUL_MIN) / rate; + if (!mindiv) + mindiv = 1; + + if (parent_rate > characteristics->input.max) { + tmpdiv = DIV_ROUND_UP(parent_rate, characteristics->input.max); + if (tmpdiv > PLL_DIV_MAX) + return -ERANGE; + + if (tmpdiv > mindiv) + mindiv = tmpdiv; + } + + /* + * Calculate the maximum divider which is limited by PLL register + * layout (limited by the MUL or DIV field size). + */ + maxdiv = DIV_ROUND_UP(parent_rate * PLL_MUL_MAX(layout), rate); + if (maxdiv > PLL_DIV_MAX) + maxdiv = PLL_DIV_MAX; + + /* + * Iterate over the acceptable divider values to find the best + * divider/multiplier pair (the one that generates the closest + * rate to the requested one). + */ + for (tmpdiv = mindiv; tmpdiv <= maxdiv; tmpdiv++) { + unsigned long remainder; + unsigned long tmprate; + unsigned long tmpmul; + + /* + * Calculate the multiplier associated with the current + * divider that provide the closest rate to the requested one. + */ + tmpmul = DIV_ROUND_CLOSEST(rate, parent_rate / tmpdiv); + tmprate = (parent_rate / tmpdiv) * tmpmul; + if (tmprate > rate) + remainder = tmprate - rate; + else + remainder = rate - tmprate; + + /* + * Compare the remainder with the best remainder found until + * now and elect a new best multiplier/divider pair if the + * current remainder is smaller than the best one. + */ + if (remainder < bestremainder) { + bestremainder = remainder; + bestdiv = tmpdiv; + bestmul = tmpmul; + bestrate = tmprate; + } + + /* + * We've found a perfect match! + * Stop searching now and use this multiplier/divider pair. + */ + if (!remainder) + break; + } + + /* We haven't found any multiplier/divider pair => return -ERANGE */ + if (bestrate < 0) + return bestrate; + + /* Check if bestrate is a valid output rate */ + for (i = 0; i < characteristics->num_output; i++) { + if (bestrate >= characteristics->output[i].min && + bestrate <= characteristics->output[i].max) + break; + } + + if (i >= characteristics->num_output) + return -ERANGE; + + if (div) + *div = bestdiv; + if (mul) + *mul = bestmul - 1; + if (index) + *index = i; + + return bestrate; +} + +static int clk_pll_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_pll *pll = to_clk_pll(hw); + + req->rate = clk_pll_get_best_div_mul(pll, req->rate, req->best_parent_rate, + NULL, NULL, NULL); + + return 0; +} + +static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_pll *pll = to_clk_pll(hw); + long ret; + u32 div; + u32 mul; + u32 index; + + ret = clk_pll_get_best_div_mul(pll, rate, parent_rate, + &div, &mul, &index); + if (ret < 0) + return ret; + + pll->range = index; + pll->div = div; + pll->mul = mul; + + return 0; +} + +static int clk_pll_save_context(struct clk_hw *hw) +{ + struct clk_pll *pll = to_clk_pll(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + + pll->pms.parent_rate = clk_hw_get_rate(parent_hw); + pll->pms.rate = clk_pll_recalc_rate(&pll->hw, pll->pms.parent_rate); + pll->pms.status = clk_pll_ready(pll->regmap, PLL_REG(pll->id)); + + return 0; +} + +static void clk_pll_restore_context(struct clk_hw *hw) +{ + struct clk_pll *pll = to_clk_pll(hw); + unsigned long calc_rate; + unsigned int pllr, pllr_out, pllr_count; + u8 out = 0; + + if (pll->characteristics->out) + out = pll->characteristics->out[pll->range]; + + regmap_read(pll->regmap, PLL_REG(pll->id), &pllr); + + calc_rate = (pll->pms.parent_rate / PLL_DIV(pllr)) * + (PLL_MUL(pllr, pll->layout) + 1); + pllr_count = (pllr >> PLL_COUNT_SHIFT) & PLL_MAX_COUNT; + pllr_out = (pllr >> PLL_OUT_SHIFT) & out; + + if (pll->pms.rate != calc_rate || + pll->pms.status != clk_pll_ready(pll->regmap, PLL_REG(pll->id)) || + pllr_count != PLL_MAX_COUNT || + (out && pllr_out != out)) + pr_warn("PLLAR was not configured properly by firmware\n"); +} + +static const struct clk_ops pll_ops = { + .prepare = clk_pll_prepare, + .unprepare = clk_pll_unprepare, + .is_prepared = clk_pll_is_prepared, + .recalc_rate = clk_pll_recalc_rate, + .determine_rate = clk_pll_determine_rate, + .set_rate = clk_pll_set_rate, + .save_context = clk_pll_save_context, + .restore_context = clk_pll_restore_context, +}; + +struct clk_hw * __init +at91_clk_register_pll(struct regmap *regmap, const char *name, + const char *parent_name, u8 id, + const struct clk_pll_layout *layout, + const struct clk_pll_characteristics *characteristics) +{ + struct clk_pll *pll; + struct clk_hw *hw; + struct clk_init_data init; + int offset = PLL_REG(id); + unsigned int pllr; + int ret; + + if (id > PLL_MAX_ID) + return ERR_PTR(-EINVAL); + + pll = kzalloc_obj(*pll); + if (!pll) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &pll_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_SET_RATE_GATE; + + pll->id = id; + pll->hw.init = &init; + pll->layout = layout; + pll->characteristics = characteristics; + pll->regmap = regmap; + regmap_read(regmap, offset, &pllr); + pll->div = PLL_DIV(pllr); + pll->mul = PLL_MUL(pllr, layout); + + hw = &pll->hw; + ret = clk_hw_register(NULL, &pll->hw); + if (ret) { + kfree(pll); + hw = ERR_PTR(ret); + } + + return hw; +} + + +const struct clk_pll_layout at91rm9200_pll_layout = { + .pllr_mask = 0x7FFFFFF, + .mul_shift = 16, + .mul_mask = 0x7FF, +}; + +const struct clk_pll_layout at91sam9g45_pll_layout = { + .pllr_mask = 0xFFFFFF, + .mul_shift = 16, + .mul_mask = 0xFF, +}; + +const struct clk_pll_layout at91sam9g20_pllb_layout = { + .pllr_mask = 0x3FFFFF, + .mul_shift = 16, + .mul_mask = 0x3F, +}; + +const struct clk_pll_layout sama5d3_pll_layout = { + .pllr_mask = 0x1FFFFFF, + .mul_shift = 18, + .mul_mask = 0x7F, +}; diff --git a/drivers/clk/at91/clk-plldiv.c b/drivers/clk/at91/clk-plldiv.c new file mode 100644 index 000000000..5f93aead0 --- /dev/null +++ b/drivers/clk/at91/clk-plldiv.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define to_clk_plldiv(hw) container_of(hw, struct clk_plldiv, hw) + +struct clk_plldiv { + struct clk_hw hw; + struct regmap *regmap; +}; + +static unsigned long clk_plldiv_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_plldiv *plldiv = to_clk_plldiv(hw); + unsigned int mckr; + + regmap_read(plldiv->regmap, AT91_PMC_MCKR, &mckr); + + if (mckr & AT91_PMC_PLLADIV2) + return parent_rate / 2; + + return parent_rate; +} + +static int clk_plldiv_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + unsigned long div; + + if (req->rate > req->best_parent_rate) { + req->rate = req->best_parent_rate; + + return 0; + } + + div = req->best_parent_rate / 2; + if (req->rate < div) { + req->rate = div; + + return 0; + } + + if (req->rate - div < req->best_parent_rate - req->rate) { + req->rate = div; + + return 0; + } + + req->rate = req->best_parent_rate; + + return 0; +} + +static int clk_plldiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_plldiv *plldiv = to_clk_plldiv(hw); + + if ((parent_rate != rate) && (parent_rate / 2 != rate)) + return -EINVAL; + + regmap_update_bits(plldiv->regmap, AT91_PMC_MCKR, AT91_PMC_PLLADIV2, + parent_rate != rate ? AT91_PMC_PLLADIV2 : 0); + + return 0; +} + +static const struct clk_ops plldiv_ops = { + .recalc_rate = clk_plldiv_recalc_rate, + .determine_rate = clk_plldiv_determine_rate, + .set_rate = clk_plldiv_set_rate, +}; + +struct clk_hw * __init +at91_clk_register_plldiv(struct regmap *regmap, const char *name, + const char *parent_name) +{ + struct clk_plldiv *plldiv; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + plldiv = kzalloc_obj(*plldiv); + if (!plldiv) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &plldiv_ops; + init.parent_names = parent_name ? &parent_name : NULL; + init.num_parents = parent_name ? 1 : 0; + init.flags = CLK_SET_RATE_GATE; + + plldiv->hw.init = &init; + plldiv->regmap = regmap; + + hw = &plldiv->hw; + ret = clk_hw_register(NULL, &plldiv->hw); + if (ret) { + kfree(plldiv); + hw = ERR_PTR(ret); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-programmable.c b/drivers/clk/at91/clk-programmable.c new file mode 100644 index 000000000..bfd8b03b0 --- /dev/null +++ b/drivers/clk/at91/clk-programmable.c @@ -0,0 +1,281 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define PROG_ID_MAX 7 + +#define PROG_STATUS_MASK(id) (1 << ((id) + 8)) +#define PROG_PRES(layout, pckr) ((pckr >> layout->pres_shift) & layout->pres_mask) +#define PROG_MAX_RM9200_CSS 3 + +struct clk_programmable { + struct clk_hw hw; + struct regmap *regmap; + u32 *mux_table; + u8 id; + const struct clk_programmable_layout *layout; + struct at91_clk_pms pms; +}; + +#define to_clk_programmable(hw) container_of(hw, struct clk_programmable, hw) + +static unsigned long clk_programmable_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + const struct clk_programmable_layout *layout = prog->layout; + unsigned int pckr; + unsigned long rate; + + regmap_read(prog->regmap, AT91_PMC_PCKR(prog->id), &pckr); + + if (layout->is_pres_direct) + rate = parent_rate / (PROG_PRES(layout, pckr) + 1); + else + rate = parent_rate >> PROG_PRES(layout, pckr); + + return rate; +} + +static int clk_programmable_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + const struct clk_programmable_layout *layout = prog->layout; + struct clk_hw *parent; + long best_rate = -EINVAL; + unsigned long parent_rate; + unsigned long tmp_rate = 0; + int shift; + int i; + + for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + parent = clk_hw_get_parent_by_index(hw, i); + if (!parent) + continue; + + parent_rate = clk_hw_get_rate(parent); + if (layout->is_pres_direct) { + for (shift = 0; shift <= layout->pres_mask; shift++) { + tmp_rate = parent_rate / (shift + 1); + if (tmp_rate <= req->rate) + break; + } + } else { + for (shift = 0; shift < layout->pres_mask; shift++) { + tmp_rate = parent_rate >> shift; + if (tmp_rate <= req->rate) + break; + } + } + + if (tmp_rate > req->rate) + continue; + + if (best_rate < 0 || + (req->rate - tmp_rate) < (req->rate - best_rate)) { + best_rate = tmp_rate; + req->best_parent_rate = parent_rate; + req->best_parent_hw = parent; + } + + if (!best_rate) + break; + } + + if (best_rate < 0) + return best_rate; + + req->rate = best_rate; + return 0; +} + +static int clk_programmable_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + const struct clk_programmable_layout *layout = prog->layout; + unsigned int mask = layout->css_mask; + unsigned int pckr = index; + + if (layout->have_slck_mck) + mask |= AT91_PMC_CSSMCK_MCK; + + if (prog->mux_table) + pckr = clk_mux_index_to_val(prog->mux_table, 0, index); + + if (index > layout->css_mask) { + if (index > PROG_MAX_RM9200_CSS && !layout->have_slck_mck) + return -EINVAL; + + pckr |= AT91_PMC_CSSMCK_MCK; + } + + regmap_update_bits(prog->regmap, AT91_PMC_PCKR(prog->id), mask, pckr); + + return 0; +} + +static u8 clk_programmable_get_parent(struct clk_hw *hw) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + const struct clk_programmable_layout *layout = prog->layout; + unsigned int pckr; + u8 ret; + + regmap_read(prog->regmap, AT91_PMC_PCKR(prog->id), &pckr); + + ret = pckr & layout->css_mask; + + if (layout->have_slck_mck && (pckr & AT91_PMC_CSSMCK_MCK) && !ret) + ret = PROG_MAX_RM9200_CSS + 1; + + if (prog->mux_table) + ret = clk_mux_val_to_index(&prog->hw, prog->mux_table, 0, ret); + + return ret; +} + +static int clk_programmable_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + const struct clk_programmable_layout *layout = prog->layout; + unsigned long div = parent_rate / rate; + int shift = 0; + + if (!div) + return -EINVAL; + + if (layout->is_pres_direct) { + shift = div - 1; + + if (shift > layout->pres_mask) + return -EINVAL; + } else { + shift = fls(div) - 1; + + if (div != (1 << shift)) + return -EINVAL; + + if (shift >= layout->pres_mask) + return -EINVAL; + } + + regmap_update_bits(prog->regmap, AT91_PMC_PCKR(prog->id), + layout->pres_mask << layout->pres_shift, + shift << layout->pres_shift); + + return 0; +} + +static int clk_programmable_save_context(struct clk_hw *hw) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + + prog->pms.parent = clk_programmable_get_parent(hw); + prog->pms.parent_rate = clk_hw_get_rate(parent_hw); + prog->pms.rate = clk_programmable_recalc_rate(hw, prog->pms.parent_rate); + + return 0; +} + +static void clk_programmable_restore_context(struct clk_hw *hw) +{ + struct clk_programmable *prog = to_clk_programmable(hw); + int ret; + + ret = clk_programmable_set_parent(hw, prog->pms.parent); + if (ret) + return; + + clk_programmable_set_rate(hw, prog->pms.rate, prog->pms.parent_rate); +} + +static const struct clk_ops programmable_ops = { + .recalc_rate = clk_programmable_recalc_rate, + .determine_rate = clk_programmable_determine_rate, + .get_parent = clk_programmable_get_parent, + .set_parent = clk_programmable_set_parent, + .set_rate = clk_programmable_set_rate, + .save_context = clk_programmable_save_context, + .restore_context = clk_programmable_restore_context, +}; + +struct clk_hw * __init +at91_clk_register_programmable(struct regmap *regmap, + const char *name, const char **parent_names, + struct clk_hw **parent_hws, u8 num_parents, u8 id, + const struct clk_programmable_layout *layout, + u32 *mux_table) +{ + struct clk_programmable *prog; + struct clk_hw *hw; + struct clk_init_data init = {}; + int ret; + + if (id > PROG_ID_MAX || !(parent_names || parent_hws)) + return ERR_PTR(-EINVAL); + + prog = kzalloc_obj(*prog); + if (!prog) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &programmable_ops; + if (parent_hws) + init.parent_hws = (const struct clk_hw **)parent_hws; + else + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; + + prog->id = id; + prog->layout = layout; + prog->hw.init = &init; + prog->regmap = regmap; + prog->mux_table = mux_table; + + hw = &prog->hw; + ret = clk_hw_register(NULL, &prog->hw); + if (ret) { + kfree(prog); + hw = ERR_PTR(ret); + } + + return hw; +} + +const struct clk_programmable_layout at91rm9200_programmable_layout = { + .pres_mask = 0x7, + .pres_shift = 2, + .css_mask = 0x3, + .have_slck_mck = 0, + .is_pres_direct = 0, +}; + +const struct clk_programmable_layout at91sam9g45_programmable_layout = { + .pres_mask = 0x7, + .pres_shift = 2, + .css_mask = 0x3, + .have_slck_mck = 1, + .is_pres_direct = 0, +}; + +const struct clk_programmable_layout at91sam9x5_programmable_layout = { + .pres_mask = 0x7, + .pres_shift = 4, + .css_mask = 0x7, + .have_slck_mck = 0, + .is_pres_direct = 0, +}; diff --git a/drivers/clk/at91/clk-sam9x60-pll.c b/drivers/clk/at91/clk-sam9x60-pll.c new file mode 100644 index 000000000..9d9b5adec --- /dev/null +++ b/drivers/clk/at91/clk-sam9x60-pll.c @@ -0,0 +1,796 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Microchip Technology Inc. + * + */ + +#include <linux/bitfield.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define PMC_PLL_CTRL0_DIV_MSK GENMASK(7, 0) +#define PMC_PLL_CTRL1_MUL_MSK GENMASK(31, 24) +#define PMC_PLL_CTRL1_FRACR_MSK GENMASK(21, 0) + +#define PLL_DIV_MAX (FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, UINT_MAX) + 1) +#define UPLL_DIV 2 +#define PLL_MUL_MAX (FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, UINT_MAX) + 1) + +#define PLL_MAX_ID 9 + +struct sam9x60_pll_core { + struct regmap *regmap; + spinlock_t *lock; + const struct clk_pll_characteristics *characteristics; + const struct clk_pll_layout *layout; + struct clk_hw hw; + u8 id; +}; + +struct sam9x60_frac { + struct sam9x60_pll_core core; + struct at91_clk_pms pms; + u32 frac; + u16 mul; +}; + +struct sam9x60_div { + struct sam9x60_pll_core core; + struct at91_clk_pms pms; + u8 div; + u8 safe_div; +}; + +#define to_sam9x60_pll_core(hw) container_of(hw, struct sam9x60_pll_core, hw) +#define to_sam9x60_frac(core) container_of(core, struct sam9x60_frac, core) +#define to_sam9x60_div(core) container_of(core, struct sam9x60_div, core) + +static struct sam9x60_div *notifier_div; + +static inline bool sam9x60_pll_ready(struct regmap *regmap, int id) +{ + unsigned int status; + + regmap_read(regmap, AT91_PMC_PLL_ISR0, &status); + + return !!(status & BIT(id)); +} + +static bool sam9x60_frac_pll_ready(struct regmap *regmap, u8 id) +{ + return sam9x60_pll_ready(regmap, id); +} + +static unsigned long sam9x60_frac_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_frac *frac = to_sam9x60_frac(core); + unsigned long freq; + + freq = parent_rate * (frac->mul + 1) + + DIV_ROUND_CLOSEST_ULL((u64)parent_rate * frac->frac, (1 << 22)); + + if (core->layout->div2) + freq >>= 1; + + return freq; +} + +static int sam9x60_frac_pll_set(struct sam9x60_pll_core *core) +{ + struct sam9x60_frac *frac = to_sam9x60_frac(core); + struct regmap *regmap = core->regmap; + unsigned int val, cfrac, cmul; + unsigned long flags; + + spin_lock_irqsave(core->lock, flags); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_ID_MSK, core->id); + regmap_read(regmap, AT91_PMC_PLL_CTRL1, &val); + cmul = (val & core->layout->mul_mask) >> core->layout->mul_shift; + cfrac = (val & core->layout->frac_mask) >> core->layout->frac_shift; + + if (sam9x60_frac_pll_ready(regmap, core->id) && + (cmul == frac->mul && cfrac == frac->frac)) + goto unlock; + + /* Load recommended value for PMC_PLL_ACR */ + val = core->characteristics->acr; + regmap_write(regmap, AT91_PMC_PLL_ACR, val); + + regmap_write(regmap, AT91_PMC_PLL_CTRL1, + (frac->mul << core->layout->mul_shift) | + (frac->frac << core->layout->frac_shift)); + + if (core->characteristics->upll) { + /* Enable the UTMI internal bandgap */ + val |= AT91_PMC_PLL_ACR_UTMIBG; + regmap_write(regmap, AT91_PMC_PLL_ACR, val); + + udelay(10); + + /* Enable the UTMI internal regulator */ + val |= AT91_PMC_PLL_ACR_UTMIVR; + regmap_write(regmap, AT91_PMC_PLL_ACR, val); + + udelay(10); + } + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_UPDATE | AT91_PMC_PLL_UPDT_ID_MSK, + AT91_PMC_PLL_UPDT_UPDATE | core->id); + + regmap_update_bits(regmap, AT91_PMC_PLL_CTRL0, + AT91_PMC_PLL_CTRL0_ENLOCK | AT91_PMC_PLL_CTRL0_ENPLL, + AT91_PMC_PLL_CTRL0_ENLOCK | AT91_PMC_PLL_CTRL0_ENPLL); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_UPDATE | AT91_PMC_PLL_UPDT_ID_MSK, + AT91_PMC_PLL_UPDT_UPDATE | core->id); + + while (!sam9x60_pll_ready(regmap, core->id)) + cpu_relax(); + +unlock: + spin_unlock_irqrestore(core->lock, flags); + + return 0; +} + +static int sam9x60_frac_pll_prepare(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + return sam9x60_frac_pll_set(core); +} + +static void sam9x60_frac_pll_unprepare(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct regmap *regmap = core->regmap; + unsigned long flags; + + spin_lock_irqsave(core->lock, flags); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_ID_MSK, core->id); + + regmap_update_bits(regmap, AT91_PMC_PLL_CTRL0, AT91_PMC_PLL_CTRL0_ENPLL, 0); + + if (core->characteristics->upll) + regmap_update_bits(regmap, AT91_PMC_PLL_ACR, + AT91_PMC_PLL_ACR_UTMIBG | AT91_PMC_PLL_ACR_UTMIVR, 0); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_UPDATE | AT91_PMC_PLL_UPDT_ID_MSK, + AT91_PMC_PLL_UPDT_UPDATE | core->id); + + spin_unlock_irqrestore(core->lock, flags); +} + +static int sam9x60_frac_pll_is_prepared(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + return sam9x60_pll_ready(core->regmap, core->id); +} + +static long sam9x60_frac_pll_compute_mul_frac(struct sam9x60_pll_core *core, + unsigned long rate, + unsigned long parent_rate, + bool update) +{ + struct sam9x60_frac *frac = to_sam9x60_frac(core); + unsigned long tmprate, remainder; + unsigned long nmul = 0; + unsigned long nfrac = 0; + + if (rate < core->characteristics->core_output[0].min || + rate > core->characteristics->core_output[0].max) + return -ERANGE; + + /* + * Calculate the multiplier associated with the current + * divider that provide the closest rate to the requested one. + */ + nmul = mult_frac(rate, 1, parent_rate); + tmprate = mult_frac(parent_rate, nmul, 1); + remainder = rate - tmprate; + + if (remainder) { + nfrac = DIV_ROUND_CLOSEST_ULL((u64)remainder * (1 << 22), + parent_rate); + + tmprate += DIV_ROUND_CLOSEST_ULL((u64)nfrac * parent_rate, + (1 << 22)); + } + + /* Check if resulted rate is a valid. */ + if (tmprate < core->characteristics->core_output[0].min || + tmprate > core->characteristics->core_output[0].max) + return -ERANGE; + + if (update) { + frac->mul = nmul - 1; + frac->frac = nfrac; + } + + return tmprate; +} + +static int sam9x60_frac_pll_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + req->rate = sam9x60_frac_pll_compute_mul_frac(core, req->rate, + req->best_parent_rate, + false); + + return 0; +} + +static int sam9x60_frac_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + return sam9x60_frac_pll_compute_mul_frac(core, rate, parent_rate, true); +} + +static int sam9x60_frac_pll_set_rate_chg(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_frac *frac = to_sam9x60_frac(core); + struct regmap *regmap = core->regmap; + unsigned long irqflags; + unsigned int val, cfrac, cmul; + long ret; + + ret = sam9x60_frac_pll_compute_mul_frac(core, rate, parent_rate, true); + if (ret <= 0) + return ret; + + spin_lock_irqsave(core->lock, irqflags); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, AT91_PMC_PLL_UPDT_ID_MSK, + core->id); + regmap_read(regmap, AT91_PMC_PLL_CTRL1, &val); + cmul = (val & core->layout->mul_mask) >> core->layout->mul_shift; + cfrac = (val & core->layout->frac_mask) >> core->layout->frac_shift; + + if (cmul == frac->mul && cfrac == frac->frac) + goto unlock; + + regmap_write(regmap, AT91_PMC_PLL_CTRL1, + (frac->mul << core->layout->mul_shift) | + (frac->frac << core->layout->frac_shift)); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_UPDATE | AT91_PMC_PLL_UPDT_ID_MSK, + AT91_PMC_PLL_UPDT_UPDATE | core->id); + + regmap_update_bits(regmap, AT91_PMC_PLL_CTRL0, + AT91_PMC_PLL_CTRL0_ENLOCK | AT91_PMC_PLL_CTRL0_ENPLL, + AT91_PMC_PLL_CTRL0_ENLOCK | + AT91_PMC_PLL_CTRL0_ENPLL); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_UPDATE | AT91_PMC_PLL_UPDT_ID_MSK, + AT91_PMC_PLL_UPDT_UPDATE | core->id); + + while (!sam9x60_pll_ready(regmap, core->id)) + cpu_relax(); + +unlock: + spin_unlock_irqrestore(core->lock, irqflags); + + return ret; +} + +static int sam9x60_frac_pll_save_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_frac *frac = to_sam9x60_frac(core); + + frac->pms.status = sam9x60_pll_ready(core->regmap, core->id); + + return 0; +} + +static void sam9x60_frac_pll_restore_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_frac *frac = to_sam9x60_frac(core); + + if (frac->pms.status) + sam9x60_frac_pll_set(core); +} + +static const struct clk_ops sam9x60_frac_pll_ops = { + .prepare = sam9x60_frac_pll_prepare, + .unprepare = sam9x60_frac_pll_unprepare, + .is_prepared = sam9x60_frac_pll_is_prepared, + .recalc_rate = sam9x60_frac_pll_recalc_rate, + .determine_rate = sam9x60_frac_pll_determine_rate, + .set_rate = sam9x60_frac_pll_set_rate, + .save_context = sam9x60_frac_pll_save_context, + .restore_context = sam9x60_frac_pll_restore_context, +}; + +static const struct clk_ops sam9x60_frac_pll_ops_chg = { + .prepare = sam9x60_frac_pll_prepare, + .unprepare = sam9x60_frac_pll_unprepare, + .is_prepared = sam9x60_frac_pll_is_prepared, + .recalc_rate = sam9x60_frac_pll_recalc_rate, + .determine_rate = sam9x60_frac_pll_determine_rate, + .set_rate = sam9x60_frac_pll_set_rate_chg, + .save_context = sam9x60_frac_pll_save_context, + .restore_context = sam9x60_frac_pll_restore_context, +}; + +/* This function should be called with spinlock acquired. + * Warning: this function must be called only if the same PLL ID was set in + * PLL_UPDT register previously. + */ +static void sam9x60_div_pll_set_div(struct sam9x60_pll_core *core, u32 div, + bool enable) +{ + struct regmap *regmap = core->regmap; + u32 ena_msk = enable ? core->layout->endiv_mask : 0; + u32 ena_val = enable ? (1 << core->layout->endiv_shift) : 0; + + regmap_update_bits(regmap, AT91_PMC_PLL_CTRL0, + core->layout->div_mask | ena_msk, + (div << core->layout->div_shift) | ena_val); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_UPDATE | AT91_PMC_PLL_UPDT_ID_MSK, + AT91_PMC_PLL_UPDT_UPDATE | core->id); + + while (!sam9x60_pll_ready(regmap, core->id)) + cpu_relax(); +} + +static int sam9x60_div_pll_set(struct sam9x60_pll_core *core) +{ + struct sam9x60_div *div = to_sam9x60_div(core); + struct regmap *regmap = core->regmap; + unsigned long flags; + unsigned int val, cdiv; + + spin_lock_irqsave(core->lock, flags); + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_ID_MSK, core->id); + regmap_read(regmap, AT91_PMC_PLL_CTRL0, &val); + cdiv = (val & core->layout->div_mask) >> core->layout->div_shift; + + /* Stop if enabled an nothing changed. */ + if (!!(val & core->layout->endiv_mask) && cdiv == div->div) + goto unlock; + + sam9x60_div_pll_set_div(core, div->div, 1); + +unlock: + spin_unlock_irqrestore(core->lock, flags); + + return 0; +} + +static int sam9x60_div_pll_prepare(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + return sam9x60_div_pll_set(core); +} + +static void sam9x60_div_pll_unprepare(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct regmap *regmap = core->regmap; + unsigned long flags; + + spin_lock_irqsave(core->lock, flags); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_ID_MSK, core->id); + + regmap_update_bits(regmap, AT91_PMC_PLL_CTRL0, + core->layout->endiv_mask, 0); + + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_UPDATE | AT91_PMC_PLL_UPDT_ID_MSK, + AT91_PMC_PLL_UPDT_UPDATE | core->id); + + spin_unlock_irqrestore(core->lock, flags); +} + +static int sam9x60_div_pll_is_prepared(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct regmap *regmap = core->regmap; + unsigned long flags; + unsigned int val; + + spin_lock_irqsave(core->lock, flags); + + regmap_update_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_ID_MSK, core->id); + regmap_read(regmap, AT91_PMC_PLL_CTRL0, &val); + + spin_unlock_irqrestore(core->lock, flags); + + return !!(val & core->layout->endiv_mask); +} + +static unsigned long sam9x60_div_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_div *div = to_sam9x60_div(core); + + return DIV_ROUND_CLOSEST_ULL(parent_rate, (div->div + 1)); +} + +static unsigned long sam9x60_fixed_div_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return parent_rate >> 1; +} + +static long sam9x60_div_pll_compute_div(struct sam9x60_pll_core *core, + unsigned long *parent_rate, + unsigned long rate) +{ + const struct clk_pll_characteristics *characteristics = + core->characteristics; + struct clk_hw *parent = clk_hw_get_parent(&core->hw); + unsigned long tmp_rate, tmp_parent_rate, tmp_diff; + long best_diff = -1, best_rate = -EINVAL; + u32 divid; + + if (!rate) + return 0; + + if (rate < characteristics->output[0].min || + rate > characteristics->output[0].max) + return -ERANGE; + + for (divid = 1; divid < core->layout->div_mask; divid++) { + tmp_parent_rate = clk_hw_round_rate(parent, rate * divid); + if (!tmp_parent_rate) + continue; + + tmp_rate = DIV_ROUND_CLOSEST_ULL(tmp_parent_rate, divid); + tmp_diff = abs(rate - tmp_rate); + + if (best_diff < 0 || best_diff > tmp_diff) { + *parent_rate = tmp_parent_rate; + best_rate = tmp_rate; + best_diff = tmp_diff; + } + + if (!best_diff) + break; + } + + if (best_rate < characteristics->output[0].min || + best_rate > characteristics->output[0].max) + return -ERANGE; + + return best_rate; +} + +static int sam9x60_div_pll_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + + req->rate = sam9x60_div_pll_compute_div(core, &req->best_parent_rate, + req->rate); + + return 0; +} + +static int sam9x60_div_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_div *div = to_sam9x60_div(core); + + div->div = DIV_ROUND_CLOSEST(parent_rate, rate) - 1; + + return 0; +} + +static int sam9x60_div_pll_set_rate_chg(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_div *div = to_sam9x60_div(core); + struct regmap *regmap = core->regmap; + unsigned long irqflags; + unsigned int val, cdiv; + + div->div = DIV_ROUND_CLOSEST(parent_rate, rate) - 1; + + spin_lock_irqsave(core->lock, irqflags); + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, AT91_PMC_PLL_UPDT_ID_MSK, + core->id); + regmap_read(regmap, AT91_PMC_PLL_CTRL0, &val); + cdiv = (val & core->layout->div_mask) >> core->layout->div_shift; + + /* Stop if nothing changed. */ + if (cdiv == div->div) + goto unlock; + + sam9x60_div_pll_set_div(core, div->div, 0); + +unlock: + spin_unlock_irqrestore(core->lock, irqflags); + + return 0; +} + +static int sam9x60_div_pll_save_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_div *div = to_sam9x60_div(core); + + div->pms.status = sam9x60_div_pll_is_prepared(hw); + + return 0; +} + +static void sam9x60_div_pll_restore_context(struct clk_hw *hw) +{ + struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw); + struct sam9x60_div *div = to_sam9x60_div(core); + + if (div->pms.status) + sam9x60_div_pll_set(core); +} + +static int sam9x60_div_pll_notifier_fn(struct notifier_block *notifier, + unsigned long code, void *data) +{ + struct sam9x60_div *div = notifier_div; + struct sam9x60_pll_core core = div->core; + struct regmap *regmap = core.regmap; + unsigned long irqflags; + u32 val, cdiv; + int ret = NOTIFY_DONE; + + if (code != PRE_RATE_CHANGE) + return ret; + + /* + * We switch to safe divider to avoid overclocking of other domains + * feed by us while the frac PLL (our parent) is changed. + */ + div->div = div->safe_div; + + spin_lock_irqsave(core.lock, irqflags); + regmap_write_bits(regmap, AT91_PMC_PLL_UPDT, AT91_PMC_PLL_UPDT_ID_MSK, + core.id); + regmap_read(regmap, AT91_PMC_PLL_CTRL0, &val); + cdiv = (val & core.layout->div_mask) >> core.layout->div_shift; + + /* Stop if nothing changed. */ + if (cdiv == div->safe_div) + goto unlock; + + sam9x60_div_pll_set_div(&core, div->div, 0); + ret = NOTIFY_OK; + +unlock: + spin_unlock_irqrestore(core.lock, irqflags); + + return ret; +} + +static struct notifier_block sam9x60_div_pll_notifier = { + .notifier_call = sam9x60_div_pll_notifier_fn, +}; + +static const struct clk_ops sam9x60_div_pll_ops = { + .prepare = sam9x60_div_pll_prepare, + .unprepare = sam9x60_div_pll_unprepare, + .is_prepared = sam9x60_div_pll_is_prepared, + .recalc_rate = sam9x60_div_pll_recalc_rate, + .determine_rate = sam9x60_div_pll_determine_rate, + .set_rate = sam9x60_div_pll_set_rate, + .save_context = sam9x60_div_pll_save_context, + .restore_context = sam9x60_div_pll_restore_context, +}; + +static const struct clk_ops sam9x60_div_pll_ops_chg = { + .prepare = sam9x60_div_pll_prepare, + .unprepare = sam9x60_div_pll_unprepare, + .is_prepared = sam9x60_div_pll_is_prepared, + .recalc_rate = sam9x60_div_pll_recalc_rate, + .determine_rate = sam9x60_div_pll_determine_rate, + .set_rate = sam9x60_div_pll_set_rate_chg, + .save_context = sam9x60_div_pll_save_context, + .restore_context = sam9x60_div_pll_restore_context, +}; + +static const struct clk_ops sam9x60_fixed_div_pll_ops = { + .prepare = sam9x60_div_pll_prepare, + .unprepare = sam9x60_div_pll_unprepare, + .is_prepared = sam9x60_div_pll_is_prepared, + .recalc_rate = sam9x60_fixed_div_pll_recalc_rate, + .determine_rate = sam9x60_div_pll_determine_rate, + .save_context = sam9x60_div_pll_save_context, + .restore_context = sam9x60_div_pll_restore_context, +}; + +struct clk_hw * __init +sam9x60_clk_register_frac_pll(struct regmap *regmap, spinlock_t *lock, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, u8 id, + const struct clk_pll_characteristics *characteristics, + const struct clk_pll_layout *layout, u32 flags) +{ + struct sam9x60_frac *frac; + struct clk_hw *hw; + struct clk_init_data init = {}; + unsigned long parent_rate, irqflags; + unsigned int val; + int ret; + + if (id > PLL_MAX_ID || !lock || !parent_hw) + return ERR_PTR(-EINVAL); + + frac = kzalloc_obj(*frac); + if (!frac) + return ERR_PTR(-ENOMEM); + + init.name = name; + if (parent_name) + init.parent_names = &parent_name; + else + init.parent_hws = (const struct clk_hw **)&parent_hw; + init.num_parents = 1; + if (flags & CLK_SET_RATE_GATE) + init.ops = &sam9x60_frac_pll_ops; + else + init.ops = &sam9x60_frac_pll_ops_chg; + + init.flags = flags; + + frac->core.id = id; + frac->core.hw.init = &init; + frac->core.characteristics = characteristics; + frac->core.layout = layout; + frac->core.regmap = regmap; + frac->core.lock = lock; + + spin_lock_irqsave(frac->core.lock, irqflags); + if (sam9x60_pll_ready(regmap, id)) { + regmap_update_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_ID_MSK, id); + regmap_read(regmap, AT91_PMC_PLL_CTRL1, &val); + frac->mul = FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, val); + frac->frac = FIELD_GET(PMC_PLL_CTRL1_FRACR_MSK, val); + } else { + /* + * This means the PLL is not setup by bootloaders. In this + * case we need to set the minimum rate for it. Otherwise + * a clock child of this PLL may be enabled before setting + * its rate leading to enabling this PLL with unsupported + * rate. This will lead to PLL not being locked at all. + */ + parent_rate = clk_hw_get_rate(parent_hw); + if (!parent_rate) { + hw = ERR_PTR(-EINVAL); + goto free; + } + + ret = sam9x60_frac_pll_compute_mul_frac(&frac->core, + characteristics->core_output[0].min, + parent_rate, true); + if (ret < 0) { + hw = ERR_PTR(ret); + goto free; + } + } + spin_unlock_irqrestore(frac->core.lock, irqflags); + + hw = &frac->core.hw; + ret = clk_hw_register(NULL, hw); + if (ret) { + kfree(frac); + hw = ERR_PTR(ret); + } + + return hw; + +free: + spin_unlock_irqrestore(frac->core.lock, irqflags); + kfree(frac); + return hw; +} + +struct clk_hw * __init +sam9x60_clk_register_div_pll(struct regmap *regmap, spinlock_t *lock, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, u8 id, + const struct clk_pll_characteristics *characteristics, + const struct clk_pll_layout *layout, u32 flags, + u32 safe_div) +{ + struct sam9x60_div *div; + struct clk_hw *hw; + struct clk_init_data init = {}; + unsigned long irqflags; + unsigned int val; + int ret; + + /* We only support one changeable PLL. */ + if (id > PLL_MAX_ID || !lock || (safe_div && notifier_div)) + return ERR_PTR(-EINVAL); + + if (safe_div >= PLL_DIV_MAX) + safe_div = PLL_DIV_MAX - 1; + + div = kzalloc_obj(*div); + if (!div) + return ERR_PTR(-ENOMEM); + + init.name = name; + if (parent_hw) + init.parent_hws = (const struct clk_hw **)&parent_hw; + else + init.parent_names = &parent_name; + init.num_parents = 1; + + if (layout->div2) + init.ops = &sam9x60_fixed_div_pll_ops; + else if (flags & CLK_SET_RATE_GATE) + init.ops = &sam9x60_div_pll_ops; + else + init.ops = &sam9x60_div_pll_ops_chg; + + init.flags = flags; + + div->core.id = id; + div->core.hw.init = &init; + div->core.characteristics = characteristics; + div->core.layout = layout; + div->core.regmap = regmap; + div->core.lock = lock; + div->safe_div = safe_div; + + spin_lock_irqsave(div->core.lock, irqflags); + + regmap_update_bits(regmap, AT91_PMC_PLL_UPDT, + AT91_PMC_PLL_UPDT_ID_MSK, id); + regmap_read(regmap, AT91_PMC_PLL_CTRL0, &val); + div->div = FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, val); + + spin_unlock_irqrestore(div->core.lock, irqflags); + + hw = &div->core.hw; + ret = clk_hw_register(NULL, hw); + if (ret) { + kfree(div); + hw = ERR_PTR(ret); + } else if (div->safe_div) { + notifier_div = div; + clk_notifier_register(hw->clk, &sam9x60_div_pll_notifier); + } + + return hw; +} + diff --git a/drivers/clk/at91/clk-slow.c b/drivers/clk/at91/clk-slow.c new file mode 100644 index 000000000..f0cad50e4 --- /dev/null +++ b/drivers/clk/at91/clk-slow.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * drivers/clk/at91/clk-slow.c + * + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +struct clk_sam9260_slow { + struct clk_hw hw; + struct regmap *regmap; +}; + +#define to_clk_sam9260_slow(hw) container_of(hw, struct clk_sam9260_slow, hw) + +static u8 clk_sam9260_slow_get_parent(struct clk_hw *hw) +{ + struct clk_sam9260_slow *slowck = to_clk_sam9260_slow(hw); + unsigned int status; + + regmap_read(slowck->regmap, AT91_PMC_SR, &status); + + return status & AT91_PMC_OSCSEL ? 1 : 0; +} + +static const struct clk_ops sam9260_slow_ops = { + .get_parent = clk_sam9260_slow_get_parent, +}; + +struct clk_hw * __init +at91_clk_register_sam9260_slow(struct regmap *regmap, + const char *name, + const char **parent_names, + int num_parents) +{ + struct clk_sam9260_slow *slowck; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + if (!name) + return ERR_PTR(-EINVAL); + + if (!parent_names || !num_parents) + return ERR_PTR(-EINVAL); + + slowck = kzalloc_obj(*slowck); + if (!slowck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &sam9260_slow_ops; + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = 0; + + slowck->hw.init = &init; + slowck->regmap = regmap; + + hw = &slowck->hw; + ret = clk_hw_register(NULL, &slowck->hw); + if (ret) { + kfree(slowck); + hw = ERR_PTR(ret); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-smd.c b/drivers/clk/at91/clk-smd.c new file mode 100644 index 000000000..77f2b8fe6 --- /dev/null +++ b/drivers/clk/at91/clk-smd.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define SMD_DIV_SHIFT 8 +#define SMD_MAX_DIV 0xf + +struct at91sam9x5_clk_smd { + struct clk_hw hw; + struct regmap *regmap; +}; + +#define to_at91sam9x5_clk_smd(hw) \ + container_of(hw, struct at91sam9x5_clk_smd, hw) + +static unsigned long at91sam9x5_clk_smd_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw); + unsigned int smdr; + u8 smddiv; + + regmap_read(smd->regmap, AT91_PMC_SMD, &smdr); + smddiv = (smdr & AT91_PMC_SMD_DIV) >> SMD_DIV_SHIFT; + + return parent_rate / (smddiv + 1); +} + +static int at91sam9x5_clk_smd_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + unsigned long div; + unsigned long bestrate; + unsigned long tmp; + + if (req->rate >= req->best_parent_rate) { + req->rate = req->best_parent_rate; + return 0; + } + + div = req->best_parent_rate / req->rate; + if (div > SMD_MAX_DIV) { + req->rate = req->best_parent_rate / (SMD_MAX_DIV + 1); + return 0; + } + + bestrate = req->best_parent_rate / div; + tmp = req->best_parent_rate / (div + 1); + if (bestrate - req->rate > req->rate - tmp) + bestrate = tmp; + + req->rate = bestrate; + return 0; +} + +static int at91sam9x5_clk_smd_set_parent(struct clk_hw *hw, u8 index) +{ + struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw); + + if (index > 1) + return -EINVAL; + + regmap_update_bits(smd->regmap, AT91_PMC_SMD, AT91_PMC_SMDS, + index ? AT91_PMC_SMDS : 0); + + return 0; +} + +static u8 at91sam9x5_clk_smd_get_parent(struct clk_hw *hw) +{ + struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw); + unsigned int smdr; + + regmap_read(smd->regmap, AT91_PMC_SMD, &smdr); + + return smdr & AT91_PMC_SMDS; +} + +static int at91sam9x5_clk_smd_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct at91sam9x5_clk_smd *smd = to_at91sam9x5_clk_smd(hw); + unsigned long div = parent_rate / rate; + + if (parent_rate % rate || div < 1 || div > (SMD_MAX_DIV + 1)) + return -EINVAL; + + regmap_update_bits(smd->regmap, AT91_PMC_SMD, AT91_PMC_SMD_DIV, + (div - 1) << SMD_DIV_SHIFT); + + return 0; +} + +static const struct clk_ops at91sam9x5_smd_ops = { + .recalc_rate = at91sam9x5_clk_smd_recalc_rate, + .determine_rate = at91sam9x5_clk_smd_determine_rate, + .get_parent = at91sam9x5_clk_smd_get_parent, + .set_parent = at91sam9x5_clk_smd_set_parent, + .set_rate = at91sam9x5_clk_smd_set_rate, +}; + +struct clk_hw * __init +at91sam9x5_clk_register_smd(struct regmap *regmap, const char *name, + const char **parent_names, u8 num_parents) +{ + struct at91sam9x5_clk_smd *smd; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + smd = kzalloc_obj(*smd); + if (!smd) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &at91sam9x5_smd_ops; + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; + + smd->hw.init = &init; + smd->regmap = regmap; + + hw = &smd->hw; + ret = clk_hw_register(NULL, &smd->hw); + if (ret) { + kfree(smd); + hw = ERR_PTR(ret); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c new file mode 100644 index 000000000..93e1e8ceb --- /dev/null +++ b/drivers/clk/at91/clk-system.c @@ -0,0 +1,144 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define SYSTEM_MAX_ID 31 + +#define SYSTEM_MAX_NAME_SZ 32 + +#define to_clk_system(hw) container_of(hw, struct clk_system, hw) +struct clk_system { + struct clk_hw hw; + struct regmap *regmap; + struct at91_clk_pms pms; + u8 id; +}; + +static inline int is_pck(int id) +{ + return (id >= 8) && (id <= 15); +} + +static inline bool clk_system_ready(struct regmap *regmap, int id) +{ + unsigned int status; + + regmap_read(regmap, AT91_PMC_SR, &status); + + return !!(status & (1 << id)); +} + +static int clk_system_prepare(struct clk_hw *hw) +{ + struct clk_system *sys = to_clk_system(hw); + + regmap_write(sys->regmap, AT91_PMC_SCER, 1 << sys->id); + + if (!is_pck(sys->id)) + return 0; + + while (!clk_system_ready(sys->regmap, sys->id)) + cpu_relax(); + + return 0; +} + +static void clk_system_unprepare(struct clk_hw *hw) +{ + struct clk_system *sys = to_clk_system(hw); + + regmap_write(sys->regmap, AT91_PMC_SCDR, 1 << sys->id); +} + +static int clk_system_is_prepared(struct clk_hw *hw) +{ + struct clk_system *sys = to_clk_system(hw); + unsigned int status; + + regmap_read(sys->regmap, AT91_PMC_SCSR, &status); + + if (!(status & (1 << sys->id))) + return 0; + + if (!is_pck(sys->id)) + return 1; + + regmap_read(sys->regmap, AT91_PMC_SR, &status); + + return !!(status & (1 << sys->id)); +} + +static int clk_system_save_context(struct clk_hw *hw) +{ + struct clk_system *sys = to_clk_system(hw); + + sys->pms.status = clk_system_is_prepared(hw); + + return 0; +} + +static void clk_system_restore_context(struct clk_hw *hw) +{ + struct clk_system *sys = to_clk_system(hw); + + if (sys->pms.status) + clk_system_prepare(&sys->hw); +} + +static const struct clk_ops system_ops = { + .prepare = clk_system_prepare, + .unprepare = clk_system_unprepare, + .is_prepared = clk_system_is_prepared, + .save_context = clk_system_save_context, + .restore_context = clk_system_restore_context, +}; + +struct clk_hw * __init +at91_clk_register_system(struct regmap *regmap, const char *name, + const char *parent_name, struct clk_hw *parent_hw, u8 id, + unsigned long flags) +{ + struct clk_system *sys; + struct clk_hw *hw; + struct clk_init_data init = {}; + int ret; + + if (!(parent_name || parent_hw) || id > SYSTEM_MAX_ID) + return ERR_PTR(-EINVAL); + + sys = kzalloc_obj(*sys); + if (!sys) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &system_ops; + if (parent_hw) + init.parent_hws = (const struct clk_hw **)&parent_hw; + else + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_SET_RATE_PARENT | flags; + + sys->id = id; + sys->hw.init = &init; + sys->regmap = regmap; + + hw = &sys->hw; + ret = clk_hw_register(NULL, &sys->hw); + if (ret) { + kfree(sys); + hw = ERR_PTR(ret); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c new file mode 100644 index 000000000..b4dc86193 --- /dev/null +++ b/drivers/clk/at91/clk-usb.c @@ -0,0 +1,424 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include "pmc.h" + +#define SAM9X5_USB_DIV_SHIFT 8 +#define SAM9X5_USB_MAX_DIV 0xf + +#define RM9200_USB_DIV_SHIFT 28 +#define RM9200_USB_DIV_TAB_SIZE 4 + +#define SAM9X5_USBS_MASK GENMASK(0, 0) +#define SAM9X60_USBS_MASK GENMASK(1, 0) + +struct at91sam9x5_clk_usb { + struct clk_hw hw; + struct regmap *regmap; + struct at91_clk_pms pms; + u32 usbs_mask; + u8 num_parents; +}; + +#define to_at91sam9x5_clk_usb(hw) \ + container_of(hw, struct at91sam9x5_clk_usb, hw) + +struct at91rm9200_clk_usb { + struct clk_hw hw; + struct regmap *regmap; + u32 divisors[4]; +}; + +#define to_at91rm9200_clk_usb(hw) \ + container_of(hw, struct at91rm9200_clk_usb, hw) + +static unsigned long at91sam9x5_clk_usb_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + unsigned int usbr; + u8 usbdiv; + + regmap_read(usb->regmap, AT91_PMC_USB, &usbr); + usbdiv = (usbr & AT91_PMC_OHCIUSBDIV) >> SAM9X5_USB_DIV_SHIFT; + + return DIV_ROUND_CLOSEST(parent_rate, (usbdiv + 1)); +} + +static int at91sam9x5_clk_usb_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_hw *parent; + long best_rate = -EINVAL; + unsigned long tmp_rate; + int best_diff = -1; + int tmp_diff; + int i; + + for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + int div; + + parent = clk_hw_get_parent_by_index(hw, i); + if (!parent) + continue; + + for (div = 1; div < SAM9X5_USB_MAX_DIV + 2; div++) { + unsigned long tmp_parent_rate; + + tmp_parent_rate = req->rate * div; + tmp_parent_rate = clk_hw_round_rate(parent, + tmp_parent_rate); + if (!tmp_parent_rate) + continue; + + tmp_rate = DIV_ROUND_CLOSEST(tmp_parent_rate, div); + if (tmp_rate < req->rate) + tmp_diff = req->rate - tmp_rate; + else + tmp_diff = tmp_rate - req->rate; + + if (best_diff < 0 || best_diff > tmp_diff) { + best_rate = tmp_rate; + best_diff = tmp_diff; + req->best_parent_rate = tmp_parent_rate; + req->best_parent_hw = parent; + } + + if (!best_diff || tmp_rate < req->rate) + break; + } + + if (!best_diff) + break; + } + + if (best_rate < 0) + return best_rate; + + req->rate = best_rate; + return 0; +} + +static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + + if (index >= usb->num_parents) + return -EINVAL; + + regmap_update_bits(usb->regmap, AT91_PMC_USB, usb->usbs_mask, index); + + return 0; +} + +static u8 at91sam9x5_clk_usb_get_parent(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + unsigned int usbr; + + regmap_read(usb->regmap, AT91_PMC_USB, &usbr); + + return usbr & usb->usbs_mask; +} + +static int at91sam9x5_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + unsigned long div; + + if (!rate) + return -EINVAL; + + div = DIV_ROUND_CLOSEST(parent_rate, rate); + if (div > SAM9X5_USB_MAX_DIV + 1 || !div) + return -EINVAL; + + regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_OHCIUSBDIV, + (div - 1) << SAM9X5_USB_DIV_SHIFT); + + return 0; +} + +static int at91sam9x5_usb_save_context(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + struct clk_hw *parent_hw = clk_hw_get_parent(hw); + + usb->pms.parent = at91sam9x5_clk_usb_get_parent(hw); + usb->pms.parent_rate = clk_hw_get_rate(parent_hw); + usb->pms.rate = at91sam9x5_clk_usb_recalc_rate(hw, usb->pms.parent_rate); + + return 0; +} + +static void at91sam9x5_usb_restore_context(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + int ret; + + ret = at91sam9x5_clk_usb_set_parent(hw, usb->pms.parent); + if (ret) + return; + + at91sam9x5_clk_usb_set_rate(hw, usb->pms.rate, usb->pms.parent_rate); +} + +static const struct clk_ops at91sam9x5_usb_ops = { + .recalc_rate = at91sam9x5_clk_usb_recalc_rate, + .determine_rate = at91sam9x5_clk_usb_determine_rate, + .get_parent = at91sam9x5_clk_usb_get_parent, + .set_parent = at91sam9x5_clk_usb_set_parent, + .set_rate = at91sam9x5_clk_usb_set_rate, + .save_context = at91sam9x5_usb_save_context, + .restore_context = at91sam9x5_usb_restore_context, +}; + +static int at91sam9n12_clk_usb_enable(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + + regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS, + AT91_PMC_USBS); + + return 0; +} + +static void at91sam9n12_clk_usb_disable(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + + regmap_update_bits(usb->regmap, AT91_PMC_USB, AT91_PMC_USBS, 0); +} + +static int at91sam9n12_clk_usb_is_enabled(struct clk_hw *hw) +{ + struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw); + unsigned int usbr; + + regmap_read(usb->regmap, AT91_PMC_USB, &usbr); + + return usbr & AT91_PMC_USBS; +} + +static const struct clk_ops at91sam9n12_usb_ops = { + .enable = at91sam9n12_clk_usb_enable, + .disable = at91sam9n12_clk_usb_disable, + .is_enabled = at91sam9n12_clk_usb_is_enabled, + .recalc_rate = at91sam9x5_clk_usb_recalc_rate, + .determine_rate = at91sam9x5_clk_usb_determine_rate, + .set_rate = at91sam9x5_clk_usb_set_rate, +}; + +static struct clk_hw * __init +_at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name, + const char **parent_names, u8 num_parents, + u32 usbs_mask) +{ + struct at91sam9x5_clk_usb *usb; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + usb = kzalloc_obj(*usb); + if (!usb) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &at91sam9x5_usb_ops; + init.parent_names = parent_names; + init.num_parents = num_parents; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT; + + usb->hw.init = &init; + usb->regmap = regmap; + usb->usbs_mask = usbs_mask; + usb->num_parents = num_parents; + + hw = &usb->hw; + ret = clk_hw_register(NULL, &usb->hw); + if (ret) { + kfree(usb); + hw = ERR_PTR(ret); + } + + return hw; +} + +struct clk_hw * __init +at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name, + const char **parent_names, u8 num_parents) +{ + return _at91sam9x5_clk_register_usb(regmap, name, parent_names, + num_parents, SAM9X5_USBS_MASK); +} + +struct clk_hw * __init +sam9x60_clk_register_usb(struct regmap *regmap, const char *name, + const char **parent_names, u8 num_parents) +{ + return _at91sam9x5_clk_register_usb(regmap, name, parent_names, + num_parents, SAM9X60_USBS_MASK); +} + +struct clk_hw * __init +at91sam9n12_clk_register_usb(struct regmap *regmap, const char *name, + const char *parent_name) +{ + struct at91sam9x5_clk_usb *usb; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + usb = kzalloc_obj(*usb); + if (!usb) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &at91sam9n12_usb_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_SET_RATE_GATE | CLK_SET_RATE_PARENT; + + usb->hw.init = &init; + usb->regmap = regmap; + + hw = &usb->hw; + ret = clk_hw_register(NULL, &usb->hw); + if (ret) { + kfree(usb); + hw = ERR_PTR(ret); + } + + return hw; +} + +static unsigned long at91rm9200_clk_usb_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw); + unsigned int pllbr; + u8 usbdiv; + + regmap_read(usb->regmap, AT91_CKGR_PLLBR, &pllbr); + + usbdiv = (pllbr & AT91_PMC_USBDIV) >> RM9200_USB_DIV_SHIFT; + if (usb->divisors[usbdiv]) + return parent_rate / usb->divisors[usbdiv]; + + return 0; +} + +static int at91rm9200_clk_usb_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw); + struct clk_hw *parent = clk_hw_get_parent(hw); + unsigned long bestrate = 0; + int bestdiff = -1; + unsigned long tmprate; + int tmpdiff; + int i = 0; + + for (i = 0; i < RM9200_USB_DIV_TAB_SIZE; i++) { + unsigned long tmp_parent_rate; + + if (!usb->divisors[i]) + continue; + + tmp_parent_rate = req->rate * usb->divisors[i]; + tmp_parent_rate = clk_hw_round_rate(parent, tmp_parent_rate); + tmprate = DIV_ROUND_CLOSEST(tmp_parent_rate, usb->divisors[i]); + if (tmprate < req->rate) + tmpdiff = req->rate - tmprate; + else + tmpdiff = tmprate - req->rate; + + if (bestdiff < 0 || bestdiff > tmpdiff) { + bestrate = tmprate; + bestdiff = tmpdiff; + req->best_parent_rate = tmp_parent_rate; + } + + if (!bestdiff) + break; + } + + req->rate = bestrate; + + return 0; +} + +static int at91rm9200_clk_usb_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + int i; + struct at91rm9200_clk_usb *usb = to_at91rm9200_clk_usb(hw); + unsigned long div; + + if (!rate) + return -EINVAL; + + div = DIV_ROUND_CLOSEST(parent_rate, rate); + + for (i = 0; i < RM9200_USB_DIV_TAB_SIZE; i++) { + if (usb->divisors[i] == div) { + regmap_update_bits(usb->regmap, AT91_CKGR_PLLBR, + AT91_PMC_USBDIV, + i << RM9200_USB_DIV_SHIFT); + + return 0; + } + } + + return -EINVAL; +} + +static const struct clk_ops at91rm9200_usb_ops = { + .recalc_rate = at91rm9200_clk_usb_recalc_rate, + .determine_rate = at91rm9200_clk_usb_determine_rate, + .set_rate = at91rm9200_clk_usb_set_rate, +}; + +struct clk_hw * __init +at91rm9200_clk_register_usb(struct regmap *regmap, const char *name, + const char *parent_name, const u32 *divisors) +{ + struct at91rm9200_clk_usb *usb; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + usb = kzalloc_obj(*usb); + if (!usb) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &at91rm9200_usb_ops; + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = CLK_SET_RATE_PARENT; + + usb->hw.init = &init; + usb->regmap = regmap; + memcpy(usb->divisors, divisors, sizeof(usb->divisors)); + + hw = &usb->hw; + ret = clk_hw_register(NULL, &usb->hw); + if (ret) { + kfree(usb); + hw = ERR_PTR(ret); + } + + return hw; +} diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c new file mode 100644 index 000000000..40b335b01 --- /dev/null +++ b/drivers/clk/at91/clk-utmi.c @@ -0,0 +1,294 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <soc/at91/atmel-sfr.h> + +#include "pmc.h" + +/* + * The purpose of this clock is to generate a 480 MHz signal. A different + * rate can't be configured. + */ +#define UTMI_RATE 480000000 + +struct clk_utmi { + struct clk_hw hw; + struct regmap *regmap_pmc; + struct regmap *regmap_sfr; + struct at91_clk_pms pms; +}; + +#define to_clk_utmi(hw) container_of(hw, struct clk_utmi, hw) + +static inline bool clk_utmi_ready(struct regmap *regmap) +{ + unsigned int status; + + regmap_read(regmap, AT91_PMC_SR, &status); + + return status & AT91_PMC_LOCKU; +} + +static int clk_utmi_prepare(struct clk_hw *hw) +{ + struct clk_hw *hw_parent; + struct clk_utmi *utmi = to_clk_utmi(hw); + unsigned int uckr = AT91_PMC_UPLLEN | AT91_PMC_UPLLCOUNT | + AT91_PMC_BIASEN; + unsigned int utmi_ref_clk_freq; + unsigned long parent_rate; + + /* + * If mainck rate is different from 12 MHz, we have to configure the + * FREQ field of the SFR_UTMICKTRIM register to generate properly + * the utmi clock. + */ + hw_parent = clk_hw_get_parent(hw); + parent_rate = clk_hw_get_rate(hw_parent); + + switch (parent_rate) { + case 12000000: + utmi_ref_clk_freq = 0; + break; + case 16000000: + utmi_ref_clk_freq = 1; + break; + case 24000000: + utmi_ref_clk_freq = 2; + break; + /* + * Not supported on SAMA5D2 but it's not an issue since MAINCK + * maximum value is 24 MHz. + */ + case 48000000: + utmi_ref_clk_freq = 3; + break; + default: + pr_err("UTMICK: unsupported mainck rate\n"); + return -EINVAL; + } + + if (utmi->regmap_sfr) { + regmap_update_bits(utmi->regmap_sfr, AT91_SFR_UTMICKTRIM, + AT91_UTMICKTRIM_FREQ, utmi_ref_clk_freq); + } else if (utmi_ref_clk_freq) { + pr_err("UTMICK: sfr node required\n"); + return -EINVAL; + } + + regmap_update_bits(utmi->regmap_pmc, AT91_CKGR_UCKR, uckr, uckr); + + while (!clk_utmi_ready(utmi->regmap_pmc)) + cpu_relax(); + + return 0; +} + +static int clk_utmi_is_prepared(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + return clk_utmi_ready(utmi->regmap_pmc); +} + +static void clk_utmi_unprepare(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + regmap_update_bits(utmi->regmap_pmc, AT91_CKGR_UCKR, + AT91_PMC_UPLLEN, 0); +} + +static unsigned long clk_utmi_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + /* UTMI clk rate is fixed. */ + return UTMI_RATE; +} + +static int clk_utmi_save_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + utmi->pms.status = clk_utmi_is_prepared(hw); + + return 0; +} + +static void clk_utmi_restore_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + if (utmi->pms.status) + clk_utmi_prepare(hw); +} + +static const struct clk_ops utmi_ops = { + .prepare = clk_utmi_prepare, + .unprepare = clk_utmi_unprepare, + .is_prepared = clk_utmi_is_prepared, + .recalc_rate = clk_utmi_recalc_rate, + .save_context = clk_utmi_save_context, + .restore_context = clk_utmi_restore_context, +}; + +static struct clk_hw * __init +at91_clk_register_utmi_internal(struct regmap *regmap_pmc, + struct regmap *regmap_sfr, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, + const struct clk_ops *ops, unsigned long flags) +{ + struct clk_utmi *utmi; + struct clk_hw *hw; + struct clk_init_data init = {}; + int ret; + + if (!(parent_name || parent_hw)) + return ERR_PTR(-EINVAL); + + utmi = kzalloc_obj(*utmi); + if (!utmi) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = ops; + if (parent_hw) + init.parent_hws = (const struct clk_hw **)&parent_hw; + else + init.parent_names = &parent_name; + init.num_parents = 1; + init.flags = flags; + + utmi->hw.init = &init; + utmi->regmap_pmc = regmap_pmc; + utmi->regmap_sfr = regmap_sfr; + + hw = &utmi->hw; + ret = clk_hw_register(NULL, &utmi->hw); + if (ret) { + kfree(utmi); + hw = ERR_PTR(ret); + } + + return hw; +} + +struct clk_hw * __init +at91_clk_register_utmi(struct regmap *regmap_pmc, struct regmap *regmap_sfr, + const char *name, const char *parent_name, + struct clk_hw *parent_hw) +{ + return at91_clk_register_utmi_internal(regmap_pmc, regmap_sfr, name, + parent_name, parent_hw, &utmi_ops, CLK_SET_RATE_GATE); +} + +static int clk_utmi_sama7g5_prepare(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + struct clk_hw *hw_parent; + unsigned long parent_rate; + unsigned int val; + + hw_parent = clk_hw_get_parent(hw); + parent_rate = clk_hw_get_rate(hw_parent); + + switch (parent_rate) { + case 16000000: + val = 0; + break; + case 20000000: + val = 2; + break; + case 24000000: + val = 3; + break; + case 32000000: + val = 5; + break; + default: + pr_err("UTMICK: unsupported main_xtal rate\n"); + return -EINVAL; + } + + regmap_write(utmi->regmap_pmc, AT91_PMC_XTALF, val); + + return 0; + +} + +static int clk_utmi_sama7g5_is_prepared(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + struct clk_hw *hw_parent; + unsigned long parent_rate; + unsigned int val; + + hw_parent = clk_hw_get_parent(hw); + parent_rate = clk_hw_get_rate(hw_parent); + + regmap_read(utmi->regmap_pmc, AT91_PMC_XTALF, &val); + switch (val & 0x7) { + case 0: + if (parent_rate == 16000000) + return 1; + break; + case 2: + if (parent_rate == 20000000) + return 1; + break; + case 3: + if (parent_rate == 24000000) + return 1; + break; + case 5: + if (parent_rate == 32000000) + return 1; + break; + default: + break; + } + + return 0; +} + +static int clk_utmi_sama7g5_save_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + utmi->pms.status = clk_utmi_sama7g5_is_prepared(hw); + + return 0; +} + +static void clk_utmi_sama7g5_restore_context(struct clk_hw *hw) +{ + struct clk_utmi *utmi = to_clk_utmi(hw); + + if (utmi->pms.status) + clk_utmi_sama7g5_prepare(hw); +} + +static const struct clk_ops sama7g5_utmi_ops = { + .prepare = clk_utmi_sama7g5_prepare, + .is_prepared = clk_utmi_sama7g5_is_prepared, + .recalc_rate = clk_utmi_recalc_rate, + .save_context = clk_utmi_sama7g5_save_context, + .restore_context = clk_utmi_sama7g5_restore_context, +}; + +struct clk_hw * __init +at91_clk_sama7g5_register_utmi(struct regmap *regmap_pmc, const char *name, + const char *parent_name, struct clk_hw *parent_hw) +{ + return at91_clk_register_utmi_internal(regmap_pmc, NULL, name, + parent_name, parent_hw, &sama7g5_utmi_ops, 0); +} diff --git a/drivers/clk/at91/dt-compat.c b/drivers/clk/at91/dt-compat.c new file mode 100644 index 000000000..dad26dd5e --- /dev/null +++ b/drivers/clk/at91/dt-compat.c @@ -0,0 +1,1068 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include "pmc.h" + +#define MASTER_SOURCE_MAX 4 + +#define PERIPHERAL_AT91RM9200 0 +#define PERIPHERAL_AT91SAM9X5 1 + +#define PERIPHERAL_MAX 64 + +#define PERIPHERAL_ID_MIN 2 + +#define PROG_SOURCE_MAX 5 +#define PROG_ID_MAX 7 + +#define SYSTEM_MAX_ID 31 + +#define GCK_INDEX_DT_AUDIO_PLL 5 + +static DEFINE_SPINLOCK(mck_lock); + +#ifdef CONFIG_HAVE_AT91_AUDIO_PLL +static void __init of_sama5d2_clk_audio_pll_frac_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *name = np->name; + const char *parent_name; + struct regmap *regmap; + struct device_node *parent_np; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + parent_name = of_clk_get_parent_name(np, 0); + + hw = at91_clk_register_audio_pll_frac(regmap, name, parent_name); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(of_sama5d2_clk_audio_pll_frac_setup, + "atmel,sama5d2-clk-audio-pll-frac", + of_sama5d2_clk_audio_pll_frac_setup); + +static void __init of_sama5d2_clk_audio_pll_pad_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *name = np->name; + const char *parent_name; + struct regmap *regmap; + struct device_node *parent_np; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + parent_name = of_clk_get_parent_name(np, 0); + + hw = at91_clk_register_audio_pll_pad(regmap, name, parent_name); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(of_sama5d2_clk_audio_pll_pad_setup, + "atmel,sama5d2-clk-audio-pll-pad", + of_sama5d2_clk_audio_pll_pad_setup); + +static void __init of_sama5d2_clk_audio_pll_pmc_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *name = np->name; + const char *parent_name; + struct regmap *regmap; + struct device_node *parent_np; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + parent_name = of_clk_get_parent_name(np, 0); + + hw = at91_clk_register_audio_pll_pmc(regmap, name, parent_name); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(of_sama5d2_clk_audio_pll_pmc_setup, + "atmel,sama5d2-clk-audio-pll-pmc", + of_sama5d2_clk_audio_pll_pmc_setup); +#endif /* CONFIG_HAVE_AT91_AUDIO_PLL */ + +static const struct clk_pcr_layout dt_pcr_layout = { + .offset = 0x10c, + .cmd = BIT(12), + .pid_mask = GENMASK(5, 0), + .div_mask = GENMASK(17, 16), + .gckcss_mask = GENMASK(10, 8), +}; + +#ifdef CONFIG_HAVE_AT91_GENERATED_CLK +#define GENERATED_SOURCE_MAX 6 + +#define GCK_ID_I2S0 54 +#define GCK_ID_I2S1 55 +#define GCK_ID_CLASSD 59 + +static void __init of_sama5d2_clk_generated_setup(struct device_node *np) +{ + int num; + u32 id; + const char *name; + struct clk_hw *hw; + unsigned int num_parents; + const char *parent_names[GENERATED_SOURCE_MAX]; + struct device_node *gcknp, *parent_np; + struct clk_range range = CLK_RANGE(0, 0); + struct regmap *regmap; + + num_parents = of_clk_get_parent_count(np); + if (num_parents == 0 || num_parents > GENERATED_SOURCE_MAX) + return; + + of_clk_parent_fill(np, parent_names, num_parents); + + num = of_get_child_count(np); + if (!num || num > PERIPHERAL_MAX) + return; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + for_each_child_of_node(np, gcknp) { + int chg_pid = INT_MIN; + + if (of_property_read_u32(gcknp, "reg", &id)) + continue; + + if (id < PERIPHERAL_ID_MIN || id >= PERIPHERAL_MAX) + continue; + + if (of_property_read_string(np, "clock-output-names", &name)) + name = gcknp->name; + + of_at91_get_clk_range(gcknp, "atmel,clk-output-range", + &range); + + if (of_device_is_compatible(np, "atmel,sama5d2-clk-generated") && + (id == GCK_ID_I2S0 || id == GCK_ID_I2S1 || + id == GCK_ID_CLASSD)) + chg_pid = GCK_INDEX_DT_AUDIO_PLL; + + hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, + &dt_pcr_layout, name, + parent_names, NULL, NULL, + num_parents, id, &range, + chg_pid); + if (IS_ERR(hw)) + continue; + + of_clk_add_hw_provider(gcknp, of_clk_hw_simple_get, hw); + } +} +CLK_OF_DECLARE(of_sama5d2_clk_generated_setup, "atmel,sama5d2-clk-generated", + of_sama5d2_clk_generated_setup); +#endif /* CONFIG_HAVE_AT91_GENERATED_CLK */ + +#ifdef CONFIG_HAVE_AT91_H32MX +static void __init of_sama5d4_clk_h32mx_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *name = np->name; + const char *parent_name; + struct regmap *regmap; + struct device_node *parent_np; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + parent_name = of_clk_get_parent_name(np, 0); + + hw = at91_clk_register_h32mx(regmap, name, parent_name); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(of_sama5d4_clk_h32mx_setup, "atmel,sama5d4-clk-h32mx", + of_sama5d4_clk_h32mx_setup); +#endif /* CONFIG_HAVE_AT91_H32MX */ + +#ifdef CONFIG_HAVE_AT91_I2S_MUX_CLK +#define I2S_BUS_NR 2 + +static void __init of_sama5d2_clk_i2s_mux_setup(struct device_node *np) +{ + struct regmap *regmap_sfr; + u64 bus_id; + const char *parent_names[2]; + struct device_node *i2s_mux_np; + struct clk_hw *hw; + int ret; + + regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr"); + if (IS_ERR(regmap_sfr)) + return; + + for_each_child_of_node(np, i2s_mux_np) { + if (of_property_read_reg(i2s_mux_np, 0, &bus_id, NULL)) + continue; + + if (bus_id > I2S_BUS_NR) + continue; + + ret = of_clk_parent_fill(i2s_mux_np, parent_names, 2); + if (ret != 2) + continue; + + hw = at91_clk_i2s_mux_register(regmap_sfr, i2s_mux_np->name, + parent_names, 2, bus_id); + if (IS_ERR(hw)) + continue; + + of_clk_add_hw_provider(i2s_mux_np, of_clk_hw_simple_get, hw); + } +} +CLK_OF_DECLARE(sama5d2_clk_i2s_mux, "atmel,sama5d2-clk-i2s-mux", + of_sama5d2_clk_i2s_mux_setup); +#endif /* CONFIG_HAVE_AT91_I2S_MUX_CLK */ + +static void __init of_at91rm9200_clk_main_osc_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *name = np->name; + const char *parent_name; + struct regmap *regmap; + bool bypass; + struct device_node *parent_np; + + of_property_read_string(np, "clock-output-names", &name); + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + parent_name = of_clk_get_parent_name(np, 0); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91_clk_register_main_osc(regmap, name, parent_name, NULL, bypass); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91rm9200_clk_main_osc, "atmel,at91rm9200-clk-main-osc", + of_at91rm9200_clk_main_osc_setup); + +static void __init of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np) +{ + struct clk_hw *hw; + u32 frequency = 0; + u32 accuracy = 0; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + of_property_read_string(np, "clock-output-names", &name); + of_property_read_u32(np, "clock-frequency", &frequency); + of_property_read_u32(np, "clock-accuracy", &accuracy); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91_clk_register_main_rc_osc(regmap, name, frequency, accuracy); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9x5_clk_main_rc_osc, "atmel,at91sam9x5-clk-main-rc-osc", + of_at91sam9x5_clk_main_rc_osc_setup); + +static void __init of_at91rm9200_clk_main_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *parent_name; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + parent_name = of_clk_get_parent_name(np, 0); + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91_clk_register_rm9200_main(regmap, name, parent_name, NULL); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91rm9200_clk_main, "atmel,at91rm9200-clk-main", + of_at91rm9200_clk_main_setup); + +static void __init of_at91sam9x5_clk_main_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *parent_names[2]; + unsigned int num_parents; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + num_parents = of_clk_get_parent_count(np); + if (num_parents == 0 || num_parents > 2) + return; + + of_clk_parent_fill(np, parent_names, num_parents); + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + of_property_read_string(np, "clock-output-names", &name); + + hw = at91_clk_register_sam9x5_main(regmap, name, parent_names, NULL, + num_parents); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9x5_clk_main, "atmel,at91sam9x5-clk-main", + of_at91sam9x5_clk_main_setup); + +static struct clk_master_characteristics * __init +of_at91_clk_master_get_characteristics(struct device_node *np) +{ + struct clk_master_characteristics *characteristics; + + characteristics = kzalloc_obj(*characteristics); + if (!characteristics) + return NULL; + + if (of_at91_get_clk_range(np, "atmel,clk-output-range", &characteristics->output)) + goto out_free_characteristics; + + of_property_read_u32_array(np, "atmel,clk-divisors", + characteristics->divisors, 4); + + characteristics->have_div3_pres = + of_property_read_bool(np, "atmel,master-clk-have-div3-pres"); + + return characteristics; + +out_free_characteristics: + kfree(characteristics); + return NULL; +} + +static void __init +of_at91_clk_master_setup(struct device_node *np, + const struct clk_master_layout *layout) +{ + struct clk_hw *hw; + unsigned int num_parents; + const char *parent_names[MASTER_SOURCE_MAX]; + const char *name = np->name; + struct clk_master_characteristics *characteristics; + struct regmap *regmap; + struct device_node *parent_np; + + num_parents = of_clk_get_parent_count(np); + if (num_parents == 0 || num_parents > MASTER_SOURCE_MAX) + return; + + of_clk_parent_fill(np, parent_names, num_parents); + + of_property_read_string(np, "clock-output-names", &name); + + characteristics = of_at91_clk_master_get_characteristics(np); + if (!characteristics) + return; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91_clk_register_master_pres(regmap, "masterck_pres", num_parents, + parent_names, NULL, layout, + characteristics, &mck_lock); + if (IS_ERR(hw)) + goto out_free_characteristics; + + hw = at91_clk_register_master_div(regmap, name, "masterck_pres", NULL, + layout, characteristics, + &mck_lock, CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto out_free_characteristics; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); + return; + +out_free_characteristics: + kfree(characteristics); +} + +static void __init of_at91rm9200_clk_master_setup(struct device_node *np) +{ + of_at91_clk_master_setup(np, &at91rm9200_master_layout); +} +CLK_OF_DECLARE(at91rm9200_clk_master, "atmel,at91rm9200-clk-master", + of_at91rm9200_clk_master_setup); + +static void __init of_at91sam9x5_clk_master_setup(struct device_node *np) +{ + of_at91_clk_master_setup(np, &at91sam9x5_master_layout); +} +CLK_OF_DECLARE(at91sam9x5_clk_master, "atmel,at91sam9x5-clk-master", + of_at91sam9x5_clk_master_setup); + +static void __init +of_at91_clk_periph_setup(struct device_node *np, u8 type) +{ + int num; + u32 id; + struct clk_hw *hw; + const char *parent_name; + const char *name; + struct device_node *periphclknp; + struct regmap *regmap; + struct device_node *parent_np; + + parent_name = of_clk_get_parent_name(np, 0); + if (!parent_name) + return; + + num = of_get_child_count(np); + if (!num || num > PERIPHERAL_MAX) + return; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + for_each_child_of_node(np, periphclknp) { + if (of_property_read_u32(periphclknp, "reg", &id)) + continue; + + if (id >= PERIPHERAL_MAX) + continue; + + if (of_property_read_string(np, "clock-output-names", &name)) + name = periphclknp->name; + + if (type == PERIPHERAL_AT91RM9200) { + hw = at91_clk_register_peripheral(regmap, name, + parent_name, NULL, id); + } else { + struct clk_range range = CLK_RANGE(0, 0); + unsigned long flags = 0; + + of_at91_get_clk_range(periphclknp, + "atmel,clk-output-range", + &range); + + /* + * mpddr_clk feed DDR controller and is enabled by + * bootloader thus we need to keep it enabled in case + * there is no Linux consumer for it. + */ + if (!strcmp(periphclknp->name, "mpddr_clk")) + flags = CLK_IS_CRITICAL; + + hw = at91_clk_register_sam9x5_peripheral(regmap, + &pmc_pcr_lock, + &dt_pcr_layout, + name, + parent_name, + NULL, + id, &range, + INT_MIN, + flags); + } + + if (IS_ERR(hw)) + continue; + + of_clk_add_hw_provider(periphclknp, of_clk_hw_simple_get, hw); + } +} + +static void __init of_at91rm9200_clk_periph_setup(struct device_node *np) +{ + of_at91_clk_periph_setup(np, PERIPHERAL_AT91RM9200); +} +CLK_OF_DECLARE(at91rm9200_clk_periph, "atmel,at91rm9200-clk-peripheral", + of_at91rm9200_clk_periph_setup); + +static void __init of_at91sam9x5_clk_periph_setup(struct device_node *np) +{ + of_at91_clk_periph_setup(np, PERIPHERAL_AT91SAM9X5); +} +CLK_OF_DECLARE(at91sam9x5_clk_periph, "atmel,at91sam9x5-clk-peripheral", + of_at91sam9x5_clk_periph_setup); + +static struct clk_pll_characteristics * __init +of_at91_clk_pll_get_characteristics(struct device_node *np) +{ + int i; + int offset; + u32 tmp; + int num_output; + u32 num_cells; + struct clk_range input; + struct clk_range *output; + u8 *out = NULL; + u16 *icpll = NULL; + struct clk_pll_characteristics *characteristics; + + if (of_at91_get_clk_range(np, "atmel,clk-input-range", &input)) + return NULL; + + if (of_property_read_u32(np, "#atmel,pll-clk-output-range-cells", + &num_cells)) + return NULL; + + if (num_cells < 2 || num_cells > 4) + return NULL; + + num_output = of_property_count_u32_elems(np, "atmel,pll-clk-output-ranges"); + if (num_output <= 0) + return NULL; + num_output /= num_cells; + + characteristics = kzalloc_obj(*characteristics); + if (!characteristics) + return NULL; + + output = kzalloc_objs(*output, num_output); + if (!output) + goto out_free_characteristics; + + if (num_cells > 2) { + out = kcalloc(num_output, sizeof(*out), GFP_KERNEL); + if (!out) + goto out_free_output; + } + + if (num_cells > 3) { + icpll = kcalloc(num_output, sizeof(*icpll), GFP_KERNEL); + if (!icpll) + goto out_free_output; + } + + for (i = 0; i < num_output; i++) { + offset = i * num_cells; + if (of_property_read_u32_index(np, + "atmel,pll-clk-output-ranges", + offset, &tmp)) + goto out_free_output; + output[i].min = tmp; + if (of_property_read_u32_index(np, + "atmel,pll-clk-output-ranges", + offset + 1, &tmp)) + goto out_free_output; + output[i].max = tmp; + + if (num_cells == 2) + continue; + + if (of_property_read_u32_index(np, + "atmel,pll-clk-output-ranges", + offset + 2, &tmp)) + goto out_free_output; + out[i] = tmp; + + if (num_cells == 3) + continue; + + if (of_property_read_u32_index(np, + "atmel,pll-clk-output-ranges", + offset + 3, &tmp)) + goto out_free_output; + icpll[i] = tmp; + } + + characteristics->input = input; + characteristics->num_output = num_output; + characteristics->output = output; + characteristics->out = out; + characteristics->icpll = icpll; + return characteristics; + +out_free_output: + kfree(icpll); + kfree(out); + kfree(output); +out_free_characteristics: + kfree(characteristics); + return NULL; +} + +static void __init +of_at91_clk_pll_setup(struct device_node *np, + const struct clk_pll_layout *layout) +{ + u32 id; + struct clk_hw *hw; + struct regmap *regmap; + const char *parent_name; + const char *name = np->name; + struct device_node *parent_np; + struct clk_pll_characteristics *characteristics; + + if (of_property_read_u32(np, "reg", &id)) + return; + + parent_name = of_clk_get_parent_name(np, 0); + + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + characteristics = of_at91_clk_pll_get_characteristics(np); + if (!characteristics) + return; + + hw = at91_clk_register_pll(regmap, name, parent_name, id, layout, + characteristics); + if (IS_ERR(hw)) + goto out_free_characteristics; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); + return; + +out_free_characteristics: + kfree(characteristics); +} + +static void __init of_at91rm9200_clk_pll_setup(struct device_node *np) +{ + of_at91_clk_pll_setup(np, &at91rm9200_pll_layout); +} +CLK_OF_DECLARE(at91rm9200_clk_pll, "atmel,at91rm9200-clk-pll", + of_at91rm9200_clk_pll_setup); + +static void __init of_at91sam9g45_clk_pll_setup(struct device_node *np) +{ + of_at91_clk_pll_setup(np, &at91sam9g45_pll_layout); +} +CLK_OF_DECLARE(at91sam9g45_clk_pll, "atmel,at91sam9g45-clk-pll", + of_at91sam9g45_clk_pll_setup); + +static void __init of_at91sam9g20_clk_pllb_setup(struct device_node *np) +{ + of_at91_clk_pll_setup(np, &at91sam9g20_pllb_layout); +} +CLK_OF_DECLARE(at91sam9g20_clk_pllb, "atmel,at91sam9g20-clk-pllb", + of_at91sam9g20_clk_pllb_setup); + +static void __init of_sama5d3_clk_pll_setup(struct device_node *np) +{ + of_at91_clk_pll_setup(np, &sama5d3_pll_layout); +} +CLK_OF_DECLARE(sama5d3_clk_pll, "atmel,sama5d3-clk-pll", + of_sama5d3_clk_pll_setup); + +static void __init +of_at91sam9x5_clk_plldiv_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *parent_name; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + parent_name = of_clk_get_parent_name(np, 0); + + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91_clk_register_plldiv(regmap, name, parent_name); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9x5_clk_plldiv, "atmel,at91sam9x5-clk-plldiv", + of_at91sam9x5_clk_plldiv_setup); + +static void __init +of_at91_clk_prog_setup(struct device_node *np, + const struct clk_programmable_layout *layout, + u32 *mux_table) +{ + int num; + u32 id; + struct clk_hw *hw; + unsigned int num_parents; + const char *parent_names[PROG_SOURCE_MAX]; + const char *name; + struct device_node *progclknp, *parent_np; + struct regmap *regmap; + + num_parents = of_clk_get_parent_count(np); + if (num_parents == 0 || num_parents > PROG_SOURCE_MAX) + return; + + of_clk_parent_fill(np, parent_names, num_parents); + + num = of_get_child_count(np); + if (!num || num > (PROG_ID_MAX + 1)) + return; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + for_each_child_of_node(np, progclknp) { + if (of_property_read_u32(progclknp, "reg", &id)) + continue; + + if (of_property_read_string(np, "clock-output-names", &name)) + name = progclknp->name; + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, num_parents, + id, layout, mux_table); + if (IS_ERR(hw)) + continue; + + of_clk_add_hw_provider(progclknp, of_clk_hw_simple_get, hw); + } +} + +static void __init of_at91rm9200_clk_prog_setup(struct device_node *np) +{ + of_at91_clk_prog_setup(np, &at91rm9200_programmable_layout, NULL); +} +CLK_OF_DECLARE(at91rm9200_clk_prog, "atmel,at91rm9200-clk-programmable", + of_at91rm9200_clk_prog_setup); + +static void __init of_at91sam9g45_clk_prog_setup(struct device_node *np) +{ + of_at91_clk_prog_setup(np, &at91sam9g45_programmable_layout, NULL); +} +CLK_OF_DECLARE(at91sam9g45_clk_prog, "atmel,at91sam9g45-clk-programmable", + of_at91sam9g45_clk_prog_setup); + +static void __init of_at91sam9x5_clk_prog_setup(struct device_node *np) +{ + of_at91_clk_prog_setup(np, &at91sam9x5_programmable_layout, NULL); +} +CLK_OF_DECLARE(at91sam9x5_clk_prog, "atmel,at91sam9x5-clk-programmable", + of_at91sam9x5_clk_prog_setup); + +static void __init of_at91sam9260_clk_slow_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *parent_names[2]; + unsigned int num_parents; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + num_parents = of_clk_get_parent_count(np); + if (num_parents != 2) + return; + + of_clk_parent_fill(np, parent_names, num_parents); + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + of_property_read_string(np, "clock-output-names", &name); + + hw = at91_clk_register_sam9260_slow(regmap, name, parent_names, + num_parents); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9260_clk_slow, "atmel,at91sam9260-clk-slow", + of_at91sam9260_clk_slow_setup); + +#ifdef CONFIG_HAVE_AT91_SMD +#define SMD_SOURCE_MAX 2 + +static void __init of_at91sam9x5_clk_smd_setup(struct device_node *np) +{ + struct clk_hw *hw; + unsigned int num_parents; + const char *parent_names[SMD_SOURCE_MAX]; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + num_parents = of_clk_get_parent_count(np); + if (num_parents == 0 || num_parents > SMD_SOURCE_MAX) + return; + + of_clk_parent_fill(np, parent_names, num_parents); + + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91sam9x5_clk_register_smd(regmap, name, parent_names, + num_parents); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9x5_clk_smd, "atmel,at91sam9x5-clk-smd", + of_at91sam9x5_clk_smd_setup); +#endif /* CONFIG_HAVE_AT91_SMD */ + +static void __init of_at91rm9200_clk_sys_setup(struct device_node *np) +{ + int num; + u32 id; + struct clk_hw *hw; + const char *name; + struct device_node *sysclknp, *parent_np; + const char *parent_name; + struct regmap *regmap; + + num = of_get_child_count(np); + if (num > (SYSTEM_MAX_ID + 1)) + return; + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + for_each_child_of_node(np, sysclknp) { + unsigned long flags = 0; + + if (of_property_read_u32(sysclknp, "reg", &id)) + continue; + + if (of_property_read_string(np, "clock-output-names", &name)) + name = sysclknp->name; + + parent_name = of_clk_get_parent_name(sysclknp, 0); + + /* + * ddrck feeds DDR controller and is enabled by bootloader thus + * we need to keep it enabled in case there is no Linux consumer + * for it. + */ + if (!strcmp(sysclknp->name, "ddrck")) + flags = CLK_IS_CRITICAL; + + hw = at91_clk_register_system(regmap, name, parent_name, NULL, + id, flags); + if (IS_ERR(hw)) + continue; + + of_clk_add_hw_provider(sysclknp, of_clk_hw_simple_get, hw); + } +} +CLK_OF_DECLARE(at91rm9200_clk_sys, "atmel,at91rm9200-clk-system", + of_at91rm9200_clk_sys_setup); + +#ifdef CONFIG_HAVE_AT91_USB_CLK +#define USB_SOURCE_MAX 2 + +static void __init of_at91sam9x5_clk_usb_setup(struct device_node *np) +{ + struct clk_hw *hw; + unsigned int num_parents; + const char *parent_names[USB_SOURCE_MAX]; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + num_parents = of_clk_get_parent_count(np); + if (num_parents == 0 || num_parents > USB_SOURCE_MAX) + return; + + of_clk_parent_fill(np, parent_names, num_parents); + + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91sam9x5_clk_register_usb(regmap, name, parent_names, + num_parents); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9x5_clk_usb, "atmel,at91sam9x5-clk-usb", + of_at91sam9x5_clk_usb_setup); + +static void __init of_at91sam9n12_clk_usb_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *parent_name; + const char *name = np->name; + struct regmap *regmap; + struct device_node *parent_np; + + parent_name = of_clk_get_parent_name(np, 0); + if (!parent_name) + return; + + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + + hw = at91sam9n12_clk_register_usb(regmap, name, parent_name); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9n12_clk_usb, "atmel,at91sam9n12-clk-usb", + of_at91sam9n12_clk_usb_setup); + +static void __init of_at91rm9200_clk_usb_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *parent_name; + const char *name = np->name; + u32 divisors[4] = {0, 0, 0, 0}; + struct regmap *regmap; + struct device_node *parent_np; + + parent_name = of_clk_get_parent_name(np, 0); + if (!parent_name) + return; + + of_property_read_u32_array(np, "atmel,clk-divisors", divisors, 4); + if (!divisors[0]) + return; + + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap)) + return; + hw = at91rm9200_clk_register_usb(regmap, name, parent_name, divisors); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91rm9200_clk_usb, "atmel,at91rm9200-clk-usb", + of_at91rm9200_clk_usb_setup); +#endif /* CONFIG_HAVE_AT91_USB_CLK */ + +#ifdef CONFIG_HAVE_AT91_UTMI +static void __init of_at91sam9x5_clk_utmi_setup(struct device_node *np) +{ + struct clk_hw *hw; + const char *parent_name; + const char *name = np->name; + struct regmap *regmap_pmc, *regmap_sfr; + struct device_node *parent_np; + + parent_name = of_clk_get_parent_name(np, 0); + + of_property_read_string(np, "clock-output-names", &name); + + parent_np = of_get_parent(np); + regmap_pmc = syscon_node_to_regmap(parent_np); + of_node_put(parent_np); + if (IS_ERR(regmap_pmc)) + return; + + /* + * If the device supports different mainck rates, this value has to be + * set in the UTMI Clock Trimming register. + * - 9x5: mainck supports several rates but it is indicated that a + * 12 MHz is needed in case of USB. + * - sama5d3 and sama5d2: mainck supports several rates. Configuring + * the FREQ field of the UTMI Clock Trimming register is mandatory. + * - sama5d4: mainck is at 12 MHz. + * + * We only need to retrieve sama5d3 or sama5d2 sfr regmap. + */ + regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d3-sfr"); + if (IS_ERR(regmap_sfr)) { + regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr"); + if (IS_ERR(regmap_sfr)) + regmap_sfr = NULL; + } + + hw = at91_clk_register_utmi(regmap_pmc, regmap_sfr, name, parent_name, NULL); + if (IS_ERR(hw)) + return; + + of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw); +} +CLK_OF_DECLARE(at91sam9x5_clk_utmi, "atmel,at91sam9x5-clk-utmi", + of_at91sam9x5_clk_utmi_setup); +#endif /* CONFIG_HAVE_AT91_UTMI */ diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c new file mode 100644 index 000000000..03a6c31d6 --- /dev/null +++ b/drivers/clk/at91/pmc.c @@ -0,0 +1,197 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/clk/at91_pmc.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/mfd/syscon.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/syscore_ops.h> + +#include <asm/proc-fns.h> + +#include "pmc.h" + +#define PMC_MAX_IDS 128 +#define PMC_MAX_PCKS 8 + +int of_at91_get_clk_range(struct device_node *np, const char *propname, + struct clk_range *range) +{ + u32 min, max; + int ret; + + ret = of_property_read_u32_index(np, propname, 0, &min); + if (ret) + return ret; + + ret = of_property_read_u32_index(np, propname, 1, &max); + if (ret) + return ret; + + if (range) { + range->min = min; + range->max = max; + } + + return 0; +} +EXPORT_SYMBOL_GPL(of_at91_get_clk_range); + +struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data) +{ + unsigned int type = clkspec->args[0]; + unsigned int idx = clkspec->args[1]; + struct pmc_data *pmc_data = data; + + switch (type) { + case PMC_TYPE_CORE: + if (idx < pmc_data->ncore) + return pmc_data->chws[idx]; + break; + case PMC_TYPE_SYSTEM: + if (idx < pmc_data->nsystem) + return pmc_data->shws[idx]; + break; + case PMC_TYPE_PERIPHERAL: + if (idx < pmc_data->nperiph) + return pmc_data->phws[idx]; + break; + case PMC_TYPE_GCK: + if (idx < pmc_data->ngck) + return pmc_data->ghws[idx]; + break; + case PMC_TYPE_PROGRAMMABLE: + if (idx < pmc_data->npck) + return pmc_data->pchws[idx]; + break; + default: + break; + } + + pr_err("%s: invalid type (%u) or index (%u)\n", __func__, type, idx); + + return ERR_PTR(-EINVAL); +} + +struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem, + unsigned int nperiph, unsigned int ngck, + unsigned int npck) +{ + unsigned int num_clks = ncore + nsystem + nperiph + ngck + npck; + struct pmc_data *pmc_data; + + pmc_data = kzalloc_flex(*pmc_data, hwtable, num_clks); + if (!pmc_data) + return NULL; + + pmc_data->ncore = ncore; + pmc_data->chws = pmc_data->hwtable; + + pmc_data->nsystem = nsystem; + pmc_data->shws = pmc_data->chws + ncore; + + pmc_data->nperiph = nperiph; + pmc_data->phws = pmc_data->shws + nsystem; + + pmc_data->ngck = ngck; + pmc_data->ghws = pmc_data->phws + nperiph; + + pmc_data->npck = npck; + pmc_data->pchws = pmc_data->ghws + ngck; + + return pmc_data; +} + +#ifdef CONFIG_PM + +/* Address in SECURAM that say if we suspend to backup mode. */ +static void __iomem *at91_pmc_backup_suspend; + +static int at91_pmc_suspend(void *data) +{ + unsigned int backup; + + if (!at91_pmc_backup_suspend) + return 0; + + backup = readl_relaxed(at91_pmc_backup_suspend); + if (!backup) + return 0; + + return clk_save_context(); +} + +static void at91_pmc_resume(void *data) +{ + unsigned int backup; + + if (!at91_pmc_backup_suspend) + return; + + backup = readl_relaxed(at91_pmc_backup_suspend); + if (!backup) + return; + + clk_restore_context(); +} + +static const struct syscore_ops pmc_syscore_ops = { + .suspend = at91_pmc_suspend, + .resume = at91_pmc_resume, +}; + +static struct syscore pmc_syscore = { + .ops = &pmc_syscore_ops, +}; + +static const struct of_device_id pmc_dt_ids[] = { + { .compatible = "atmel,sama5d2-pmc" }, + { .compatible = "microchip,sama7g5-pmc", }, + { .compatible = "microchip,sama7d65-pmc", }, + { /* sentinel */ } +}; + +static int __init pmc_register_ops(void) +{ + struct device_node *np; + + np = of_find_matching_node(NULL, pmc_dt_ids); + if (!np) + return -ENODEV; + + if (!of_device_is_available(np)) { + of_node_put(np); + return -ENODEV; + } + of_node_put(np); + + np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-securam"); + if (!np) + return -ENODEV; + + if (!of_device_is_available(np)) { + of_node_put(np); + return -ENODEV; + } + + at91_pmc_backup_suspend = of_iomap(np, 0); + of_node_put(np); + if (!at91_pmc_backup_suspend) { + pr_warn("%s(): unable to map securam\n", __func__); + return -ENOMEM; + } + + register_syscore(&pmc_syscore); + + return 0; +} +/* This has to happen before arch_initcall because of the tcb_clksrc driver */ +postcore_initcall(pmc_register_ops); +#endif diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h new file mode 100644 index 000000000..543d7aee8 --- /dev/null +++ b/drivers/clk/at91/pmc.h @@ -0,0 +1,296 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * drivers/clk/at91/pmc.h + * + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#ifndef __PMC_H_ +#define __PMC_H_ + +#include <linux/io.h> +#include <linux/irqdomain.h> +#include <linux/regmap.h> +#include <linux/spinlock.h> + +#include <dt-bindings/clock/at91.h> + +extern spinlock_t pmc_pcr_lock; + +struct pmc_data { + unsigned int ncore; + struct clk_hw **chws; + unsigned int nsystem; + struct clk_hw **shws; + unsigned int nperiph; + struct clk_hw **phws; + unsigned int ngck; + struct clk_hw **ghws; + unsigned int npck; + struct clk_hw **pchws; + + struct clk_hw *hwtable[]; +}; + +struct clk_range { + unsigned long min; + unsigned long max; +}; + +#define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,} + +struct clk_master_layout { + u32 offset; + u32 mask; + u8 pres_shift; +}; + +extern const struct clk_master_layout at91rm9200_master_layout; +extern const struct clk_master_layout at91sam9x5_master_layout; + +struct clk_master_characteristics { + struct clk_range output; + u32 divisors[5]; + u8 have_div3_pres; +}; + +struct clk_pll_layout { + u32 pllr_mask; + u32 mul_mask; + u32 frac_mask; + u32 div_mask; + u32 endiv_mask; + u8 mul_shift; + u8 frac_shift; + u8 div_shift; + u8 endiv_shift; + u8 div2; +}; + +extern const struct clk_pll_layout at91rm9200_pll_layout; +extern const struct clk_pll_layout at91sam9g45_pll_layout; +extern const struct clk_pll_layout at91sam9g20_pllb_layout; +extern const struct clk_pll_layout sama5d3_pll_layout; + +struct clk_pll_characteristics { + struct clk_range input; + int num_output; + const struct clk_range *output; + const struct clk_range *core_output; + u16 *icpll; + u8 *out; + u8 upll : 1; + u32 acr; +}; + +struct clk_programmable_layout { + u8 pres_mask; + u8 pres_shift; + u8 css_mask; + u8 have_slck_mck; + u8 is_pres_direct; +}; + +extern const struct clk_programmable_layout at91rm9200_programmable_layout; +extern const struct clk_programmable_layout at91sam9g45_programmable_layout; +extern const struct clk_programmable_layout at91sam9x5_programmable_layout; + +struct clk_pcr_layout { + u32 offset; + u32 cmd; + u32 div_mask; + u32 gckcss_mask; + u32 pid_mask; +}; + +/** + * struct at91_clk_pms - Power management state for AT91 clock + * @rate: clock rate + * @parent_rate: clock parent rate + * @status: clock status (enabled or disabled) + * @parent: clock parent index + */ +struct at91_clk_pms { + unsigned long rate; + unsigned long parent_rate; + unsigned int status; + unsigned int parent; +}; + +#define ndck(a, s) (a[s - 1].id + 1) +#define nck(a) (a[ARRAY_SIZE(a) - 1].id + 1) + +#define PMC_INIT_TABLE(_table, _count) \ + do { \ + u8 _i; \ + for (_i = 0; _i < (_count); _i++) \ + (_table)[_i] = _i; \ + } while (0) + +#define PMC_FILL_TABLE(_to, _from, _count) \ + do { \ + u8 _i; \ + for (_i = 0; _i < (_count); _i++) { \ + (_to)[_i] = (_from)[_i]; \ + } \ + } while (0) + +struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem, + unsigned int nperiph, unsigned int ngck, + unsigned int npck); + +int of_at91_get_clk_range(struct device_node *np, const char *propname, + struct clk_range *range); + +struct clk_hw *of_clk_hw_pmc_get(struct of_phandle_args *clkspec, void *data); + +struct clk_hw * __init +at91_clk_register_audio_pll_frac(struct regmap *regmap, const char *name, + const char *parent_name); + +struct clk_hw * __init +at91_clk_register_audio_pll_pad(struct regmap *regmap, const char *name, + const char *parent_name); + +struct clk_hw * __init +at91_clk_register_audio_pll_pmc(struct regmap *regmap, const char *name, + const char *parent_name); + +struct clk_hw * __init +at91_clk_register_generated(struct regmap *regmap, spinlock_t *lock, + const struct clk_pcr_layout *layout, + const char *name, const char **parent_names, + struct clk_hw **parent_hws, u32 *mux_table, + u8 num_parents, u8 id, + const struct clk_range *range, int chg_pid); + +struct clk_hw * __init +at91_clk_register_h32mx(struct regmap *regmap, const char *name, + const char *parent_name); + +struct clk_hw * __init +at91_clk_i2s_mux_register(struct regmap *regmap, const char *name, + const char * const *parent_names, + unsigned int num_parents, u8 bus_id); + +struct clk_hw * __init +at91_clk_register_main_rc_osc(struct regmap *regmap, const char *name, + u32 frequency, u32 accuracy); +struct clk_hw * __init +at91_clk_register_main_osc(struct regmap *regmap, const char *name, + const char *parent_name, + struct clk_parent_data *parent_data, bool bypass); +struct clk_hw * __init +at91_clk_register_rm9200_main(struct regmap *regmap, + const char *name, + const char *parent_name, + struct clk_hw *parent_hw); +struct clk_hw * __init +at91_clk_register_sam9x5_main(struct regmap *regmap, const char *name, + const char **parent_names, + struct clk_hw **parent_hws, int num_parents); + +struct clk_hw * __init +at91_clk_register_master_pres(struct regmap *regmap, const char *name, + int num_parents, const char **parent_names, + struct clk_hw **parent_hws, + const struct clk_master_layout *layout, + const struct clk_master_characteristics *characteristics, + spinlock_t *lock); + +struct clk_hw * __init +at91_clk_register_master_div(struct regmap *regmap, const char *name, + const char *parent_names, struct clk_hw *parent_hw, + const struct clk_master_layout *layout, + const struct clk_master_characteristics *characteristics, + spinlock_t *lock, u32 flags, u32 safe_div); + +struct clk_hw * __init +at91_clk_sama7g5_register_master(struct regmap *regmap, + const char *name, int num_parents, + const char **parent_names, + struct clk_hw **parent_hws, u32 *mux_table, + spinlock_t *lock, u8 id, bool critical, + int chg_pid); + +struct clk_hw * __init +at91_clk_register_peripheral(struct regmap *regmap, const char *name, + const char *parent_name, struct clk_hw *parent_hw, + u32 id); +struct clk_hw * __init +at91_clk_register_sam9x5_peripheral(struct regmap *regmap, spinlock_t *lock, + const struct clk_pcr_layout *layout, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, + u32 id, const struct clk_range *range, + int chg_pid, unsigned long flags); + +struct clk_hw * __init +at91_clk_register_pll(struct regmap *regmap, const char *name, + const char *parent_name, u8 id, + const struct clk_pll_layout *layout, + const struct clk_pll_characteristics *characteristics); +struct clk_hw * __init +at91_clk_register_plldiv(struct regmap *regmap, const char *name, + const char *parent_name); + +struct clk_hw * __init +sam9x60_clk_register_div_pll(struct regmap *regmap, spinlock_t *lock, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, u8 id, + const struct clk_pll_characteristics *characteristics, + const struct clk_pll_layout *layout, u32 flags, + u32 safe_div); + +struct clk_hw * __init +sam9x60_clk_register_frac_pll(struct regmap *regmap, spinlock_t *lock, + const char *name, const char *parent_name, + struct clk_hw *parent_hw, u8 id, + const struct clk_pll_characteristics *characteristics, + const struct clk_pll_layout *layout, u32 flags); + +struct clk_hw * __init +at91_clk_register_programmable(struct regmap *regmap, const char *name, + const char **parent_names, struct clk_hw **parent_hws, + u8 num_parents, u8 id, + const struct clk_programmable_layout *layout, + u32 *mux_table); + +struct clk_hw * __init +at91_clk_register_sam9260_slow(struct regmap *regmap, + const char *name, + const char **parent_names, + int num_parents); + +struct clk_hw * __init +at91sam9x5_clk_register_smd(struct regmap *regmap, const char *name, + const char **parent_names, u8 num_parents); + +struct clk_hw * __init +at91_clk_register_system(struct regmap *regmap, const char *name, + const char *parent_name, struct clk_hw *parent_hw, + u8 id, unsigned long flags); + +struct clk_hw * __init +at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name, + const char **parent_names, u8 num_parents); +struct clk_hw * __init +at91sam9n12_clk_register_usb(struct regmap *regmap, const char *name, + const char *parent_name); +struct clk_hw * __init +sam9x60_clk_register_usb(struct regmap *regmap, const char *name, + const char **parent_names, u8 num_parents); +struct clk_hw * __init +at91rm9200_clk_register_usb(struct regmap *regmap, const char *name, + const char *parent_name, const u32 *divisors); + +struct clk_hw * __init +at91_clk_register_utmi(struct regmap *regmap_pmc, struct regmap *regmap_sfr, + const char *name, const char *parent_name, + struct clk_hw *parent_hw); + +struct clk_hw * __init +at91_clk_sama7g5_register_utmi(struct regmap *regmap, const char *name, + const char *parent_name, struct clk_hw *parent_hw); + +#endif /* __PMC_H_ */ diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c new file mode 100644 index 000000000..18baf4a25 --- /dev/null +++ b/drivers/clk/at91/sam9x60.c @@ -0,0 +1,380 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(pmc_pll_lock); +static DEFINE_SPINLOCK(mck_lock); + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 140000000, .max = 200000000 }, + .divisors = { 1, 2, 4, 3 }, + .have_div3_pres = 1, +}; + +static const struct clk_master_layout sam9x60_master_layout = { + .mask = 0x373, + .pres_shift = 4, + .offset = 0x28, +}; + +static const struct clk_range plla_outputs[] = { + { .min = 2343750, .max = 1200000000 }, +}; + +/* Fractional PLL core output range. */ +static const struct clk_range core_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 12000000, .max = 48000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .core_output = core_outputs, + .acr = UL(0x00020010), +}; + +static const struct clk_range upll_outputs[] = { + { .min = 300000000, .max = 500000000 }, +}; + +static const struct clk_pll_characteristics upll_characteristics = { + .input = { .min = 12000000, .max = 48000000 }, + .num_output = ARRAY_SIZE(upll_outputs), + .output = upll_outputs, + .core_output = core_outputs, + .upll = true, + .acr = UL(0x12023010), /* fIN = [18 MHz, 32 MHz]*/ +}; + +static const struct clk_pll_layout pll_frac_layout = { + .mul_mask = GENMASK(31, 24), + .frac_mask = GENMASK(21, 0), + .mul_shift = 24, + .frac_shift = 0, +}; + +static const struct clk_pll_layout pll_div_layout = { + .div_mask = GENMASK(7, 0), + .endiv_mask = BIT(29), + .div_shift = 0, + .endiv_shift = 29, +}; + +static const struct clk_programmable_layout sam9x60_programmable_layout = { + .pres_mask = 0xff, + .pres_shift = 8, + .css_mask = 0x1f, + .have_slck_mck = 0, + .is_pres_direct = 1, +}; + +static const struct clk_pcr_layout sam9x60_pcr_layout = { + .offset = 0x88, + .cmd = BIT(31), + .gckcss_mask = GENMASK(12, 8), + .pid_mask = GENMASK(6, 0), +}; + +static const struct { + char *n; + char *p; + unsigned long flags; + u8 id; +} sam9x60_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, + { .n = "qspick", .p = "masterck_div", .id = 19 }, +}; + +static const struct { + char *n; + unsigned long flags; + u8 id; +} sam9x60_periphck[] = { + { .n = "pioA_clk", .id = 2, }, + { .n = "pioB_clk", .id = 3, }, + { .n = "pioC_clk", .id = 4, }, + { .n = "flex0_clk", .id = 5, }, + { .n = "flex1_clk", .id = 6, }, + { .n = "flex2_clk", .id = 7, }, + { .n = "flex3_clk", .id = 8, }, + { .n = "flex6_clk", .id = 9, }, + { .n = "flex7_clk", .id = 10, }, + { .n = "flex8_clk", .id = 11, }, + { .n = "sdmmc0_clk", .id = 12, }, + { .n = "flex4_clk", .id = 13, }, + { .n = "flex5_clk", .id = 14, }, + { .n = "flex9_clk", .id = 15, }, + { .n = "flex10_clk", .id = 16, }, + { .n = "tcb0_clk", .id = 17, }, + { .n = "pwm_clk", .id = 18, }, + { .n = "adc_clk", .id = 19, }, + { .n = "dma0_clk", .id = 20, }, + { .n = "matrix_clk", .id = 21, }, + { .n = "uhphs_clk", .id = 22, }, + { .n = "udphs_clk", .id = 23, }, + { .n = "macb0_clk", .id = 24, }, + { .n = "lcd_clk", .id = 25, }, + { .n = "sdmmc1_clk", .id = 26, }, + { .n = "macb1_clk", .id = 27, }, + { .n = "ssc_clk", .id = 28, }, + { .n = "can0_clk", .id = 29, }, + { .n = "can1_clk", .id = 30, }, + { .n = "flex11_clk", .id = 32, }, + { .n = "flex12_clk", .id = 33, }, + { .n = "i2s_clk", .id = 34, }, + { .n = "qspi_clk", .id = 35, }, + { .n = "gfx2d_clk", .id = 36, }, + { .n = "pit64b_clk", .id = 37, }, + { .n = "trng_clk", .id = 38, }, + { .n = "aes_clk", .id = 39, }, + { .n = "tdes_clk", .id = 40, }, + { .n = "sha_clk", .id = 41, }, + { .n = "classd_clk", .id = 42, }, + { .n = "isi_clk", .id = 43, }, + { .n = "pioD_clk", .id = 44, }, + { .n = "tcb1_clk", .id = 45, }, + { .n = "dbgu_clk", .id = 47, }, + /* + * mpddr_clk feeds DDR controller and is enabled by bootloader thus we + * need to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "mpddr_clk", .id = 49, .flags = CLK_IS_CRITICAL }, +}; + +static const struct { + char *n; + u8 id; + struct clk_range r; +} sam9x60_gck[] = { + { .n = "flex0_gclk", .id = 5, }, + { .n = "flex1_gclk", .id = 6, }, + { .n = "flex2_gclk", .id = 7, }, + { .n = "flex3_gclk", .id = 8, }, + { .n = "flex6_gclk", .id = 9, }, + { .n = "flex7_gclk", .id = 10, }, + { .n = "flex8_gclk", .id = 11, }, + { .n = "sdmmc0_gclk", .id = 12, .r = { .min = 0, .max = 105000000 }, }, + { .n = "flex4_gclk", .id = 13, }, + { .n = "flex5_gclk", .id = 14, }, + { .n = "flex9_gclk", .id = 15, }, + { .n = "flex10_gclk", .id = 16, }, + { .n = "tcb0_gclk", .id = 17, }, + { .n = "adc_gclk", .id = 19, }, + { .n = "lcd_gclk", .id = 25, .r = { .min = 0, .max = 140000000 }, }, + { .n = "sdmmc1_gclk", .id = 26, .r = { .min = 0, .max = 105000000 }, }, + { .n = "flex11_gclk", .id = 32, }, + { .n = "flex12_gclk", .id = 33, }, + { .n = "i2s_gclk", .id = 34, .r = { .min = 0, .max = 105000000 }, }, + { .n = "pit64b_gclk", .id = 37, }, + { .n = "classd_gclk", .id = 42, .r = { .min = 0, .max = 100000000 }, }, + { .n = "tcb1_gclk", .id = 45, }, + { .n = "dbgu_gclk", .id = 47, }, +}; + +static void __init sam9x60_pmc_setup(struct device_node *np) +{ + struct clk_range range = CLK_RANGE(0, 0); + const char *td_slck_name, *md_slck_name, *mainxtal_name; + struct pmc_data *sam9x60_pmc; + const char *parent_names[6]; + struct clk_hw *main_osc_hw; + struct regmap *regmap; + struct clk_hw *hw; + int i; + + i = of_property_match_string(np, "clock-names", "td_slck"); + if (i < 0) + return; + + td_slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "md_slck"); + if (i < 0) + return; + + md_slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + sam9x60_pmc = pmc_data_allocate(PMC_PLLACK + 1, + nck(sam9x60_systemck), + nck(sam9x60_periphck), + nck(sam9x60_gck), 8); + if (!sam9x60_pmc) + return; + + hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 50000000); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, 0); + if (IS_ERR(hw)) + goto err_free; + main_osc_hw = hw; + + parent_names[0] = "main_rc_osc"; + parent_names[1] = "main_osc"; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->chws[PMC_MAIN] = hw; + + hw = sam9x60_clk_register_frac_pll(regmap, &pmc_pll_lock, "pllack_fracck", + "mainck", sam9x60_pmc->chws[PMC_MAIN], + 0, &plla_characteristics, + &pll_frac_layout, + /* + * This feeds pllack_divck which + * feeds CPU. It should not be + * disabled. + */ + CLK_IS_CRITICAL | CLK_SET_RATE_GATE); + if (IS_ERR(hw)) + goto err_free; + + hw = sam9x60_clk_register_div_pll(regmap, &pmc_pll_lock, "pllack_divck", + "pllack_fracck", NULL, 0, &plla_characteristics, + &pll_div_layout, + /* + * This feeds CPU. It should not + * be disabled. + */ + CLK_IS_CRITICAL | CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->chws[PMC_PLLACK] = hw; + + hw = sam9x60_clk_register_frac_pll(regmap, &pmc_pll_lock, "upllck_fracck", + "main_osc", main_osc_hw, 1, + &upll_characteristics, + &pll_frac_layout, CLK_SET_RATE_GATE); + if (IS_ERR(hw)) + goto err_free; + + hw = sam9x60_clk_register_div_pll(regmap, &pmc_pll_lock, "upllck_divck", + "upllck_fracck", NULL, 1, &upll_characteristics, + &pll_div_layout, + CLK_SET_RATE_GATE | + CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, 0); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = md_slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "pllack_divck"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 3, + parent_names, NULL, &sam9x60_master_layout, + &mck_characteristics, &mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, &sam9x60_master_layout, + &mck_characteristics, &mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->chws[PMC_MCK] = hw; + + parent_names[0] = "pllack_divck"; + parent_names[1] = "upllck_divck"; + parent_names[2] = "main_osc"; + hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 3); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = md_slck_name; + parent_names[1] = td_slck_name; + parent_names[2] = "mainck"; + parent_names[3] = "masterck_div"; + parent_names[4] = "pllack_divck"; + parent_names[5] = "upllck_divck"; + for (i = 0; i < 2; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 6, i, + &sam9x60_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sam9x60_systemck); i++) { + hw = at91_clk_register_system(regmap, sam9x60_systemck[i].n, + sam9x60_systemck[i].p, NULL, + sam9x60_systemck[i].id, + sam9x60_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->shws[sam9x60_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sam9x60_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sam9x60_pcr_layout, + sam9x60_periphck[i].n, + "masterck_div", NULL, + sam9x60_periphck[i].id, + &range, INT_MIN, + sam9x60_periphck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->phws[sam9x60_periphck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sam9x60_gck); i++) { + hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, + &sam9x60_pcr_layout, + sam9x60_gck[i].n, + parent_names, NULL, NULL, 6, + sam9x60_gck[i].id, + &sam9x60_gck[i].r, INT_MIN); + if (IS_ERR(hw)) + goto err_free; + + sam9x60_pmc->ghws[sam9x60_gck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x60_pmc); + + return; + +err_free: + kfree(sam9x60_pmc); +} +/* Some clks are used for a clocksource */ +CLK_OF_DECLARE(sam9x60_pmc, "microchip,sam9x60-pmc", sam9x60_pmc_setup); diff --git a/drivers/clk/at91/sam9x7.c b/drivers/clk/at91/sam9x7.c new file mode 100644 index 000000000..8b52da194 --- /dev/null +++ b/drivers/clk/at91/sam9x7.c @@ -0,0 +1,951 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SAM9X7 PMC code. + * + * Copyright (C) 2023 Microchip Technology Inc. and its subsidiaries + * + * Author: Varshini Rajendran <varshini.rajendran@microchip.com> + * + */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(pmc_pll_lock); +static DEFINE_SPINLOCK(mck_lock); + +/** + * enum pll_ids - PLL clocks identifiers + * @PLL_ID_PLLA: PLLA identifier + * @PLL_ID_UPLL: UPLL identifier + * @PLL_ID_AUDIO: Audio PLL identifier + * @PLL_ID_LVDS: LVDS PLL identifier + * @PLL_ID_PLLA_DIV2: PLLA DIV2 identifier + * @PLL_ID_MAX: Max PLL Identifier + */ +enum pll_ids { + PLL_ID_PLLA, + PLL_ID_UPLL, + PLL_ID_AUDIO, + PLL_ID_LVDS, + PLL_ID_PLLA_DIV2, + PLL_ID_MAX, +}; + +/** + * enum pll_type - PLL type identifiers + * @PLL_TYPE_FRAC: fractional PLL identifier + * @PLL_TYPE_DIV: divider PLL identifier + */ +enum pll_type { + PLL_TYPE_FRAC, + PLL_TYPE_DIV, +}; + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 32000000, .max = 266666667 }, + .divisors = { 1, 2, 4, 3, 5}, + .have_div3_pres = 1, +}; + +static const struct clk_master_layout sam9x7_master_layout = { + .mask = 0x373, + .pres_shift = 4, + .offset = 0x28, +}; + +/* Fractional PLL core output range. */ +static const struct clk_range plla_core_outputs[] = { + { .min = 800000000, .max = 1600000000 }, +}; + +static const struct clk_range upll_core_outputs[] = { + { .min = 600000000, .max = 960000000 }, +}; + +static const struct clk_range lvdspll_core_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +static const struct clk_range audiopll_core_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +static const struct clk_range plladiv2_core_outputs[] = { + { .min = 800000000, .max = 1600000000 }, +}; + +/* Fractional PLL output range. */ +static const struct clk_range plla_outputs[] = { + { .min = 400000000, .max = 800000000 }, +}; + +static const struct clk_range upll_outputs[] = { + { .min = 300000000, .max = 480000000 }, +}; + +static const struct clk_range lvdspll_outputs[] = { + { .min = 175000000, .max = 550000000 }, +}; + +static const struct clk_range audiopll_outputs[] = { + { .min = 0, .max = 300000000 }, +}; + +static const struct clk_range plladiv2_outputs[] = { + { .min = 200000000, .max = 400000000 }, +}; + +/* PLL characteristics. */ +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 20000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .core_output = plla_core_outputs, + .acr = UL(0x00020010), /* Old ACR_DEFAULT_PLLA value */ +}; + +static const struct clk_pll_characteristics upll_characteristics = { + .input = { .min = 20000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(upll_outputs), + .output = upll_outputs, + .core_output = upll_core_outputs, + .upll = true, + .acr = UL(0x12023010), /* fIN=[20 MHz, 32 MHz] */ +}; + +static const struct clk_pll_characteristics lvdspll_characteristics = { + .input = { .min = 20000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(lvdspll_outputs), + .output = lvdspll_outputs, + .core_output = lvdspll_core_outputs, + .acr = UL(0x12023010), /* fIN=[20 MHz, 32 MHz] */ +}; + +static const struct clk_pll_characteristics audiopll_characteristics = { + .input = { .min = 20000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(audiopll_outputs), + .output = audiopll_outputs, + .core_output = audiopll_core_outputs, + .acr = UL(0x12023010), /* fIN=[20 MHz, 32 MHz] */ +}; + +static const struct clk_pll_characteristics plladiv2_characteristics = { + .input = { .min = 20000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(plladiv2_outputs), + .output = plladiv2_outputs, + .core_output = plladiv2_core_outputs, + .acr = UL(0x00020010), /* Old ACR_DEFAULT_PLLA value */ +}; + +/* Layout for fractional PLL ID PLLA. */ +static const struct clk_pll_layout plla_frac_layout = { + .mul_mask = GENMASK(31, 24), + .frac_mask = GENMASK(21, 0), + .mul_shift = 24, + .frac_shift = 0, + .div2 = 1, +}; + +/* Layout for fractional PLLs. */ +static const struct clk_pll_layout pll_frac_layout = { + .mul_mask = GENMASK(31, 24), + .frac_mask = GENMASK(21, 0), + .mul_shift = 24, + .frac_shift = 0, +}; + +/* Layout for DIV PLLs. */ +static const struct clk_pll_layout pll_divpmc_layout = { + .div_mask = GENMASK(7, 0), + .endiv_mask = BIT(29), + .div_shift = 0, + .endiv_shift = 29, +}; + +/* Layout for DIV PLL ID PLLADIV2. */ +static const struct clk_pll_layout plladiv2_divpmc_layout = { + .div_mask = GENMASK(7, 0), + .endiv_mask = BIT(29), + .div_shift = 0, + .endiv_shift = 29, + .div2 = 1, +}; + +/* Layout for DIVIO dividers. */ +static const struct clk_pll_layout pll_divio_layout = { + .div_mask = GENMASK(19, 12), + .endiv_mask = BIT(30), + .div_shift = 12, + .endiv_shift = 30, +}; + +/* + * PLL clocks description + * @n: clock name + * @p: clock parent + * @l: clock layout + * @t: clock type + * @c: pll characteristics + * @f: clock flags + * @eid: export index in sam9x7->chws[] array + */ +static const struct { + const char *n; + const char *p; + const struct clk_pll_layout *l; + u8 t; + const struct clk_pll_characteristics *c; + unsigned long f; + u8 eid; +} sam9x7_plls[][3] = { + [PLL_ID_PLLA] = { + { + .n = "plla_fracck", + .p = "mainck", + .l = &plla_frac_layout, + .t = PLL_TYPE_FRAC, + /* + * This feeds plla_divpmcck which feeds CPU. It should + * not be disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + .c = &plla_characteristics, + }, + + { + .n = "plla_divpmcck", + .p = "plla_fracck", + .l = &pll_divpmc_layout, + .t = PLL_TYPE_DIV, + /* This feeds CPU. It should not be disabled */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + .eid = PMC_PLLACK, + .c = &plla_characteristics, + }, + }, + + [PLL_ID_UPLL] = { + { + .n = "upll_fracck", + .p = "main_osc", + .l = &pll_frac_layout, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + .c = &upll_characteristics, + }, + + { + .n = "upll_divpmcck", + .p = "upll_fracck", + .l = &pll_divpmc_layout, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_UTMI, + .c = &upll_characteristics, + }, + }, + + [PLL_ID_AUDIO] = { + { + .n = "audiopll_fracck", + .p = "main_osc", + .l = &pll_frac_layout, + .f = CLK_SET_RATE_GATE, + .c = &audiopll_characteristics, + .t = PLL_TYPE_FRAC, + }, + + { + .n = "audiopll_divpmcck", + .p = "audiopll_fracck", + .l = &pll_divpmc_layout, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .c = &audiopll_characteristics, + .eid = PMC_AUDIOPMCPLL, + .t = PLL_TYPE_DIV, + }, + + { + .n = "audiopll_diviock", + .p = "audiopll_fracck", + .l = &pll_divio_layout, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .c = &audiopll_characteristics, + .eid = PMC_AUDIOIOPLL, + .t = PLL_TYPE_DIV, + }, + }, + + [PLL_ID_LVDS] = { + { + .n = "lvdspll_fracck", + .p = "main_osc", + .l = &pll_frac_layout, + .f = CLK_SET_RATE_GATE, + .c = &lvdspll_characteristics, + .t = PLL_TYPE_FRAC, + }, + + { + .n = "lvdspll_divpmcck", + .p = "lvdspll_fracck", + .l = &pll_divpmc_layout, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .c = &lvdspll_characteristics, + .eid = PMC_LVDSPLL, + .t = PLL_TYPE_DIV, + }, + }, + + [PLL_ID_PLLA_DIV2] = { + { + .n = "plla_div2pmcck", + .p = "plla_fracck", + .l = &plladiv2_divpmc_layout, + /* + * This may feed critical parts of the system like timers. + * It should not be disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + .c = &plladiv2_characteristics, + .eid = PMC_PLLADIV2, + .t = PLL_TYPE_DIV, + }, + }, +}; + +static const struct clk_programmable_layout sam9x7_programmable_layout = { + .pres_mask = 0xff, + .pres_shift = 8, + .css_mask = 0x1f, + .have_slck_mck = 0, + .is_pres_direct = 1, +}; + +static const struct clk_pcr_layout sam9x7_pcr_layout = { + .offset = 0x88, + .cmd = BIT(31), + .gckcss_mask = GENMASK(12, 8), + .pid_mask = GENMASK(6, 0), +}; + +static const struct { + char *n; + char *p; + u8 id; + unsigned long flags; +} sam9x7_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, +}; + +/* + * Peripheral clocks description + * @n: clock name + * @f: clock flags + * @id: peripheral id + */ +static const struct { + char *n; + unsigned long f; + u8 id; +} sam9x7_periphck[] = { + { .n = "pioA_clk", .id = 2, }, + { .n = "pioB_clk", .id = 3, }, + { .n = "pioC_clk", .id = 4, }, + { .n = "flex0_clk", .id = 5, }, + { .n = "flex1_clk", .id = 6, }, + { .n = "flex2_clk", .id = 7, }, + { .n = "flex3_clk", .id = 8, }, + { .n = "flex6_clk", .id = 9, }, + { .n = "flex7_clk", .id = 10, }, + { .n = "flex8_clk", .id = 11, }, + { .n = "sdmmc0_clk", .id = 12, }, + { .n = "flex4_clk", .id = 13, }, + { .n = "flex5_clk", .id = 14, }, + { .n = "flex9_clk", .id = 15, }, + { .n = "flex10_clk", .id = 16, }, + { .n = "tcb0_clk", .id = 17, }, + { .n = "pwm_clk", .id = 18, }, + { .n = "adc_clk", .id = 19, }, + { .n = "dma0_clk", .id = 20, }, + { .n = "uhphs_clk", .id = 22, }, + { .n = "udphs_clk", .id = 23, }, + { .n = "gmac_clk", .id = 24, }, + { .n = "lcd_clk", .id = 25, }, + { .n = "sdmmc1_clk", .id = 26, }, + { .n = "ssc_clk", .id = 28, }, + { .n = "can0_clk", .id = 29, }, + { .n = "can1_clk", .id = 30, }, + { .n = "flex11_clk", .id = 32, }, + { .n = "flex12_clk", .id = 33, }, + { .n = "i2s_clk", .id = 34, }, + { .n = "qspi_clk", .id = 35, }, + { .n = "gfx2d_clk", .id = 36, }, + { .n = "pit64b0_clk", .id = 37, }, + { .n = "trng_clk", .id = 38, }, + { .n = "aes_clk", .id = 39, }, + { .n = "tdes_clk", .id = 40, }, + { .n = "sha_clk", .id = 41, }, + { .n = "classd_clk", .id = 42, }, + { .n = "isi_clk", .id = 43, }, + { .n = "pioD_clk", .id = 44, }, + { .n = "tcb1_clk", .id = 45, }, + { .n = "dbgu_clk", .id = 47, }, + { .n = "pmecc_clk", .id = 48, }, + /* + * mpddr_clk feeds DDR controller and is enabled by bootloader thus we + * need to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "mpddr_clk", .id = 49, .f = CLK_IS_CRITICAL }, + { .n = "csi2dc_clk", .id = 52, }, + { .n = "csi4l_clk", .id = 53, }, + { .n = "dsi4l_clk", .id = 54, }, + { .n = "lvdsc_clk", .id = 56, }, + { .n = "pit64b1_clk", .id = 58, }, + { .n = "puf_clk", .id = 59, }, +}; + +/* + * Generic clock description + * @n: clock name + * @pp: PLL parents + * @pp_mux_table: PLL parents mux table + * @r: clock output range + * @pp_chg_id: id in parent array of changeable PLL parent + * @pp_count: PLL parents count + * @id: clock id + */ +static const struct { + const char *n; + const char *pp[8]; + const char pp_mux_table[8]; + struct clk_range r; + int pp_chg_id; + u8 pp_count; + u8 id; +} sam9x7_gck[] = { + { + .n = "flex0_gclk", + .id = 5, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex1_gclk", + .id = 6, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex2_gclk", + .id = 7, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex3_gclk", + .id = 8, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex6_gclk", + .id = 9, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex7_gclk", + .id = 10, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex8_gclk", + .id = 11, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "sdmmc0_gclk", + .id = 12, + .r = { .max = 105000000 }, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex4_gclk", + .id = 13, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex5_gclk", + .id = 14, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex9_gclk", + .id = 15, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex10_gclk", + .id = 16, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "tcb0_gclk", + .id = 17, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "adc_gclk", + .id = 19, + .pp = { "upll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "gmac_gclk", + .id = 24, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "lcd_gclk", + .id = 25, + .r = { .max = 75000000 }, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "sdmmc1_gclk", + .id = 26, + .r = { .max = 105000000 }, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "mcan0_gclk", + .id = 29, + .r = { .max = 80000000 }, + .pp = { "upll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "mcan1_gclk", + .id = 30, + .r = { .max = 80000000 }, + .pp = { "upll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex11_gclk", + .id = 32, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "flex12_gclk", + .id = 33, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "i2s_gclk", + .id = 34, + .r = { .max = 100000000 }, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "qspi_gclk", + .id = 35, + .r = { .max = 200000000 }, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "pit64b0_gclk", + .id = 37, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "classd_gclk", + .id = 42, + .r = { .max = 100000000 }, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "tcb1_gclk", + .id = 45, + .pp = { "audiopll_divpmcck", "plla_div2pmcck", }, + .pp_mux_table = { 6, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, + }, + + { + .n = "dbgu_gclk", + .id = 47, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "mipiphy_gclk", + .id = 55, + .r = { .max = 27000000 }, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, + + { + .n = "pit64b1_gclk", + .id = 58, + .pp = { "plla_div2pmcck", }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, + }, +}; + +static void __init sam9x7_pmc_setup(struct device_node *np) +{ + struct clk_range range = CLK_RANGE(0, 0); + const char *td_slck_name, *md_slck_name, *mainxtal_name; + struct pmc_data *sam9x7_pmc; + const char *parent_names[9]; + void **clk_mux_buffer = NULL; + int clk_mux_buffer_size = 0; + struct clk_hw *main_osc_hw; + struct regmap *regmap; + struct clk_hw *hw; + int i, j; + + i = of_property_match_string(np, "clock-names", "td_slck"); + if (i < 0) + return; + + td_slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "md_slck"); + if (i < 0) + return; + + md_slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + sam9x7_pmc = pmc_data_allocate(PMC_LVDSPLL + 1, + nck(sam9x7_systemck), + nck(sam9x7_periphck), + nck(sam9x7_gck), 8); + if (!sam9x7_pmc) + return; + + clk_mux_buffer = kmalloc(sizeof(void *) * + (ARRAY_SIZE(sam9x7_gck)), + GFP_KERNEL); + if (!clk_mux_buffer) + goto err_free; + + hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 50000000); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, 0); + if (IS_ERR(hw)) + goto err_free; + main_osc_hw = hw; + + parent_names[0] = "main_rc_osc"; + parent_names[1] = "main_osc"; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); + if (IS_ERR(hw)) + goto err_free; + + sam9x7_pmc->chws[PMC_MAIN] = hw; + + for (i = 0; i < PLL_ID_MAX; i++) { + for (j = 0; j < 3; j++) { + struct clk_hw *parent_hw; + + if (!sam9x7_plls[i][j].n) + continue; + + switch (sam9x7_plls[i][j].t) { + case PLL_TYPE_FRAC: + if (!strcmp(sam9x7_plls[i][j].p, "mainck")) + parent_hw = sam9x7_pmc->chws[PMC_MAIN]; + else if (!strcmp(sam9x7_plls[i][j].p, "main_osc")) + parent_hw = main_osc_hw; + else + parent_hw = __clk_get_hw(of_clk_get_by_name + (np, sam9x7_plls[i][j].p)); + + hw = sam9x60_clk_register_frac_pll(regmap, + &pmc_pll_lock, + sam9x7_plls[i][j].n, + sam9x7_plls[i][j].p, + parent_hw, i, + sam9x7_plls[i][j].c, + sam9x7_plls[i][j].l, + sam9x7_plls[i][j].f); + break; + + case PLL_TYPE_DIV: + hw = sam9x60_clk_register_div_pll(regmap, + &pmc_pll_lock, + sam9x7_plls[i][j].n, + sam9x7_plls[i][j].p, NULL, i, + sam9x7_plls[i][j].c, + sam9x7_plls[i][j].l, + sam9x7_plls[i][j].f, 0); + break; + + default: + continue; + } + + if (IS_ERR(hw)) + goto err_free; + + if (sam9x7_plls[i][j].eid) + sam9x7_pmc->chws[sam9x7_plls[i][j].eid] = hw; + } + } + + parent_names[0] = md_slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plla_divpmcck"; + parent_names[3] = "upll_divpmcck"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, &sam9x7_master_layout, + &mck_characteristics, &mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, &sam9x7_master_layout, + &mck_characteristics, &mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + sam9x7_pmc->chws[PMC_MCK] = hw; + + parent_names[0] = "plla_divpmcck"; + parent_names[1] = "upll_divpmcck"; + parent_names[2] = "main_osc"; + hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 3); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = md_slck_name; + parent_names[1] = td_slck_name; + parent_names[2] = "mainck"; + parent_names[3] = "masterck_div"; + parent_names[4] = "plla_divpmcck"; + parent_names[5] = "upll_divpmcck"; + parent_names[6] = "audiopll_divpmcck"; + for (i = 0; i < 2; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 7, i, + &sam9x7_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + sam9x7_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sam9x7_systemck); i++) { + hw = at91_clk_register_system(regmap, sam9x7_systemck[i].n, + sam9x7_systemck[i].p, NULL, + sam9x7_systemck[i].id, + sam9x7_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sam9x7_pmc->shws[sam9x7_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sam9x7_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sam9x7_pcr_layout, + sam9x7_periphck[i].n, + "masterck_div", NULL, + sam9x7_periphck[i].id, + &range, INT_MIN, + sam9x7_periphck[i].f); + if (IS_ERR(hw)) + goto err_free; + + sam9x7_pmc->phws[sam9x7_periphck[i].id] = hw; + } + + parent_names[0] = md_slck_name; + parent_names[1] = td_slck_name; + parent_names[2] = "mainck"; + parent_names[3] = "masterck_div"; + for (i = 0; i < ARRAY_SIZE(sam9x7_gck); i++) { + u8 num_parents = 4 + sam9x7_gck[i].pp_count; + u32 *mux_table; + + mux_table = kmalloc_array(num_parents, sizeof(*mux_table), + GFP_KERNEL); + if (!mux_table) + goto err_free; + + PMC_INIT_TABLE(mux_table, 4); + PMC_FILL_TABLE(&mux_table[4], sam9x7_gck[i].pp_mux_table, + sam9x7_gck[i].pp_count); + PMC_FILL_TABLE(&parent_names[4], sam9x7_gck[i].pp, + sam9x7_gck[i].pp_count); + + hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, + &sam9x7_pcr_layout, + sam9x7_gck[i].n, + parent_names, NULL, mux_table, + num_parents, + sam9x7_gck[i].id, + &sam9x7_gck[i].r, + sam9x7_gck[i].pp_chg_id); + if (IS_ERR(hw)) + goto err_free; + + sam9x7_pmc->ghws[sam9x7_gck[i].id] = hw; + clk_mux_buffer[clk_mux_buffer_size++] = mux_table; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sam9x7_pmc); + kfree(clk_mux_buffer); + + return; + +err_free: + if (clk_mux_buffer) { + for (i = 0; i < clk_mux_buffer_size; i++) + kfree(clk_mux_buffer[i]); + kfree(clk_mux_buffer); + } + kfree(sam9x7_pmc); +} + +/* Some clks are used for a clocksource */ +CLK_OF_DECLARE(sam9x7_pmc, "microchip,sam9x7-pmc", sam9x7_pmc_setup); diff --git a/drivers/clk/at91/sama5d2.c b/drivers/clk/at91/sama5d2.c new file mode 100644 index 000000000..c16594fce --- /dev/null +++ b/drivers/clk/at91/sama5d2.c @@ -0,0 +1,399 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(mck_lock); + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 124000000, .max = 166000000 }, + .divisors = { 1, 2, 4, 3 }, +}; + +static u8 plla_out[] = { 0 }; + +static u16 plla_icpll[] = { 0 }; + +static const struct clk_range plla_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 12000000, .max = 24000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .icpll = plla_icpll, + .out = plla_out, +}; + +static const struct clk_pcr_layout sama5d2_pcr_layout = { + .offset = 0x10c, + .cmd = BIT(12), + .gckcss_mask = GENMASK(10, 8), + .pid_mask = GENMASK(6, 0), +}; + +static const struct { + char *n; + char *p; + unsigned long flags; + u8 id; +} sama5d2_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "lcdck", .p = "masterck_div", .id = 3 }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, + { .n = "pck2", .p = "prog2", .id = 10 }, + { .n = "iscck", .p = "masterck_div", .id = 18 }, +}; + +static const struct { + char *n; + u8 id; + struct clk_range r; +} sama5d2_periph32ck[] = { + { .n = "macb0_clk", .id = 5, .r = { .min = 0, .max = 83000000 }, }, + { .n = "tdes_clk", .id = 11, .r = { .min = 0, .max = 83000000 }, }, + { .n = "matrix1_clk", .id = 14, }, + { .n = "hsmc_clk", .id = 17, }, + { .n = "pioA_clk", .id = 18, .r = { .min = 0, .max = 83000000 }, }, + { .n = "flx0_clk", .id = 19, .r = { .min = 0, .max = 83000000 }, }, + { .n = "flx1_clk", .id = 20, .r = { .min = 0, .max = 83000000 }, }, + { .n = "flx2_clk", .id = 21, .r = { .min = 0, .max = 83000000 }, }, + { .n = "flx3_clk", .id = 22, .r = { .min = 0, .max = 83000000 }, }, + { .n = "flx4_clk", .id = 23, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uart0_clk", .id = 24, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uart1_clk", .id = 25, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uart2_clk", .id = 26, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uart3_clk", .id = 27, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uart4_clk", .id = 28, .r = { .min = 0, .max = 83000000 }, }, + { .n = "twi0_clk", .id = 29, .r = { .min = 0, .max = 83000000 }, }, + { .n = "twi1_clk", .id = 30, .r = { .min = 0, .max = 83000000 }, }, + { .n = "spi0_clk", .id = 33, .r = { .min = 0, .max = 83000000 }, }, + { .n = "spi1_clk", .id = 34, .r = { .min = 0, .max = 83000000 }, }, + { .n = "tcb0_clk", .id = 35, .r = { .min = 0, .max = 83000000 }, }, + { .n = "tcb1_clk", .id = 36, .r = { .min = 0, .max = 83000000 }, }, + { .n = "pwm_clk", .id = 38, .r = { .min = 0, .max = 83000000 }, }, + { .n = "adc_clk", .id = 40, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uhphs_clk", .id = 41, .r = { .min = 0, .max = 83000000 }, }, + { .n = "udphs_clk", .id = 42, .r = { .min = 0, .max = 83000000 }, }, + { .n = "ssc0_clk", .id = 43, .r = { .min = 0, .max = 83000000 }, }, + { .n = "ssc1_clk", .id = 44, .r = { .min = 0, .max = 83000000 }, }, + { .n = "trng_clk", .id = 47, .r = { .min = 0, .max = 83000000 }, }, + { .n = "pdmic_clk", .id = 48, .r = { .min = 0, .max = 83000000 }, }, + { .n = "securam_clk", .id = 51, }, + { .n = "i2s0_clk", .id = 54, .r = { .min = 0, .max = 83000000 }, }, + { .n = "i2s1_clk", .id = 55, .r = { .min = 0, .max = 83000000 }, }, + { .n = "can0_clk", .id = 56, .r = { .min = 0, .max = 83000000 }, }, + { .n = "can1_clk", .id = 57, .r = { .min = 0, .max = 83000000 }, }, + { .n = "ptc_clk", .id = 58, .r = { .min = 0, .max = 83000000 }, }, + { .n = "classd_clk", .id = 59, .r = { .min = 0, .max = 83000000 }, }, +}; + +static const struct { + char *n; + unsigned long flags; + u8 id; +} sama5d2_periphck[] = { + { .n = "dma0_clk", .id = 6, }, + { .n = "dma1_clk", .id = 7, }, + { .n = "aes_clk", .id = 9, }, + { .n = "aesb_clk", .id = 10, }, + { .n = "sha_clk", .id = 12, }, + /* + * mpddr_clk feeds DDR controller and is enabled by bootloader thus we + * need to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "mpddr_clk", .id = 13, .flags = CLK_IS_CRITICAL }, + { .n = "matrix0_clk", .id = 15, }, + { .n = "sdmmc0_hclk", .id = 31, }, + { .n = "sdmmc1_hclk", .id = 32, }, + { .n = "lcdc_clk", .id = 45, }, + { .n = "isc_clk", .id = 46, }, + { .n = "qspi0_clk", .id = 52, }, + { .n = "qspi1_clk", .id = 53, }, +}; + +static const struct { + char *n; + u8 id; + struct clk_range r; + int chg_pid; +} sama5d2_gck[] = { + { .n = "flx0_gclk", .id = 19, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "flx1_gclk", .id = 20, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "flx2_gclk", .id = 21, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "flx3_gclk", .id = 22, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "flx4_gclk", .id = 23, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "uart0_gclk", .id = 24, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "uart1_gclk", .id = 25, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "uart2_gclk", .id = 26, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "uart3_gclk", .id = 27, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "uart4_gclk", .id = 28, .chg_pid = INT_MIN, .r = { .min = 0, .max = 27666666 }, }, + { .n = "sdmmc0_gclk", .id = 31, .chg_pid = INT_MIN, }, + { .n = "sdmmc1_gclk", .id = 32, .chg_pid = INT_MIN, }, + { .n = "tcb0_gclk", .id = 35, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, }, + { .n = "tcb1_gclk", .id = 36, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, }, + { .n = "pwm_gclk", .id = 38, .chg_pid = INT_MIN, .r = { .min = 0, .max = 83000000 }, }, + { .n = "isc_gclk", .id = 46, .chg_pid = INT_MIN, }, + { .n = "pdmic_gclk", .id = 48, .chg_pid = INT_MIN, }, + { .n = "i2s0_gclk", .id = 54, .chg_pid = 5, }, + { .n = "i2s1_gclk", .id = 55, .chg_pid = 5, }, + { .n = "can0_gclk", .id = 56, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, }, + { .n = "can1_gclk", .id = 57, .chg_pid = INT_MIN, .r = { .min = 0, .max = 80000000 }, }, + { .n = "classd_gclk", .id = 59, .chg_pid = 5, .r = { .min = 0, .max = 100000000 }, }, +}; + +static const struct clk_programmable_layout sama5d2_programmable_layout = { + .pres_mask = 0xff, + .pres_shift = 4, + .css_mask = 0x7, + .have_slck_mck = 0, + .is_pres_direct = 1, +}; + +static void __init sama5d2_pmc_setup(struct device_node *np) +{ + struct clk_range range = CLK_RANGE(0, 0); + const char *slck_name, *mainxtal_name; + struct pmc_data *sama5d2_pmc; + const char *parent_names[6]; + struct regmap *regmap, *regmap_sfr; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_clk"); + if (i < 0) + return; + + slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + sama5d2_pmc = pmc_data_allocate(PMC_AUDIOPINCK + 1, + nck(sama5d2_systemck), + nck(sama5d2_periph32ck), + nck(sama5d2_gck), 3); + if (!sama5d2_pmc) + return; + + hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 100000000); + if (IS_ERR(hw)) + goto err_free; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = "main_rc_osc"; + parent_names[1] = "main_osc"; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_MAIN] = hw; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &sama5d3_pll_layout, &plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_audio_pll_frac(regmap, "audiopll_fracck", + "mainck"); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_audio_pll_pad(regmap, "audiopll_padck", + "audiopll_fracck"); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_AUDIOPINCK] = hw; + + hw = at91_clk_register_audio_pll_pmc(regmap, "audiopll_pmcck", + "audiopll_fracck"); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_AUDIOPLLCK] = hw; + + regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr"); + if (IS_ERR(regmap_sfr)) + regmap_sfr = NULL; + + hw = at91_clk_register_utmi(regmap, regmap_sfr, "utmick", "mainck", NULL); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_MCK] = hw; + + hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div"); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_MCK2] = hw; + + parent_names[0] = "plladivck"; + parent_names[1] = "utmick"; + hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + parent_names[4] = "masterck_div"; + parent_names[5] = "audiopll_pmcck"; + for (i = 0; i < 3; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 6, i, + &sama5d2_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d2_systemck); i++) { + hw = at91_clk_register_system(regmap, sama5d2_systemck[i].n, + sama5d2_systemck[i].p, NULL, + sama5d2_systemck[i].id, + sama5d2_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->shws[sama5d2_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d2_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sama5d2_pcr_layout, + sama5d2_periphck[i].n, + "masterck_div", NULL, + sama5d2_periphck[i].id, + &range, INT_MIN, + sama5d2_periphck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->phws[sama5d2_periphck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d2_periph32ck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sama5d2_pcr_layout, + sama5d2_periph32ck[i].n, + "h32mxck", NULL, + sama5d2_periph32ck[i].id, + &sama5d2_periph32ck[i].r, + INT_MIN, 0); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->phws[sama5d2_periph32ck[i].id] = hw; + } + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + parent_names[4] = "masterck_div"; + parent_names[5] = "audiopll_pmcck"; + for (i = 0; i < ARRAY_SIZE(sama5d2_gck); i++) { + hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, + &sama5d2_pcr_layout, + sama5d2_gck[i].n, + parent_names, NULL, NULL, 6, + sama5d2_gck[i].id, + &sama5d2_gck[i].r, + sama5d2_gck[i].chg_pid); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->ghws[sama5d2_gck[i].id] = hw; + } + + if (regmap_sfr) { + parent_names[0] = "i2s0_clk"; + parent_names[1] = "i2s0_gclk"; + hw = at91_clk_i2s_mux_register(regmap_sfr, "i2s0_muxclk", + parent_names, 2, 0); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_I2S0_MUX] = hw; + + parent_names[0] = "i2s1_clk"; + parent_names[1] = "i2s1_gclk"; + hw = at91_clk_i2s_mux_register(regmap_sfr, "i2s1_muxclk", + parent_names, 2, 1); + if (IS_ERR(hw)) + goto err_free; + + sama5d2_pmc->chws[PMC_I2S1_MUX] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d2_pmc); + + return; + +err_free: + kfree(sama5d2_pmc); +} + +CLK_OF_DECLARE(sama5d2_pmc, "atmel,sama5d2-pmc", sama5d2_pmc_setup); diff --git a/drivers/clk/at91/sama5d3.c b/drivers/clk/at91/sama5d3.c new file mode 100644 index 000000000..522ce6031 --- /dev/null +++ b/drivers/clk/at91/sama5d3.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(mck_lock); + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 0, .max = 166000000 }, + .divisors = { 1, 2, 4, 3 }, +}; + +static u8 plla_out[] = { 0 }; + +static u16 plla_icpll[] = { 0 }; + +static const struct clk_range plla_outputs[] = { + { .min = 400000000, .max = 1000000000 }, +}; + +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 8000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .icpll = plla_icpll, + .out = plla_out, +}; + +static const struct clk_pcr_layout sama5d3_pcr_layout = { + .offset = 0x10c, + .cmd = BIT(12), + .pid_mask = GENMASK(6, 0), + .div_mask = GENMASK(17, 16), +}; + +static const struct { + char *n; + char *p; + unsigned long flags; + u8 id; +} sama5d3_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "lcdck", .p = "masterck_div", .id = 3 }, + { .n = "smdck", .p = "smdclk", .id = 4 }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, + { .n = "pck2", .p = "prog2", .id = 10 }, +}; + +static const struct { + char *n; + u8 id; + struct clk_range r; + unsigned long flags; +} sama5d3_periphck[] = { + { .n = "dbgu_clk", .id = 2, }, + { .n = "hsmc_clk", .id = 5, }, + { .n = "pioA_clk", .id = 6, }, + { .n = "pioB_clk", .id = 7, }, + { .n = "pioC_clk", .id = 8, }, + { .n = "pioD_clk", .id = 9, }, + { .n = "pioE_clk", .id = 10, }, + { .n = "usart0_clk", .id = 12, .r = { .min = 0, .max = 83000000 }, }, + { .n = "usart1_clk", .id = 13, .r = { .min = 0, .max = 83000000 }, }, + { .n = "usart2_clk", .id = 14, .r = { .min = 0, .max = 83000000 }, }, + { .n = "usart3_clk", .id = 15, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uart0_clk", .id = 16, .r = { .min = 0, .max = 83000000 }, }, + { .n = "uart1_clk", .id = 17, .r = { .min = 0, .max = 83000000 }, }, + { .n = "twi0_clk", .id = 18, .r = { .min = 0, .max = 41500000 }, }, + { .n = "twi1_clk", .id = 19, .r = { .min = 0, .max = 41500000 }, }, + { .n = "twi2_clk", .id = 20, .r = { .min = 0, .max = 41500000 }, }, + { .n = "mci0_clk", .id = 21, }, + { .n = "mci1_clk", .id = 22, }, + { .n = "mci2_clk", .id = 23, }, + { .n = "spi0_clk", .id = 24, .r = { .min = 0, .max = 166000000 }, }, + { .n = "spi1_clk", .id = 25, .r = { .min = 0, .max = 166000000 }, }, + { .n = "tcb0_clk", .id = 26, .r = { .min = 0, .max = 166000000 }, }, + { .n = "tcb1_clk", .id = 27, .r = { .min = 0, .max = 166000000 }, }, + { .n = "pwm_clk", .id = 28, }, + { .n = "adc_clk", .id = 29, .r = { .min = 0, .max = 83000000 }, }, + { .n = "dma0_clk", .id = 30, }, + { .n = "dma1_clk", .id = 31, }, + { .n = "uhphs_clk", .id = 32, }, + { .n = "udphs_clk", .id = 33, }, + { .n = "macb0_clk", .id = 34, }, + { .n = "macb1_clk", .id = 35, }, + { .n = "lcdc_clk", .id = 36, }, + { .n = "isi_clk", .id = 37, }, + { .n = "ssc0_clk", .id = 38, .r = { .min = 0, .max = 83000000 }, }, + { .n = "ssc1_clk", .id = 39, .r = { .min = 0, .max = 83000000 }, }, + { .n = "can0_clk", .id = 40, .r = { .min = 0, .max = 83000000 }, }, + { .n = "can1_clk", .id = 41, .r = { .min = 0, .max = 83000000 }, }, + { .n = "sha_clk", .id = 42, }, + { .n = "aes_clk", .id = 43, }, + { .n = "tdes_clk", .id = 44, }, + { .n = "trng_clk", .id = 45, }, + { .n = "fuse_clk", .id = 48, }, + /* + * mpddr_clk feeds DDR controller and is enabled by bootloader thus we + * need to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "mpddr_clk", .id = 49, .flags = CLK_IS_CRITICAL }, +}; + +static void __init sama5d3_pmc_setup(struct device_node *np) +{ + const char *slck_name, *mainxtal_name; + struct pmc_data *sama5d3_pmc; + const char *parent_names[5]; + struct regmap *regmap; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_clk"); + if (i < 0) + return; + + slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + sama5d3_pmc = pmc_data_allocate(PMC_PLLACK + 1, + nck(sama5d3_systemck), + nck(sama5d3_periphck), 0, 3); + if (!sama5d3_pmc) + return; + + hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 50000000); + if (IS_ERR(hw)) + goto err_free; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = "main_rc_osc"; + parent_names[1] = "main_osc"; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &sama5d3_pll_layout, &plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); + if (IS_ERR(hw)) + goto err_free; + + sama5d3_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL); + if (IS_ERR(hw)) + goto err_free; + + sama5d3_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + sama5d3_pmc->chws[PMC_MCK] = hw; + + parent_names[0] = "plladivck"; + parent_names[1] = "utmick"; + hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + parent_names[4] = "masterck_div"; + for (i = 0; i < 3; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 5, i, + &at91sam9x5_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + sama5d3_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d3_systemck); i++) { + hw = at91_clk_register_system(regmap, sama5d3_systemck[i].n, + sama5d3_systemck[i].p, NULL, + sama5d3_systemck[i].id, + sama5d3_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sama5d3_pmc->shws[sama5d3_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d3_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sama5d3_pcr_layout, + sama5d3_periphck[i].n, + "masterck_div", NULL, + sama5d3_periphck[i].id, + &sama5d3_periphck[i].r, + INT_MIN, + sama5d3_periphck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sama5d3_pmc->phws[sama5d3_periphck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d3_pmc); + + return; + +err_free: + kfree(sama5d3_pmc); +} +/* + * The TCB is used as the clocksource so its clock is needed early. This means + * this can't be a platform driver. + */ +CLK_OF_DECLARE(sama5d3_pmc, "atmel,sama5d3-pmc", sama5d3_pmc_setup); diff --git a/drivers/clk/at91/sama5d4.c b/drivers/clk/at91/sama5d4.c new file mode 100644 index 000000000..160c0bddb --- /dev/null +++ b/drivers/clk/at91/sama5d4.c @@ -0,0 +1,301 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(mck_lock); + +static const struct clk_master_characteristics mck_characteristics = { + .output = { .min = 125000000, .max = 200000000 }, + .divisors = { 1, 2, 4, 3 }, +}; + +static u8 plla_out[] = { 0 }; + +static u16 plla_icpll[] = { 0 }; + +static const struct clk_range plla_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +static const struct clk_pll_characteristics plla_characteristics = { + .input = { .min = 12000000, .max = 12000000 }, + .num_output = ARRAY_SIZE(plla_outputs), + .output = plla_outputs, + .icpll = plla_icpll, + .out = plla_out, +}; + +static const struct clk_pcr_layout sama5d4_pcr_layout = { + .offset = 0x10c, + .cmd = BIT(12), + .pid_mask = GENMASK(6, 0), +}; + +static const struct { + char *n; + char *p; + unsigned long flags; + u8 id; +} sama5d4_systemck[] = { + /* + * ddrck feeds DDR controller and is enabled by bootloader thus we need + * to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "ddrck", .p = "masterck_div", .id = 2, .flags = CLK_IS_CRITICAL }, + { .n = "lcdck", .p = "masterck_div", .id = 3 }, + { .n = "smdck", .p = "smdclk", .id = 4 }, + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "udpck", .p = "usbck", .id = 7 }, + { .n = "pck0", .p = "prog0", .id = 8 }, + { .n = "pck1", .p = "prog1", .id = 9 }, + { .n = "pck2", .p = "prog2", .id = 10 }, +}; + +static const struct { + char *n; + u8 id; +} sama5d4_periph32ck[] = { + { .n = "pioD_clk", .id = 5 }, + { .n = "usart0_clk", .id = 6 }, + { .n = "usart1_clk", .id = 7 }, + { .n = "icm_clk", .id = 9 }, + { .n = "aes_clk", .id = 12 }, + { .n = "tdes_clk", .id = 14 }, + { .n = "sha_clk", .id = 15 }, + { .n = "matrix1_clk", .id = 17 }, + { .n = "hsmc_clk", .id = 22 }, + { .n = "pioA_clk", .id = 23 }, + { .n = "pioB_clk", .id = 24 }, + { .n = "pioC_clk", .id = 25 }, + { .n = "pioE_clk", .id = 26 }, + { .n = "uart0_clk", .id = 27 }, + { .n = "uart1_clk", .id = 28 }, + { .n = "usart2_clk", .id = 29 }, + { .n = "usart3_clk", .id = 30 }, + { .n = "usart4_clk", .id = 31 }, + { .n = "twi0_clk", .id = 32 }, + { .n = "twi1_clk", .id = 33 }, + { .n = "twi2_clk", .id = 34 }, + { .n = "mci0_clk", .id = 35 }, + { .n = "mci1_clk", .id = 36 }, + { .n = "spi0_clk", .id = 37 }, + { .n = "spi1_clk", .id = 38 }, + { .n = "spi2_clk", .id = 39 }, + { .n = "tcb0_clk", .id = 40 }, + { .n = "tcb1_clk", .id = 41 }, + { .n = "tcb2_clk", .id = 42 }, + { .n = "pwm_clk", .id = 43 }, + { .n = "adc_clk", .id = 44 }, + { .n = "dbgu_clk", .id = 45 }, + { .n = "uhphs_clk", .id = 46 }, + { .n = "udphs_clk", .id = 47 }, + { .n = "ssc0_clk", .id = 48 }, + { .n = "ssc1_clk", .id = 49 }, + { .n = "trng_clk", .id = 53 }, + { .n = "macb0_clk", .id = 54 }, + { .n = "macb1_clk", .id = 55 }, + { .n = "fuse_clk", .id = 57 }, + { .n = "securam_clk", .id = 59 }, + { .n = "smd_clk", .id = 61 }, + { .n = "twi3_clk", .id = 62 }, + { .n = "catb_clk", .id = 63 }, +}; + +static const struct { + char *n; + unsigned long flags; + u8 id; +} sama5d4_periphck[] = { + { .n = "dma0_clk", .id = 8 }, + { .n = "cpkcc_clk", .id = 10 }, + { .n = "aesb_clk", .id = 13 }, + /* + * mpddr_clk feeds DDR controller and is enabled by bootloader thus we + * need to keep it enabled in case there is no Linux consumer for it. + */ + { .n = "mpddr_clk", .id = 16, .flags = CLK_IS_CRITICAL }, + { .n = "matrix0_clk", .id = 18 }, + { .n = "vdec_clk", .id = 19 }, + { .n = "dma1_clk", .id = 50 }, + { .n = "lcdc_clk", .id = 51 }, + { .n = "isi_clk", .id = 52 }, +}; + +static void __init sama5d4_pmc_setup(struct device_node *np) +{ + struct clk_range range = CLK_RANGE(0, 0); + const char *slck_name, *mainxtal_name; + struct pmc_data *sama5d4_pmc; + const char *parent_names[5]; + struct regmap *regmap; + struct clk_hw *hw; + int i; + bool bypass; + + i = of_property_match_string(np, "clock-names", "slow_clk"); + if (i < 0) + return; + + slck_name = of_clk_get_parent_name(np, i); + + i = of_property_match_string(np, "clock-names", "main_xtal"); + if (i < 0) + return; + mainxtal_name = of_clk_get_parent_name(np, i); + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + sama5d4_pmc = pmc_data_allocate(PMC_PLLACK + 1, + nck(sama5d4_systemck), + nck(sama5d4_periph32ck), 0, 3); + if (!sama5d4_pmc) + return; + + hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 100000000); + if (IS_ERR(hw)) + goto err_free; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + hw = at91_clk_register_main_osc(regmap, "main_osc", mainxtal_name, NULL, + bypass); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = "main_rc_osc"; + parent_names[1] = "main_osc"; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", parent_names, NULL, 2); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_pll(regmap, "pllack", "mainck", 0, + &sama5d3_pll_layout, &plla_characteristics); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_plldiv(regmap, "plladivck", "pllack"); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->chws[PMC_PLLACK] = hw; + + hw = at91_clk_register_utmi(regmap, NULL, "utmick", "mainck", NULL); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->chws[PMC_UTMI] = hw; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + hw = at91_clk_register_master_pres(regmap, "masterck_pres", 4, + parent_names, NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock); + if (IS_ERR(hw)) + goto err_free; + + hw = at91_clk_register_master_div(regmap, "masterck_div", + "masterck_pres", NULL, + &at91sam9x5_master_layout, + &mck_characteristics, &mck_lock, + CLK_SET_RATE_GATE, 0); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->chws[PMC_MCK] = hw; + + hw = at91_clk_register_h32mx(regmap, "h32mxck", "masterck_div"); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->chws[PMC_MCK2] = hw; + + parent_names[0] = "plladivck"; + parent_names[1] = "utmick"; + hw = at91sam9x5_clk_register_usb(regmap, "usbck", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = "plladivck"; + parent_names[1] = "utmick"; + hw = at91sam9x5_clk_register_smd(regmap, "smdclk", parent_names, 2); + if (IS_ERR(hw)) + goto err_free; + + parent_names[0] = slck_name; + parent_names[1] = "mainck"; + parent_names[2] = "plladivck"; + parent_names[3] = "utmick"; + parent_names[4] = "masterck_div"; + for (i = 0; i < 3; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, + parent_names, NULL, 5, i, + &at91sam9x5_programmable_layout, + NULL); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d4_systemck); i++) { + hw = at91_clk_register_system(regmap, sama5d4_systemck[i].n, + sama5d4_systemck[i].p, NULL, + sama5d4_systemck[i].id, + sama5d4_systemck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->shws[sama5d4_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d4_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sama5d4_pcr_layout, + sama5d4_periphck[i].n, + "masterck_div", NULL, + sama5d4_periphck[i].id, + &range, INT_MIN, + sama5d4_periphck[i].flags); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->phws[sama5d4_periphck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama5d4_periph32ck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sama5d4_pcr_layout, + sama5d4_periph32ck[i].n, + "h32mxck", NULL, + sama5d4_periph32ck[i].id, + &range, INT_MIN, 0); + if (IS_ERR(hw)) + goto err_free; + + sama5d4_pmc->phws[sama5d4_periph32ck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama5d4_pmc); + + return; + +err_free: + kfree(sama5d4_pmc); +} + +CLK_OF_DECLARE(sama5d4_pmc, "atmel,sama5d4-pmc", sama5d4_pmc_setup); diff --git a/drivers/clk/at91/sama7d65.c b/drivers/clk/at91/sama7d65.c new file mode 100644 index 000000000..ba8ff413f --- /dev/null +++ b/drivers/clk/at91/sama7d65.c @@ -0,0 +1,1380 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SAMA7D65 PMC code. + * + * Copyright (C) 2024 Microchip Technology Inc. and its subsidiaries + * + * Author: Ryan Wanner <ryan.wanner@microchip.com> + */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(pmc_pll_lock); +static DEFINE_SPINLOCK(pmc_mck0_lock); +static DEFINE_SPINLOCK(pmc_mckX_lock); + +#define PMC_INDEX_MAX 25 + +/* + * PLL clocks identifiers + * @PLL_ID_CPU: CPU PLL identifier + * @PLL_ID_SYS: System PLL identifier + * @PLL_ID_DDR: DDR PLL identifier + * @PLL_ID_GPU: Graphics subsystem PLL identifier + * @PLL_ID_BAUD: Baud PLL identifier + * @PLL_ID_AUDIO: Audio PLL identifier + * @PLL_ID_ETH: Ethernet PLL identifier + * @PLL_ID_LVDS: LVDS PLL identifier + * @PLL_ID_USB: USB PLL identifier + */ +enum pll_ids { + PLL_ID_CPU, + PLL_ID_SYS, + PLL_ID_DDR, + PLL_ID_GPU, + PLL_ID_BAUD, + PLL_ID_AUDIO, + PLL_ID_ETH, + PLL_ID_LVDS, + PLL_ID_USB, + PLL_ID_MAX +}; + +/* + * PLL component identifier + * @PLL_COMPID_FRAC: Fractional PLL component identifier + * @PLL_COMPID_DIV0: 1st PLL divider component identifier + * @PLL_COMPID_DIV1: 2nd PLL divider component identifier + */ +enum pll_component_id { + PLL_COMPID_FRAC, + PLL_COMPID_DIV0, + PLL_COMPID_DIV1, + PLL_COMPID_MAX +}; + +/* + * PLL type identifiers + * @PLL_TYPE_FRAC: fractional PLL identifier + * @PLL_TYPE_DIV: divider PLL identifier + */ +enum pll_type { + PLL_TYPE_FRAC, + PLL_TYPE_DIV +}; + +/* Layout for fractional PLLs. */ +static const struct clk_pll_layout pll_layout_frac = { + .mul_mask = GENMASK(31, 24), + .frac_mask = GENMASK(21, 0), + .mul_shift = 24, + .frac_shift = 0, +}; + +/* Layout for DIVPMC dividers. */ +static const struct clk_pll_layout pll_layout_divpmc = { + .div_mask = GENMASK(7, 0), + .endiv_mask = BIT(29), + .div_shift = 0, + .endiv_shift = 29, +}; + +/* Layout for DIVIO dividers. */ +static const struct clk_pll_layout pll_layout_divio = { + .div_mask = GENMASK(19, 12), + .endiv_mask = BIT(30), + .div_shift = 12, + .endiv_shift = 30, +}; + +/* + * CPU PLL output range. + * Notice: The upper limit has been setup to 1000000002 due to hardware + * block which cannot output exactly 1GHz. + */ +static const struct clk_range cpu_pll_outputs[] = { + { .min = 2343750, .max = 1000000002 }, +}; + +/* PLL output range. */ +static const struct clk_range pll_outputs[] = { + { .min = 2343750, .max = 1200000000 }, +}; + +/* + * Min: fCOREPLLCK = 600 MHz, PMC_PLL_CTRL0.DIVPMC = 255 + * Max: fCOREPLLCK = 800 MHz, PMC_PLL_CTRL0.DIVPMC = 0 + */ +static const struct clk_range lvdspll_outputs[] = { + { .min = 16406250, .max = 800000000 }, +}; + +static const struct clk_range upll_outputs[] = { + { .min = 480000000, .max = 480000000 }, +}; + +/* Fractional PLL core output range. */ +static const struct clk_range core_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +static const struct clk_range lvdspll_core_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +static const struct clk_range upll_core_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +/* CPU PLL characteristics. */ +static const struct clk_pll_characteristics cpu_pll_characteristics = { + .input = { .min = 12000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(cpu_pll_outputs), + .output = cpu_pll_outputs, + .core_output = core_outputs, + .acr = UL(0x00070010), +}; + +/* PLL characteristics. */ +static const struct clk_pll_characteristics pll_characteristics = { + .input = { .min = 12000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(pll_outputs), + .output = pll_outputs, + .core_output = core_outputs, + .acr = UL(0x00070010), +}; + +static const struct clk_pll_characteristics lvdspll_characteristics = { + .input = { .min = 12000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(lvdspll_outputs), + .output = lvdspll_outputs, + .core_output = lvdspll_core_outputs, + .acr = UL(0x00070010), +}; + +static const struct clk_pll_characteristics upll_characteristics = { + .input = { .min = 20000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(upll_outputs), + .output = upll_outputs, + .core_output = upll_core_outputs, + .acr = UL(0x12020010), + .upll = true, +}; + +/* + * SAMA7D65 PLL possible parents + * @SAMA7D65_PLL_PARENT_MAINCK: MAINCK is PLL a parent + * @SAMA7D65_PLL_PARENT_MAIN_XTAL: MAIN XTAL is a PLL parent + * @SAMA7D65_PLL_PARENT_FRACCK: Frac PLL is a PLL parent (for PLL dividers) + */ +enum sama7d65_pll_parent { + SAMA7D65_PLL_PARENT_MAINCK, + SAMA7D65_PLL_PARENT_MAIN_XTAL, + SAMA7D65_PLL_PARENT_FRACCK +}; + +/* + * PLL clocks description + * @n: clock name + * @l: clock layout + * @c: clock characteristics + * @hw: pointer to clk_hw + * @t: clock type + * @f: clock flags + * @p: clock parent + * @eid: export index in sama7d65->chws[] array + * @safe_div: intermediate divider need to be set on PRE_RATE_CHANGE + * notification + */ +static struct sama7d65_pll { + const char *n; + const struct clk_pll_layout *l; + const struct clk_pll_characteristics *c; + struct clk_hw *hw; + unsigned long f; + enum sama7d65_pll_parent p; + u8 t; + u8 eid; + u8 safe_div; +} sama7d65_plls[][PLL_COMPID_MAX] = { + [PLL_ID_CPU] = { + [PLL_COMPID_FRAC] = { + .n = "cpupll_fracck", + .p = SAMA7D65_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &cpu_pll_characteristics, + .t = PLL_TYPE_FRAC, + /* + * This feeds cpupll_divpmcck which feeds CPU. It should + * not be disabled. + */ + .f = CLK_IS_CRITICAL, + }, + + [PLL_COMPID_DIV0] = { + .n = "cpupll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &cpu_pll_characteristics, + .t = PLL_TYPE_DIV, + /* This feeds CPU. It should not be disabled. */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_PARENT, + .eid = PMC_CPUPLL, + /* + * Safe div=15 should be safe even for switching b/w 1GHz and + * 90MHz (frac pll might go up to 1.2GHz). + */ + .safe_div = 15, + }, + }, + + [PLL_ID_SYS] = { + [PLL_COMPID_FRAC] = { + .n = "syspll_fracck", + .p = SAMA7D65_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + /* + * This feeds syspll_divpmcck which may feed critical parts + * of the systems like timers. Therefore it should not be + * disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "syspll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + /* + * This may feed critical parts of the systems like timers. + * Therefore it should not be disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + .eid = PMC_SYSPLL, + }, + }, + + [PLL_ID_DDR] = { + [PLL_COMPID_FRAC] = { + .n = "ddrpll_fracck", + .p = SAMA7D65_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + /* + * This feeds ddrpll_divpmcck which feeds DDR. It should not + * be disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "ddrpll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + /* This feeds DDR. It should not be disabled. */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + }, + }, + + [PLL_ID_GPU] = { + [PLL_COMPID_FRAC] = { + .n = "gpupll_fracck", + .p = SAMA7D65_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "gpupll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + }, + }, + + [PLL_ID_BAUD] = { + [PLL_COMPID_FRAC] = { + .n = "baudpll_fracck", + .p = SAMA7D65_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "baudpll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_BAUDPLL, + }, + }, + + [PLL_ID_AUDIO] = { + [PLL_COMPID_FRAC] = { + .n = "audiopll_fracck", + .p = SAMA7D65_PLL_PARENT_MAIN_XTAL, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "audiopll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_AUDIOPMCPLL, + }, + + [PLL_COMPID_DIV1] = { + .n = "audiopll_diviock", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divio, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_AUDIOIOPLL, + }, + }, + + [PLL_ID_ETH] = { + [PLL_COMPID_FRAC] = { + .n = "ethpll_fracck", + .p = SAMA7D65_PLL_PARENT_MAIN_XTAL, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "ethpll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_ETHPLL, + }, + }, + + [PLL_ID_LVDS] = { + [PLL_COMPID_FRAC] = { + .n = "lvdspll_fracck", + .p = SAMA7D65_PLL_PARENT_MAIN_XTAL, + .l = &pll_layout_frac, + .c = &lvdspll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "lvdspll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &lvdspll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_LVDSPLL, + }, + }, + + [PLL_ID_USB] = { + [PLL_COMPID_FRAC] = { + .n = "usbpll_fracck", + .p = SAMA7D65_PLL_PARENT_MAIN_XTAL, + .l = &pll_layout_frac, + .c = &upll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "usbpll_divpmcck", + .p = SAMA7D65_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &upll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_UTMI, + }, + }, +}; + +/* Used to create an array entry identifying a PLL by its components. */ +#define PLL_IDS_TO_ARR_ENTRY(_id, _comp) { PLL_ID_##_id, PLL_COMPID_##_comp} + +/* + * Master clock (MCK[0..9]) description + * @n: clock name + * @ep_chg_chg_id: index in parents array that specifies the changeable + * @ep: extra parents names array (entry formed by PLL components + * identifiers (see enum pll_component_id)) + * @hw: pointer to clk_hw + * parent + * @ep_count: extra parents count + * @ep_mux_table: mux table for extra parents + * @id: clock id + * @eid: export index in sama7d65->chws[] array + * @c: true if clock is critical and cannot be disabled + */ +static struct { + const char *n; + struct { + int pll_id; + int pll_compid; + } ep[4]; + struct clk_hw *hw; + int ep_chg_id; + u8 ep_count; + u8 ep_mux_table[4]; + u8 id; + u8 eid; + u8 c; +} sama7d65_mckx[] = { + { .n = "mck0", }, /* Dummy entry for MCK0 to store hw in probe. */ + { .n = "mck1", + .id = 1, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_count = 1, + .ep_chg_id = INT_MIN, + .eid = PMC_MCK1, + .c = 1, }, + + { .n = "mck2", + .id = 2, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(DDR, DIV0), }, + .ep_mux_table = { 5, 6, }, + .ep_count = 2, + .ep_chg_id = INT_MIN, + .c = 1, }, + + { .n = "mck3", + .id = 3, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(DDR, DIV0), }, + .ep_mux_table = { 5, 6, }, + .ep_count = 2, + .ep_chg_id = INT_MIN, + .eid = PMC_MCK3, + .c = 1, }, + + { .n = "mck4", + .id = 4, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_count = 1, + .ep_chg_id = INT_MIN, + .c = 1, }, + + { .n = "mck5", + .id = 5, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_count = 1, + .ep_chg_id = INT_MIN, + .eid = PMC_MCK5, + .c = 1, }, + + { .n = "mck6", + .id = 6, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_chg_id = INT_MIN, + .ep_count = 1, + .c = 1, }, + + { .n = "mck7", + .id = 7, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_chg_id = INT_MIN, + .ep_count = 1, }, + + { .n = "mck8", + .id = 8, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_chg_id = INT_MIN, + .ep_count = 1, }, + + { .n = "mck9", + .id = 9, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_chg_id = INT_MIN, + .ep_count = 1, }, +}; + +/* + * System clock description + * @n: clock name + * @p: clock parent name + * @id: clock id + */ +static const struct { + const char *n; + const char *p; + u8 id; +} sama7d65_systemck[] = { + { .n = "uhpck", .p = "usbck", .id = 6 }, + { .n = "pck0", .p = "prog0", .id = 8, }, + { .n = "pck1", .p = "prog1", .id = 9, }, + { .n = "pck2", .p = "prog2", .id = 10, }, + { .n = "pck3", .p = "prog3", .id = 11, }, + { .n = "pck4", .p = "prog4", .id = 12, }, + { .n = "pck5", .p = "prog5", .id = 13, }, + { .n = "pck6", .p = "prog6", .id = 14, }, + { .n = "pck7", .p = "prog7", .id = 15, }, +}; + +/* Mux table for programmable clocks. */ +static u32 sama7d65_prog_mux_table[] = { 0, 1, 2, 5, 7, 8, 9, 10, 12 }; + +/* + * Peripheral clock parent hw identifier (used to index in sama7d65_mckx[]) + * @PCK_PARENT_HW_MCK0: pck parent hw identifier is MCK0 + * @PCK_PARENT_HW_MCK1: pck parent hw identifier is MCK1 + * @PCK_PARENT_HW_MCK2: pck parent hw identifier is MCK2 + * @PCK_PARENT_HW_MCK3: pck parent hw identifier is MCK3 + * @PCK_PARENT_HW_MCK4: pck parent hw identifier is MCK4 + * @PCK_PARENT_HW_MCK5: pck parent hw identifier is MCK5 + * @PCK_PARENT_HW_MCK6: pck parent hw identifier is MCK6 + * @PCK_PARENT_HW_MCK7: pck parent hw identifier is MCK7 + * @PCK_PARENT_HW_MCK8: pck parent hw identifier is MCK8 + * @PCK_PARENT_HW_MCK9: pck parent hw identifier is MCK9 + * @PCK_PARENT_HW_MAX: max identifier + */ +enum sama7d65_pck_parent_hw_id { + PCK_PARENT_HW_MCK0, + PCK_PARENT_HW_MCK1, + PCK_PARENT_HW_MCK2, + PCK_PARENT_HW_MCK3, + PCK_PARENT_HW_MCK4, + PCK_PARENT_HW_MCK5, + PCK_PARENT_HW_MCK6, + PCK_PARENT_HW_MCK7, + PCK_PARENT_HW_MCK8, + PCK_PARENT_HW_MCK9, + PCK_PARENT_HW_MAX +}; + +/* + * Peripheral clock description + * @n: clock name + * @p: clock parent hw id + * @r: clock range values + * @id: clock id + * @chgp: index in parent array of the changeable parent + */ +static struct { + const char *n; + enum sama7d65_pck_parent_hw_id p; + struct clk_range r; + u8 chgp; + u8 id; +} sama7d65_periphck[] = { + { .n = "pioA_clk", .p = PCK_PARENT_HW_MCK0, .id = 10, }, + { .n = "securam_clk", .p = PCK_PARENT_HW_MCK0, .id = 17, }, + { .n = "sfr_clk", .p = PCK_PARENT_HW_MCK7, .id = 18, }, + { .n = "hsmc_clk", .p = PCK_PARENT_HW_MCK5, .id = 20, }, + { .n = "xdmac0_clk", .p = PCK_PARENT_HW_MCK6, .id = 21, }, + { .n = "xdmac1_clk", .p = PCK_PARENT_HW_MCK6, .id = 22, }, + { .n = "xdmac2_clk", .p = PCK_PARENT_HW_MCK1, .id = 23, }, + { .n = "acc_clk", .p = PCK_PARENT_HW_MCK7, .id = 24, }, + { .n = "aes_clk", .p = PCK_PARENT_HW_MCK6, .id = 26, }, + { .n = "tzaesbasc_clk", .p = PCK_PARENT_HW_MCK8, .id = 27, }, + { .n = "asrc_clk", .p = PCK_PARENT_HW_MCK9, .id = 29, .r = { .max = 200000000, }, }, + { .n = "cpkcc_clk", .p = PCK_PARENT_HW_MCK0, .id = 30, }, + { .n = "eic_clk", .p = PCK_PARENT_HW_MCK7, .id = 33, }, + { .n = "flex0_clk", .p = PCK_PARENT_HW_MCK7, .id = 34, }, + { .n = "flex1_clk", .p = PCK_PARENT_HW_MCK7, .id = 35, }, + { .n = "flex2_clk", .p = PCK_PARENT_HW_MCK7, .id = 36, }, + { .n = "flex3_clk", .p = PCK_PARENT_HW_MCK7, .id = 37, }, + { .n = "flex4_clk", .p = PCK_PARENT_HW_MCK8, .id = 38, }, + { .n = "flex5_clk", .p = PCK_PARENT_HW_MCK8, .id = 39, }, + { .n = "flex6_clk", .p = PCK_PARENT_HW_MCK8, .id = 40, }, + { .n = "flex7_clk", .p = PCK_PARENT_HW_MCK8, .id = 41, }, + { .n = "flex8_clk", .p = PCK_PARENT_HW_MCK9, .id = 42, }, + { .n = "flex9_clk", .p = PCK_PARENT_HW_MCK9, .id = 43, }, + { .n = "flex10_clk", .p = PCK_PARENT_HW_MCK9, .id = 44, }, + { .n = "gmac0_clk", .p = PCK_PARENT_HW_MCK6, .id = 46, }, + { .n = "gmac1_clk", .p = PCK_PARENT_HW_MCK6, .id = 47, }, + { .n = "gmac0_tsu_clk", .p = PCK_PARENT_HW_MCK1, .id = 49, }, + { .n = "gmac1_tsu_clk", .p = PCK_PARENT_HW_MCK1, .id = 50, }, + { .n = "icm_clk", .p = PCK_PARENT_HW_MCK5, .id = 53, }, + { .n = "i2smcc0_clk", .p = PCK_PARENT_HW_MCK9, .id = 54, .r = { .max = 200000000, }, }, + { .n = "i2smcc1_clk", .p = PCK_PARENT_HW_MCK9, .id = 55, .r = { .max = 200000000, }, }, + { .n = "lcd_clk", .p = PCK_PARENT_HW_MCK3, .id = 56, }, + { .n = "matrix_clk", .p = PCK_PARENT_HW_MCK5, .id = 57, }, + { .n = "mcan0_clk", .p = PCK_PARENT_HW_MCK5, .id = 58, .r = { .max = 200000000, }, }, + { .n = "mcan1_clk", .p = PCK_PARENT_HW_MCK5, .id = 59, .r = { .max = 200000000, }, }, + { .n = "mcan2_clk", .p = PCK_PARENT_HW_MCK5, .id = 60, .r = { .max = 200000000, }, }, + { .n = "mcan3_clk", .p = PCK_PARENT_HW_MCK5, .id = 61, .r = { .max = 200000000, }, }, + { .n = "mcan4_clk", .p = PCK_PARENT_HW_MCK5, .id = 62, .r = { .max = 200000000, }, }, + { .n = "pdmc0_clk", .p = PCK_PARENT_HW_MCK9, .id = 64, .r = { .max = 200000000, }, }, + { .n = "pdmc1_clk", .p = PCK_PARENT_HW_MCK9, .id = 65, .r = { .max = 200000000, }, }, + { .n = "pit64b0_clk", .p = PCK_PARENT_HW_MCK7, .id = 66, }, + { .n = "pit64b1_clk", .p = PCK_PARENT_HW_MCK7, .id = 67, }, + { .n = "pit64b2_clk", .p = PCK_PARENT_HW_MCK7, .id = 68, }, + { .n = "pit64b3_clk", .p = PCK_PARENT_HW_MCK8, .id = 69, }, + { .n = "pit64b4_clk", .p = PCK_PARENT_HW_MCK8, .id = 70, }, + { .n = "pit64b5_clk", .p = PCK_PARENT_HW_MCK8, .id = 71, }, + { .n = "pwm_clk", .p = PCK_PARENT_HW_MCK7, .id = 72, }, + { .n = "qspi0_clk", .p = PCK_PARENT_HW_MCK5, .id = 73, }, + { .n = "qspi1_clk", .p = PCK_PARENT_HW_MCK5, .id = 74, }, + { .n = "sdmmc0_clk", .p = PCK_PARENT_HW_MCK1, .id = 75, }, + { .n = "sdmmc1_clk", .p = PCK_PARENT_HW_MCK1, .id = 76, }, + { .n = "sdmmc2_clk", .p = PCK_PARENT_HW_MCK1, .id = 77, }, + { .n = "sha_clk", .p = PCK_PARENT_HW_MCK6, .id = 78, }, + { .n = "spdifrx_clk", .p = PCK_PARENT_HW_MCK9, .id = 79, .r = { .max = 200000000, }, }, + { .n = "spdiftx_clk", .p = PCK_PARENT_HW_MCK9, .id = 80, .r = { .max = 200000000, }, }, + { .n = "ssc0_clk", .p = PCK_PARENT_HW_MCK7, .id = 81, .r = { .max = 200000000, }, }, + { .n = "ssc1_clk", .p = PCK_PARENT_HW_MCK8, .id = 82, .r = { .max = 200000000, }, }, + { .n = "tcb0_ch0_clk", .p = PCK_PARENT_HW_MCK8, .id = 83, .r = { .max = 200000000, }, }, + { .n = "tcb0_ch1_clk", .p = PCK_PARENT_HW_MCK8, .id = 84, .r = { .max = 200000000, }, }, + { .n = "tcb0_ch2_clk", .p = PCK_PARENT_HW_MCK8, .id = 85, .r = { .max = 200000000, }, }, + { .n = "tcb1_ch0_clk", .p = PCK_PARENT_HW_MCK5, .id = 86, .r = { .max = 200000000, }, }, + { .n = "tcb1_ch1_clk", .p = PCK_PARENT_HW_MCK5, .id = 87, .r = { .max = 200000000, }, }, + { .n = "tcb1_ch2_clk", .p = PCK_PARENT_HW_MCK5, .id = 88, .r = { .max = 200000000, }, }, + { .n = "tcpca_clk", .p = PCK_PARENT_HW_MCK5, .id = 89, }, + { .n = "tcpcb_clk", .p = PCK_PARENT_HW_MCK5, .id = 90, }, + { .n = "tdes_clk", .p = PCK_PARENT_HW_MCK6, .id = 91, }, + { .n = "trng_clk", .p = PCK_PARENT_HW_MCK6, .id = 92, }, + { .n = "udphsa_clk", .p = PCK_PARENT_HW_MCK5, .id = 99, }, + { .n = "udphsb_clk", .p = PCK_PARENT_HW_MCK5, .id = 100, }, + { .n = "uhphs_clk", .p = PCK_PARENT_HW_MCK5, .id = 101, }, + { .n = "dsi_clk", .p = PCK_PARENT_HW_MCK3, .id = 103, }, + { .n = "lvdsc_clk", .p = PCK_PARENT_HW_MCK3, .id = 104, }, + { .n = "i3cc_clk", .p = PCK_PARENT_HW_MCK8, .id = 105, }, +}; + +/* + * Generic clock description + * @n: clock name + * @pp: PLL parents (entry formed by PLL components identifiers + * (see enum pll_component_id)) + * @pp_mux_table: PLL parents mux table + * @r: clock output range + * @pp_chg_id: id in parent array of changeable PLL parent + * @pp_count: PLL parents count + * @id: clock id + */ +static const struct { + const char *n; + struct { + int pll_id; + int pll_compid; + } pp[8]; + const char pp_mux_table[8]; + struct clk_range r; + int pp_chg_id; + u8 pp_count; + u8 id; +} sama7d65_gck[] = { + { .n = "adc_gclk", + .id = 25, + .r = { .max = 100000000, }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 8, 9, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "asrc_gclk", + .id = 29, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex0_gclk", + .id = 34, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = {8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex1_gclk", + .id = 35, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = {8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex2_gclk", + .id = 36, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = {8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex3_gclk", + .id = 37, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = {8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex4_gclk", + .id = 38, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex5_gclk", + .id = 39, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex6_gclk", + .id = 40, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex7_gclk", + .id = 41, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex8_gclk", + .id = 42, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex9_gclk", + .id = 43, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "flex10_gclk", + .id = 44, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 8, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "gmac0_gclk", + .id = 46, + .r = { .max = 125000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 10, }, + .pp_count = 1, + .pp_chg_id = 4, }, + + { .n = "gmac1_gclk", + .id = 47, + .r = { .max = 125000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 10, }, + .pp_count = 1, + .pp_chg_id = 4, }, + + { .n = "gmac0_tsu_gclk", + .id = 49, + .r = { .max = 400000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = {10, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "gmac1_tsu_gclk", + .id = 50, + .r = { .max = 400000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 10, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "i2smcc0_gclk", + .id = 54, + .r = { .max = 100000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "i2smcc1_gclk", + .id = 55, + .r = { .max = 100000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "lcdc_gclk", + .id = 56, + .r = { .max = 90000000 }, + .pp_count = 0, + .pp_chg_id = INT_MIN, + }, + + { .n = "mcan0_gclk", + .id = 58, + .r = { .max = 80000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(USB, DIV0), }, + .pp_mux_table = { 12 }, + .pp_count = 1, + .pp_chg_id = 4, }, + + { .n = "mcan1_gclk", + .id = 59, + .r = { .max = 80000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(USB, DIV0), }, + .pp_mux_table = { 12 }, + .pp_count = 1, + .pp_chg_id = 4, }, + + { .n = "mcan2_gclk", + .id = 60, + .r = { .max = 80000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(USB, DIV0), }, + .pp_mux_table = { 12 }, + .pp_count = 1, + .pp_chg_id = 4, }, + + { .n = "mcan3_gclk", + .id = 61, + .r = { .max = 80000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(USB, DIV0), }, + .pp_mux_table = { 12 }, + .pp_count = 1, + .pp_chg_id = 4, }, + + { .n = "mcan4_gclk", + .id = 62, + .r = { .max = 80000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(USB, DIV0), }, + .pp_mux_table = { 12 }, + .pp_count = 1, + .pp_chg_id = 4, }, + + { .n = "pdmc0_gclk", + .id = 64, + .r = { .max = 80000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9 }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "pdmc1_gclk", + .id = 65, + .r = { .max = 80000000, }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b0_gclk", + .id = 66, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b1_gclk", + .id = 67, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b2_gclk", + .id = 68, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b3_gclk", + .id = 69, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = {8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b4_gclk", + .id = 70, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = {8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b5_gclk", + .id = 71, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = {8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "qspi0_gclk", + .id = 73, + .r = { .max = 400000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "qspi1_gclk", + .id = 74, + .r = { .max = 266000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "sdmmc0_gclk", + .id = 75, + .r = { .max = 208000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 10, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "sdmmc1_gclk", + .id = 76, + .r = { .max = 208000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 10, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "sdmmc2_gclk", + .id = 77, + .r = { .max = 208000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 10 }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "spdifrx_gclk", + .id = 79, + .r = { .max = 150000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "spdiftx_gclk", + .id = 80, + .r = { .max = 25000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "tcb0_ch0_gclk", + .id = 83, + .r = { .max = 34000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "tcb1_ch0_gclk", + .id = 86, + .r = { .max = 67000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "DSI_gclk", + .id = 103, + .r = {.max = 27000000}, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .pp_mux_table = {5}, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "I3CC_gclk", + .id = 105, + .r = {.max = 125000000}, + .pp = { PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = {8, 9, 10, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, +}; + +/* MCK0 characteristics. */ +static const struct clk_master_characteristics mck0_characteristics = { + .output = { .min = 32768, .max = 200000000 }, + .divisors = { 1, 2, 4, 3, 5 }, + .have_div3_pres = 1, +}; + +/* MCK0 layout. */ +static const struct clk_master_layout mck0_layout = { + .mask = 0x773, + .pres_shift = 4, + .offset = 0x28, +}; + +/* Programmable clock layout. */ +static const struct clk_programmable_layout programmable_layout = { + .pres_mask = 0xff, + .pres_shift = 8, + .css_mask = 0x1f, + .have_slck_mck = 0, + .is_pres_direct = 1, +}; + +/* Peripheral clock layout. */ +static const struct clk_pcr_layout sama7d65_pcr_layout = { + .offset = 0x88, + .cmd = BIT(31), + .gckcss_mask = GENMASK(12, 8), + .pid_mask = GENMASK(6, 0), +}; + +static void __init sama7d65_pmc_setup(struct device_node *np) +{ + const char *main_xtal_name = "main_xtal"; + struct pmc_data *sama7d65_pmc; + const char *parent_names[11]; + void **alloc_mem = NULL; + int alloc_mem_size = 0; + struct regmap *regmap; + struct clk_hw *hw, *main_rc_hw, *main_osc_hw, *main_xtal_hw; + struct clk_hw *td_slck_hw, *md_slck_hw; + static struct clk_parent_data parent_data; + struct clk_hw *parent_hws[10]; + bool bypass; + int i, j; + + td_slck_hw = __clk_get_hw(of_clk_get_by_name(np, "td_slck")); + md_slck_hw = __clk_get_hw(of_clk_get_by_name(np, "md_slck")); + main_xtal_hw = __clk_get_hw(of_clk_get_by_name(np, main_xtal_name)); + + if (!td_slck_hw || !md_slck_hw || !main_xtal_hw) + return; + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + sama7d65_pmc = pmc_data_allocate(PMC_INDEX_MAX, + nck(sama7d65_systemck), + nck(sama7d65_periphck), + nck(sama7d65_gck), 8); + if (!sama7d65_pmc) + return; + + alloc_mem = kmalloc(sizeof(void *) * + (ARRAY_SIZE(sama7d65_mckx) + ARRAY_SIZE(sama7d65_gck)), + GFP_KERNEL); + if (!alloc_mem) + goto err_free; + + main_rc_hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 50000000); + if (IS_ERR(main_rc_hw)) + goto err_free; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + parent_data.name = main_xtal_name; + parent_data.fw_name = main_xtal_name; + main_osc_hw = at91_clk_register_main_osc(regmap, "main_osc", NULL, + &parent_data, bypass); + if (IS_ERR(main_osc_hw)) + goto err_free; + + parent_hws[0] = main_rc_hw; + parent_hws[1] = main_osc_hw; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", NULL, parent_hws, 2); + if (IS_ERR(hw)) + goto err_free; + + sama7d65_pmc->chws[PMC_MAIN] = hw; + + for (i = 0; i < PLL_ID_MAX; i++) { + for (j = 0; j < PLL_COMPID_MAX; j++) { + struct clk_hw *parent_hw; + + if (!sama7d65_plls[i][j].n) + continue; + + switch (sama7d65_plls[i][j].t) { + case PLL_TYPE_FRAC: + switch (sama7d65_plls[i][j].p) { + case SAMA7D65_PLL_PARENT_MAINCK: + parent_hw = sama7d65_pmc->chws[PMC_MAIN]; + break; + case SAMA7D65_PLL_PARENT_MAIN_XTAL: + parent_hw = main_xtal_hw; + break; + default: + /* Should not happen. */ + parent_hw = NULL; + break; + } + + hw = sam9x60_clk_register_frac_pll(regmap, + &pmc_pll_lock, sama7d65_plls[i][j].n, + NULL, parent_hw, i, + sama7d65_plls[i][j].c, + sama7d65_plls[i][j].l, + sama7d65_plls[i][j].f); + break; + + case PLL_TYPE_DIV: + hw = sam9x60_clk_register_div_pll(regmap, + &pmc_pll_lock, sama7d65_plls[i][j].n, + NULL, sama7d65_plls[i][0].hw, i, + sama7d65_plls[i][j].c, + sama7d65_plls[i][j].l, + sama7d65_plls[i][j].f, + sama7d65_plls[i][j].safe_div); + break; + + default: + continue; + } + + if (IS_ERR(hw)) + goto err_free; + + sama7d65_plls[i][j].hw = hw; + if (sama7d65_plls[i][j].eid) + sama7d65_pmc->chws[sama7d65_plls[i][j].eid] = hw; + } + } + + hw = at91_clk_register_master_div(regmap, "mck0", NULL, + sama7d65_plls[PLL_ID_CPU][1].hw, + &mck0_layout, &mck0_characteristics, + &pmc_mck0_lock, CLK_GET_RATE_NOCACHE, 5); + if (IS_ERR(hw)) + goto err_free; + + sama7d65_pmc->chws[PMC_MCK] = hw; + sama7d65_mckx[PCK_PARENT_HW_MCK0].hw = hw; + + parent_hws[0] = md_slck_hw; + parent_hws[1] = td_slck_hw; + parent_hws[2] = sama7d65_pmc->chws[PMC_MAIN]; + for (i = PCK_PARENT_HW_MCK1; i < ARRAY_SIZE(sama7d65_mckx); i++) { + u8 num_parents = 3 + sama7d65_mckx[i].ep_count; + struct clk_hw *tmp_parent_hws[8]; + u32 *mux_table; + + mux_table = kmalloc_array(num_parents, sizeof(*mux_table), + GFP_KERNEL); + if (!mux_table) + goto err_free; + + alloc_mem[alloc_mem_size++] = mux_table; + + PMC_INIT_TABLE(mux_table, 3); + PMC_FILL_TABLE(&mux_table[3], sama7d65_mckx[i].ep_mux_table, + sama7d65_mckx[i].ep_count); + for (j = 0; j < sama7d65_mckx[i].ep_count; j++) { + u8 pll_id = sama7d65_mckx[i].ep[j].pll_id; + u8 pll_compid = sama7d65_mckx[i].ep[j].pll_compid; + + tmp_parent_hws[j] = sama7d65_plls[pll_id][pll_compid].hw; + } + PMC_FILL_TABLE(&parent_hws[3], tmp_parent_hws, + sama7d65_mckx[i].ep_count); + + hw = at91_clk_sama7g5_register_master(regmap, sama7d65_mckx[i].n, + num_parents, NULL, parent_hws, + mux_table, &pmc_mckX_lock, + sama7d65_mckx[i].id, + sama7d65_mckx[i].c, + sama7d65_mckx[i].ep_chg_id); + + if (IS_ERR(hw)) + goto err_free; + + sama7d65_mckx[i].hw = hw; + if (sama7d65_mckx[i].eid) + sama7d65_pmc->chws[sama7d65_mckx[i].eid] = hw; + } + + parent_names[0] = "syspll_divpmcck"; + parent_names[1] = "usbpll_divpmcck"; + parent_names[2] = "main_osc"; + hw = sam9x60_clk_register_usb(regmap, "usbck", parent_names, 3); + if (IS_ERR(hw)) + goto err_free; + + parent_hws[0] = md_slck_hw; + parent_hws[1] = td_slck_hw; + parent_hws[2] = sama7d65_pmc->chws[PMC_MAIN]; + parent_hws[3] = sama7d65_plls[PLL_ID_SYS][PLL_COMPID_DIV0].hw; + parent_hws[4] = sama7d65_plls[PLL_ID_DDR][PLL_COMPID_DIV0].hw; + parent_hws[5] = sama7d65_plls[PLL_ID_GPU][PLL_COMPID_DIV0].hw; + parent_hws[6] = sama7d65_plls[PLL_ID_BAUD][PLL_COMPID_DIV0].hw; + parent_hws[7] = sama7d65_plls[PLL_ID_AUDIO][PLL_COMPID_DIV0].hw; + parent_hws[8] = sama7d65_plls[PLL_ID_ETH][PLL_COMPID_DIV0].hw; + + for (i = 0; i < 8; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, NULL, parent_hws, + 9, i, + &programmable_layout, + sama7d65_prog_mux_table); + if (IS_ERR(hw)) + goto err_free; + + sama7d65_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama7d65_systemck); i++) { + hw = at91_clk_register_system(regmap, sama7d65_systemck[i].n, + sama7d65_systemck[i].p, NULL, + sama7d65_systemck[i].id, 0); + if (IS_ERR(hw)) + goto err_free; + + sama7d65_pmc->shws[sama7d65_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama7d65_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sama7d65_pcr_layout, + sama7d65_periphck[i].n, + NULL, + sama7d65_mckx[sama7d65_periphck[i].p].hw, + sama7d65_periphck[i].id, + &sama7d65_periphck[i].r, + sama7d65_periphck[i].chgp ? 0 : + INT_MIN, 0); + if (IS_ERR(hw)) + goto err_free; + + sama7d65_pmc->phws[sama7d65_periphck[i].id] = hw; + } + + parent_hws[0] = md_slck_hw; + parent_hws[1] = td_slck_hw; + parent_hws[2] = sama7d65_pmc->chws[PMC_MAIN]; + parent_hws[3] = sama7d65_pmc->chws[PMC_MCK1]; + for (i = 0; i < ARRAY_SIZE(sama7d65_gck); i++) { + u8 num_parents = 4 + sama7d65_gck[i].pp_count; + struct clk_hw *tmp_parent_hws[8]; + u32 *mux_table; + + mux_table = kmalloc_array(num_parents, sizeof(*mux_table), + GFP_KERNEL); + if (!mux_table) + goto err_free; + + alloc_mem[alloc_mem_size++] = mux_table; + + PMC_INIT_TABLE(mux_table, 4); + PMC_FILL_TABLE(&mux_table[4], sama7d65_gck[i].pp_mux_table, + sama7d65_gck[i].pp_count); + for (j = 0; j < sama7d65_gck[i].pp_count; j++) { + u8 pll_id = sama7d65_gck[i].pp[j].pll_id; + u8 pll_compid = sama7d65_gck[i].pp[j].pll_compid; + + tmp_parent_hws[j] = sama7d65_plls[pll_id][pll_compid].hw; + } + PMC_FILL_TABLE(&parent_hws[4], tmp_parent_hws, + sama7d65_gck[i].pp_count); + + hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, + &sama7d65_pcr_layout, + sama7d65_gck[i].n, NULL, + parent_hws, mux_table, + num_parents, + sama7d65_gck[i].id, + &sama7d65_gck[i].r, + sama7d65_gck[i].pp_chg_id); + if (IS_ERR(hw)) + goto err_free; + + sama7d65_pmc->ghws[sama7d65_gck[i].id] = hw; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama7d65_pmc); + kfree(alloc_mem); + + return; + +err_free: + if (alloc_mem) { + for (i = 0; i < alloc_mem_size; i++) + kfree(alloc_mem[i]); + kfree(alloc_mem); + } + + kfree(sama7d65_pmc); +} + +/* Some clks are used for a clocksource */ +CLK_OF_DECLARE(sama7d65_pmc, "microchip,sama7d65-pmc", sama7d65_pmc_setup); diff --git a/drivers/clk/at91/sama7g5.c b/drivers/clk/at91/sama7g5.c new file mode 100644 index 000000000..1340c2b00 --- /dev/null +++ b/drivers/clk/at91/sama7g5.c @@ -0,0 +1,1248 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SAMA7G5 PMC code. + * + * Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries + * + * Author: Claudiu Beznea <claudiu.beznea@microchip.com> + * + */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/mfd/syscon.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/at91.h> + +#include "pmc.h" + +static DEFINE_SPINLOCK(pmc_pll_lock); +static DEFINE_SPINLOCK(pmc_mck0_lock); +static DEFINE_SPINLOCK(pmc_mckX_lock); + +/* + * PLL clocks identifiers + * @PLL_ID_CPU: CPU PLL identifier + * @PLL_ID_SYS: System PLL identifier + * @PLL_ID_DDR: DDR PLL identifier + * @PLL_ID_IMG: Image subsystem PLL identifier + * @PLL_ID_BAUD: Baud PLL identifier + * @PLL_ID_AUDIO: Audio PLL identifier + * @PLL_ID_ETH: Ethernet PLL identifier + */ +enum pll_ids { + PLL_ID_CPU, + PLL_ID_SYS, + PLL_ID_DDR, + PLL_ID_IMG, + PLL_ID_BAUD, + PLL_ID_AUDIO, + PLL_ID_ETH, + PLL_ID_MAX, +}; + +/* + * PLL component identifier + * @PLL_COMPID_FRAC: Fractional PLL component identifier + * @PLL_COMPID_DIV0: 1st PLL divider component identifier + * @PLL_COMPID_DIV1: 2nd PLL divider component identifier + */ +enum pll_component_id { + PLL_COMPID_FRAC, + PLL_COMPID_DIV0, + PLL_COMPID_DIV1, + PLL_COMPID_MAX, +}; + +/* + * PLL type identifiers + * @PLL_TYPE_FRAC: fractional PLL identifier + * @PLL_TYPE_DIV: divider PLL identifier + */ +enum pll_type { + PLL_TYPE_FRAC, + PLL_TYPE_DIV, +}; + +/* Layout for fractional PLLs. */ +static const struct clk_pll_layout pll_layout_frac = { + .mul_mask = GENMASK(31, 24), + .frac_mask = GENMASK(21, 0), + .mul_shift = 24, + .frac_shift = 0, +}; + +/* Layout for DIVPMC dividers. */ +static const struct clk_pll_layout pll_layout_divpmc = { + .div_mask = GENMASK(7, 0), + .endiv_mask = BIT(29), + .div_shift = 0, + .endiv_shift = 29, +}; + +/* Layout for DIVIO dividers. */ +static const struct clk_pll_layout pll_layout_divio = { + .div_mask = GENMASK(19, 12), + .endiv_mask = BIT(30), + .div_shift = 12, + .endiv_shift = 30, +}; + +/* + * CPU PLL output range. + * Notice: The upper limit has been setup to 1000000002 due to hardware + * block which cannot output exactly 1GHz. + */ +static const struct clk_range cpu_pll_outputs[] = { + { .min = 2343750, .max = 1000000002 }, +}; + +/* PLL output range. */ +static const struct clk_range pll_outputs[] = { + { .min = 2343750, .max = 1200000000 }, +}; + +/* Fractional PLL core output range. */ +static const struct clk_range core_outputs[] = { + { .min = 600000000, .max = 1200000000 }, +}; + +/* CPU PLL characteristics. */ +static const struct clk_pll_characteristics cpu_pll_characteristics = { + .input = { .min = 12000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(cpu_pll_outputs), + .output = cpu_pll_outputs, + .core_output = core_outputs, + .acr = UL(0x00070010), +}; + +/* PLL characteristics. */ +static const struct clk_pll_characteristics pll_characteristics = { + .input = { .min = 12000000, .max = 50000000 }, + .num_output = ARRAY_SIZE(pll_outputs), + .output = pll_outputs, + .core_output = core_outputs, + .acr = UL(0x00070010), +}; + +/* + * SAMA7G5 PLL possible parents + * @SAMA7G5_PLL_PARENT_MAINCK: MAINCK is PLL a parent + * @SAMA7G5_PLL_PARENT_MAIN_XTAL: MAIN XTAL is a PLL parent + * @SAMA7G5_PLL_PARENT_FRACCK: Frac PLL is a PLL parent (for PLL dividers) + */ +enum sama7g5_pll_parent { + SAMA7G5_PLL_PARENT_MAINCK, + SAMA7G5_PLL_PARENT_MAIN_XTAL, + SAMA7G5_PLL_PARENT_FRACCK, +}; + +/* + * PLL clocks description + * @n: clock name + * @l: clock layout + * @c: clock characteristics + * @hw: pointer to clk_hw + * @t: clock type + * @f: clock flags + * @p: clock parent + * @eid: export index in sama7g5->chws[] array + * @safe_div: intermediate divider need to be set on PRE_RATE_CHANGE + * notification + */ +static struct sama7g5_pll { + const char *n; + const struct clk_pll_layout *l; + const struct clk_pll_characteristics *c; + struct clk_hw *hw; + unsigned long f; + enum sama7g5_pll_parent p; + u8 t; + u8 eid; + u8 safe_div; +} sama7g5_plls[][PLL_COMPID_MAX] = { + [PLL_ID_CPU] = { + [PLL_COMPID_FRAC] = { + .n = "cpupll_fracck", + .p = SAMA7G5_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &cpu_pll_characteristics, + .t = PLL_TYPE_FRAC, + /* + * This feeds cpupll_divpmcck which feeds CPU. It should + * not be disabled. + */ + .f = CLK_IS_CRITICAL, + }, + + [PLL_COMPID_DIV0] = { + .n = "cpupll_divpmcck", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &cpu_pll_characteristics, + .t = PLL_TYPE_DIV, + /* This feeds CPU. It should not be disabled. */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_PARENT, + .eid = PMC_CPUPLL, + /* + * Safe div=15 should be safe even for switching b/w 1GHz and + * 90MHz (frac pll might go up to 1.2GHz). + */ + .safe_div = 15, + }, + }, + + [PLL_ID_SYS] = { + [PLL_COMPID_FRAC] = { + .n = "syspll_fracck", + .p = SAMA7G5_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + /* + * This feeds syspll_divpmcck which may feed critical parts + * of the systems like timers. Therefore it should not be + * disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "syspll_divpmcck", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + /* + * This may feed critical parts of the systems like timers. + * Therefore it should not be disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + .eid = PMC_SYSPLL, + }, + }, + + [PLL_ID_DDR] = { + [PLL_COMPID_FRAC] = { + .n = "ddrpll_fracck", + .p = SAMA7G5_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + /* + * This feeds ddrpll_divpmcck which feeds DDR. It should not + * be disabled. + */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "ddrpll_divpmcck", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + /* This feeds DDR. It should not be disabled. */ + .f = CLK_IS_CRITICAL | CLK_SET_RATE_GATE, + }, + }, + + [PLL_ID_IMG] = { + [PLL_COMPID_FRAC] = { + .n = "imgpll_fracck", + .p = SAMA7G5_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "imgpll_divpmcck", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + }, + }, + + [PLL_ID_BAUD] = { + [PLL_COMPID_FRAC] = { + .n = "baudpll_fracck", + .p = SAMA7G5_PLL_PARENT_MAINCK, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, }, + + [PLL_COMPID_DIV0] = { + .n = "baudpll_divpmcck", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + }, + }, + + [PLL_ID_AUDIO] = { + [PLL_COMPID_FRAC] = { + .n = "audiopll_fracck", + .p = SAMA7G5_PLL_PARENT_MAIN_XTAL, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "audiopll_divpmcck", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_AUDIOPMCPLL, + }, + + [PLL_COMPID_DIV1] = { + .n = "audiopll_diviock", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divio, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + .eid = PMC_AUDIOIOPLL, + }, + }, + + [PLL_ID_ETH] = { + [PLL_COMPID_FRAC] = { + .n = "ethpll_fracck", + .p = SAMA7G5_PLL_PARENT_MAIN_XTAL, + .l = &pll_layout_frac, + .c = &pll_characteristics, + .t = PLL_TYPE_FRAC, + .f = CLK_SET_RATE_GATE, + }, + + [PLL_COMPID_DIV0] = { + .n = "ethpll_divpmcck", + .p = SAMA7G5_PLL_PARENT_FRACCK, + .l = &pll_layout_divpmc, + .c = &pll_characteristics, + .t = PLL_TYPE_DIV, + .f = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE | + CLK_SET_RATE_PARENT, + }, + }, +}; + +/* Used to create an array entry identifying a PLL by its components. */ +#define PLL_IDS_TO_ARR_ENTRY(_id, _comp) { PLL_ID_##_id, PLL_COMPID_##_comp} + +/* + * Master clock (MCK[1..4]) description + * @n: clock name + * @ep: extra parents names array (entry formed by PLL components + * identifiers (see enum pll_component_id)) + * @hw: pointer to clk_hw + * @ep_chg_id: index in parents array that specifies the changeable + * parent + * @ep_count: extra parents count + * @ep_mux_table: mux table for extra parents + * @id: clock id + * @eid: export index in sama7g5->chws[] array + * @c: true if clock is critical and cannot be disabled + */ +static struct { + const char *n; + struct { + int pll_id; + int pll_compid; + } ep[4]; + struct clk_hw *hw; + int ep_chg_id; + u8 ep_count; + u8 ep_mux_table[4]; + u8 id; + u8 eid; + u8 c; +} sama7g5_mckx[] = { + { .n = "mck0", }, /* Dummy entry for MCK0 to store hw in probe. */ + { .n = "mck1", + .id = 1, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_count = 1, + .ep_chg_id = INT_MIN, + .eid = PMC_MCK1, + .c = 1, }, + + { .n = "mck2", + .id = 2, + .ep = { PLL_IDS_TO_ARR_ENTRY(DDR, DIV0), }, + .ep_mux_table = { 6, }, + .ep_count = 1, + .ep_chg_id = INT_MIN, + .c = 1, }, + + { .n = "mck3", + .id = 3, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(DDR, DIV0), + PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), }, + .ep_mux_table = { 5, 6, 7, }, + .ep_count = 3, + .ep_chg_id = 5, }, + + { .n = "mck4", + .id = 4, + .ep = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), }, + .ep_mux_table = { 5, }, + .ep_count = 1, + .ep_chg_id = INT_MIN, + .c = 1, }, +}; + +/* + * System clock description + * @n: clock name + * @id: clock id + */ +static const struct { + const char *n; + u8 id; +} sama7g5_systemck[] = { + { .n = "pck0", .id = 8, }, + { .n = "pck1", .id = 9, }, + { .n = "pck2", .id = 10, }, + { .n = "pck3", .id = 11, }, + { .n = "pck4", .id = 12, }, + { .n = "pck5", .id = 13, }, + { .n = "pck6", .id = 14, }, + { .n = "pck7", .id = 15, }, +}; + +/* Mux table for programmable clocks. */ +static u32 sama7g5_prog_mux_table[] = { 0, 1, 2, 5, 6, 7, 8, 9, 10, }; + +/* + * Peripheral clock parent hw identifier (used to index in sama7g5_mckx[]) + * @PCK_PARENT_HW_MCK0: pck parent hw identifier is MCK0 + * @PCK_PARENT_HW_MCK1: pck parent hw identifier is MCK1 + * @PCK_PARENT_HW_MCK2: pck parent hw identifier is MCK2 + * @PCK_PARENT_HW_MCK3: pck parent hw identifier is MCK3 + * @PCK_PARENT_HW_MCK4: pck parent hw identifier is MCK4 + * @PCK_PARENT_HW_MAX: max identifier + */ +enum sama7g5_pck_parent_hw_id { + PCK_PARENT_HW_MCK0, + PCK_PARENT_HW_MCK1, + PCK_PARENT_HW_MCK2, + PCK_PARENT_HW_MCK3, + PCK_PARENT_HW_MCK4, + PCK_PARENT_HW_MAX, +}; + +/* + * Peripheral clock description + * @n: clock name + * @p: clock parent hw id + * @r: clock range values + * @id: clock id + * @chgp: index in parent array of the changeable parent + */ +static struct { + const char *n; + enum sama7g5_pck_parent_hw_id p; + struct clk_range r; + u8 chgp; + u8 id; +} sama7g5_periphck[] = { + { .n = "pioA_clk", .p = PCK_PARENT_HW_MCK0, .id = 11, }, + { .n = "securam_clk", .p = PCK_PARENT_HW_MCK0, .id = 18, }, + { .n = "sfr_clk", .p = PCK_PARENT_HW_MCK1, .id = 19, }, + { .n = "hsmc_clk", .p = PCK_PARENT_HW_MCK1, .id = 21, }, + { .n = "xdmac0_clk", .p = PCK_PARENT_HW_MCK1, .id = 22, }, + { .n = "xdmac1_clk", .p = PCK_PARENT_HW_MCK1, .id = 23, }, + { .n = "xdmac2_clk", .p = PCK_PARENT_HW_MCK1, .id = 24, }, + { .n = "acc_clk", .p = PCK_PARENT_HW_MCK1, .id = 25, }, + { .n = "aes_clk", .p = PCK_PARENT_HW_MCK1, .id = 27, }, + { .n = "tzaesbasc_clk", .p = PCK_PARENT_HW_MCK1, .id = 28, }, + { .n = "asrc_clk", .p = PCK_PARENT_HW_MCK1, .id = 30, .r = { .max = 200000000, }, }, + { .n = "cpkcc_clk", .p = PCK_PARENT_HW_MCK0, .id = 32, }, + { .n = "csi_clk", .p = PCK_PARENT_HW_MCK3, .id = 33, .r = { .max = 266000000, }, .chgp = 1, }, + { .n = "csi2dc_clk", .p = PCK_PARENT_HW_MCK3, .id = 34, .r = { .max = 266000000, }, .chgp = 1, }, + { .n = "eic_clk", .p = PCK_PARENT_HW_MCK1, .id = 37, }, + { .n = "flex0_clk", .p = PCK_PARENT_HW_MCK1, .id = 38, }, + { .n = "flex1_clk", .p = PCK_PARENT_HW_MCK1, .id = 39, }, + { .n = "flex2_clk", .p = PCK_PARENT_HW_MCK1, .id = 40, }, + { .n = "flex3_clk", .p = PCK_PARENT_HW_MCK1, .id = 41, }, + { .n = "flex4_clk", .p = PCK_PARENT_HW_MCK1, .id = 42, }, + { .n = "flex5_clk", .p = PCK_PARENT_HW_MCK1, .id = 43, }, + { .n = "flex6_clk", .p = PCK_PARENT_HW_MCK1, .id = 44, }, + { .n = "flex7_clk", .p = PCK_PARENT_HW_MCK1, .id = 45, }, + { .n = "flex8_clk", .p = PCK_PARENT_HW_MCK1, .id = 46, }, + { .n = "flex9_clk", .p = PCK_PARENT_HW_MCK1, .id = 47, }, + { .n = "flex10_clk", .p = PCK_PARENT_HW_MCK1, .id = 48, }, + { .n = "flex11_clk", .p = PCK_PARENT_HW_MCK1, .id = 49, }, + { .n = "gmac0_clk", .p = PCK_PARENT_HW_MCK1, .id = 51, }, + { .n = "gmac1_clk", .p = PCK_PARENT_HW_MCK1, .id = 52, }, + { .n = "icm_clk", .p = PCK_PARENT_HW_MCK1, .id = 55, }, + { .n = "isc_clk", .p = PCK_PARENT_HW_MCK3, .id = 56, .r = { .max = 266000000, }, .chgp = 1, }, + { .n = "i2smcc0_clk", .p = PCK_PARENT_HW_MCK1, .id = 57, .r = { .max = 200000000, }, }, + { .n = "i2smcc1_clk", .p = PCK_PARENT_HW_MCK1, .id = 58, .r = { .max = 200000000, }, }, + { .n = "matrix_clk", .p = PCK_PARENT_HW_MCK1, .id = 60, }, + { .n = "mcan0_clk", .p = PCK_PARENT_HW_MCK1, .id = 61, .r = { .max = 200000000, }, }, + { .n = "mcan1_clk", .p = PCK_PARENT_HW_MCK1, .id = 62, .r = { .max = 200000000, }, }, + { .n = "mcan2_clk", .p = PCK_PARENT_HW_MCK1, .id = 63, .r = { .max = 200000000, }, }, + { .n = "mcan3_clk", .p = PCK_PARENT_HW_MCK1, .id = 64, .r = { .max = 200000000, }, }, + { .n = "mcan4_clk", .p = PCK_PARENT_HW_MCK1, .id = 65, .r = { .max = 200000000, }, }, + { .n = "mcan5_clk", .p = PCK_PARENT_HW_MCK1, .id = 66, .r = { .max = 200000000, }, }, + { .n = "pdmc0_clk", .p = PCK_PARENT_HW_MCK1, .id = 68, .r = { .max = 200000000, }, }, + { .n = "pdmc1_clk", .p = PCK_PARENT_HW_MCK1, .id = 69, .r = { .max = 200000000, }, }, + { .n = "pit64b0_clk", .p = PCK_PARENT_HW_MCK1, .id = 70, }, + { .n = "pit64b1_clk", .p = PCK_PARENT_HW_MCK1, .id = 71, }, + { .n = "pit64b2_clk", .p = PCK_PARENT_HW_MCK1, .id = 72, }, + { .n = "pit64b3_clk", .p = PCK_PARENT_HW_MCK1, .id = 73, }, + { .n = "pit64b4_clk", .p = PCK_PARENT_HW_MCK1, .id = 74, }, + { .n = "pit64b5_clk", .p = PCK_PARENT_HW_MCK1, .id = 75, }, + { .n = "pwm_clk", .p = PCK_PARENT_HW_MCK1, .id = 77, }, + { .n = "qspi0_clk", .p = PCK_PARENT_HW_MCK1, .id = 78, }, + { .n = "qspi1_clk", .p = PCK_PARENT_HW_MCK1, .id = 79, }, + { .n = "sdmmc0_clk", .p = PCK_PARENT_HW_MCK1, .id = 80, }, + { .n = "sdmmc1_clk", .p = PCK_PARENT_HW_MCK1, .id = 81, }, + { .n = "sdmmc2_clk", .p = PCK_PARENT_HW_MCK1, .id = 82, }, + { .n = "sha_clk", .p = PCK_PARENT_HW_MCK1, .id = 83, }, + { .n = "spdifrx_clk", .p = PCK_PARENT_HW_MCK1, .id = 84, .r = { .max = 200000000, }, }, + { .n = "spdiftx_clk", .p = PCK_PARENT_HW_MCK1, .id = 85, .r = { .max = 200000000, }, }, + { .n = "ssc0_clk", .p = PCK_PARENT_HW_MCK1, .id = 86, .r = { .max = 200000000, }, }, + { .n = "ssc1_clk", .p = PCK_PARENT_HW_MCK1, .id = 87, .r = { .max = 200000000, }, }, + { .n = "tcb0_ch0_clk", .p = PCK_PARENT_HW_MCK1, .id = 88, .r = { .max = 200000000, }, }, + { .n = "tcb0_ch1_clk", .p = PCK_PARENT_HW_MCK1, .id = 89, .r = { .max = 200000000, }, }, + { .n = "tcb0_ch2_clk", .p = PCK_PARENT_HW_MCK1, .id = 90, .r = { .max = 200000000, }, }, + { .n = "tcb1_ch0_clk", .p = PCK_PARENT_HW_MCK1, .id = 91, .r = { .max = 200000000, }, }, + { .n = "tcb1_ch1_clk", .p = PCK_PARENT_HW_MCK1, .id = 92, .r = { .max = 200000000, }, }, + { .n = "tcb1_ch2_clk", .p = PCK_PARENT_HW_MCK1, .id = 93, .r = { .max = 200000000, }, }, + { .n = "tcpca_clk", .p = PCK_PARENT_HW_MCK1, .id = 94, }, + { .n = "tcpcb_clk", .p = PCK_PARENT_HW_MCK1, .id = 95, }, + { .n = "tdes_clk", .p = PCK_PARENT_HW_MCK1, .id = 96, }, + { .n = "trng_clk", .p = PCK_PARENT_HW_MCK1, .id = 97, }, + { .n = "udphsa_clk", .p = PCK_PARENT_HW_MCK1, .id = 104, }, + { .n = "udphsb_clk", .p = PCK_PARENT_HW_MCK1, .id = 105, }, + { .n = "uhphs_clk", .p = PCK_PARENT_HW_MCK1, .id = 106, }, +}; + +/* + * Generic clock description + * @n: clock name + * @pp: PLL parents (entry formed by PLL components identifiers + * (see enum pll_component_id)) + * @pp_mux_table: PLL parents mux table + * @r: clock output range + * @pp_chg_id: id in parent array of changeable PLL parent + * @pp_count: PLL parents count + * @id: clock id + */ +static const struct { + const char *n; + struct { + int pll_id; + int pll_compid; + } pp[8]; + const char pp_mux_table[8]; + struct clk_range r; + int pp_chg_id; + u8 pp_count; + u8 id; +} sama7g5_gck[] = { + { .n = "adc_gclk", + .id = 26, + .r = { .max = 100000000, }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 5, 7, 9, }, + .pp_count = 3, + .pp_chg_id = INT_MIN, }, + + { .n = "asrc_gclk", + .id = 30, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 9, }, + .pp_count = 1, + .pp_chg_id = 3, }, + + { .n = "csi_gclk", + .id = 33, + .r = { .max = 27000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(DDR, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), }, + .pp_mux_table = { 6, 7, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex0_gclk", + .id = 38, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex1_gclk", + .id = 39, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex2_gclk", + .id = 40, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex3_gclk", + .id = 41, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex4_gclk", + .id = 42, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex5_gclk", + .id = 43, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex6_gclk", + .id = 44, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex7_gclk", + .id = 45, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex8_gclk", + .id = 46, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex9_gclk", + .id = 47, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex10_gclk", + .id = 48, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "flex11_gclk", + .id = 49, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "gmac0_gclk", + .id = 51, + .r = { .max = 125000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 10, }, + .pp_count = 1, + .pp_chg_id = 3, }, + + { .n = "gmac1_gclk", + .id = 52, + .r = { .max = 50000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 10, }, + .pp_count = 1, + .pp_chg_id = INT_MIN, }, + + { .n = "gmac0_tsu_gclk", + .id = 53, + .r = { .max = 300000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 9, 10, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "gmac1_tsu_gclk", + .id = 54, + .r = { .max = 300000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 9, 10, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "i2smcc0_gclk", + .id = 57, + .r = { .max = 100000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 5, 9, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "i2smcc1_gclk", + .id = 58, + .r = { .max = 100000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 5, 9, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "mcan0_gclk", + .id = 61, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "mcan1_gclk", + .id = 62, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "mcan2_gclk", + .id = 63, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "mcan3_gclk", + .id = 64, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "mcan4_gclk", + .id = 65, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "mcan5_gclk", + .id = 66, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "pdmc0_gclk", + .id = 68, + .r = { .max = 50000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 5, 9, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "pdmc1_gclk", + .id = 69, + .r = { .max = 50000000, }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 5, 9, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b0_gclk", + .id = 70, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b1_gclk", + .id = 71, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b2_gclk", + .id = 72, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b3_gclk", + .id = 73, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b4_gclk", + .id = 74, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "pit64b5_gclk", + .id = 75, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "qspi0_gclk", + .id = 78, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "qspi1_gclk", + .id = 79, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = INT_MIN, }, + + { .n = "sdmmc0_gclk", + .id = 80, + .r = { .max = 208000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "sdmmc1_gclk", + .id = 81, + .r = { .max = 208000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "sdmmc2_gclk", + .id = 82, + .r = { .max = 208000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), }, + .pp_mux_table = { 5, 8, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "spdifrx_gclk", + .id = 84, + .r = { .max = 150000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 5, 9, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "spdiftx_gclk", + .id = 85, + .r = { .max = 25000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), }, + .pp_mux_table = { 5, 9, }, + .pp_count = 2, + .pp_chg_id = 4, }, + + { .n = "tcb0_ch0_gclk", + .id = 88, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "tcb1_ch0_gclk", + .id = 91, + .r = { .max = 200000000 }, + .pp = { PLL_IDS_TO_ARR_ENTRY(SYS, DIV0), PLL_IDS_TO_ARR_ENTRY(IMG, DIV0), + PLL_IDS_TO_ARR_ENTRY(BAUD, DIV0), PLL_IDS_TO_ARR_ENTRY(AUDIO, DIV0), + PLL_IDS_TO_ARR_ENTRY(ETH, DIV0), }, + .pp_mux_table = { 5, 7, 8, 9, 10, }, + .pp_count = 5, + .pp_chg_id = INT_MIN, }, + + { .n = "tcpca_gclk", + .id = 94, + .r = { .max = 32768, }, + .pp_chg_id = INT_MIN, }, + + { .n = "tcpcb_gclk", + .id = 95, + .r = { .max = 32768, }, + .pp_chg_id = INT_MIN, }, +}; + +/* MCK0 characteristics. */ +static const struct clk_master_characteristics mck0_characteristics = { + .output = { .min = 32768, .max = 200000000 }, + .divisors = { 1, 2, 4, 3, 5 }, + .have_div3_pres = 1, +}; + +/* MCK0 layout. */ +static const struct clk_master_layout mck0_layout = { + .mask = 0x773, + .pres_shift = 4, + .offset = 0x28, +}; + +/* Programmable clock layout. */ +static const struct clk_programmable_layout programmable_layout = { + .pres_mask = 0xff, + .pres_shift = 8, + .css_mask = 0x1f, + .have_slck_mck = 0, + .is_pres_direct = 1, +}; + +/* Peripheral clock layout. */ +static const struct clk_pcr_layout sama7g5_pcr_layout = { + .offset = 0x88, + .cmd = BIT(31), + .gckcss_mask = GENMASK(12, 8), + .pid_mask = GENMASK(6, 0), +}; + +static void __init sama7g5_pmc_setup(struct device_node *np) +{ + const char *main_xtal_name = "main_xtal"; + struct pmc_data *sama7g5_pmc; + void **alloc_mem = NULL; + int alloc_mem_size = 0; + struct regmap *regmap; + struct clk_hw *hw, *main_rc_hw, *main_osc_hw, *main_xtal_hw; + struct clk_hw *td_slck_hw, *md_slck_hw; + static struct clk_parent_data parent_data; + struct clk_hw *parent_hws[10]; + bool bypass; + int i, j; + + td_slck_hw = __clk_get_hw(of_clk_get_by_name(np, "td_slck")); + md_slck_hw = __clk_get_hw(of_clk_get_by_name(np, "md_slck")); + main_xtal_hw = __clk_get_hw(of_clk_get_by_name(np, main_xtal_name)); + + if (!td_slck_hw || !md_slck_hw || !main_xtal_hw) + return; + + regmap = device_node_to_regmap(np); + if (IS_ERR(regmap)) + return; + + sama7g5_pmc = pmc_data_allocate(PMC_MCK1 + 1, + nck(sama7g5_systemck), + nck(sama7g5_periphck), + nck(sama7g5_gck), 8); + if (!sama7g5_pmc) + return; + + alloc_mem = kmalloc(sizeof(void *) * + (ARRAY_SIZE(sama7g5_mckx) + ARRAY_SIZE(sama7g5_gck)), + GFP_KERNEL); + if (!alloc_mem) + goto err_free; + + main_rc_hw = at91_clk_register_main_rc_osc(regmap, "main_rc_osc", 12000000, + 50000000); + if (IS_ERR(main_rc_hw)) + goto err_free; + + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + + parent_data.name = main_xtal_name; + parent_data.fw_name = main_xtal_name; + main_osc_hw = at91_clk_register_main_osc(regmap, "main_osc", NULL, + &parent_data, bypass); + if (IS_ERR(main_osc_hw)) + goto err_free; + + parent_hws[0] = main_rc_hw; + parent_hws[1] = main_osc_hw; + hw = at91_clk_register_sam9x5_main(regmap, "mainck", NULL, parent_hws, 2); + if (IS_ERR(hw)) + goto err_free; + + sama7g5_pmc->chws[PMC_MAIN] = hw; + + for (i = 0; i < PLL_ID_MAX; i++) { + for (j = 0; j < PLL_COMPID_MAX; j++) { + struct clk_hw *parent_hw; + + if (!sama7g5_plls[i][j].n) + continue; + + switch (sama7g5_plls[i][j].t) { + case PLL_TYPE_FRAC: + switch (sama7g5_plls[i][j].p) { + case SAMA7G5_PLL_PARENT_MAINCK: + parent_hw = sama7g5_pmc->chws[PMC_MAIN]; + break; + case SAMA7G5_PLL_PARENT_MAIN_XTAL: + parent_hw = main_xtal_hw; + break; + default: + /* Should not happen. */ + parent_hw = NULL; + break; + } + + hw = sam9x60_clk_register_frac_pll(regmap, + &pmc_pll_lock, sama7g5_plls[i][j].n, + NULL, parent_hw, i, + sama7g5_plls[i][j].c, + sama7g5_plls[i][j].l, + sama7g5_plls[i][j].f); + break; + + case PLL_TYPE_DIV: + hw = sam9x60_clk_register_div_pll(regmap, + &pmc_pll_lock, sama7g5_plls[i][j].n, + NULL, sama7g5_plls[i][0].hw, i, + sama7g5_plls[i][j].c, + sama7g5_plls[i][j].l, + sama7g5_plls[i][j].f, + sama7g5_plls[i][j].safe_div); + break; + + default: + continue; + } + + if (IS_ERR(hw)) + goto err_free; + + sama7g5_plls[i][j].hw = hw; + if (sama7g5_plls[i][j].eid) + sama7g5_pmc->chws[sama7g5_plls[i][j].eid] = hw; + } + } + + hw = at91_clk_register_master_div(regmap, "mck0", NULL, + sama7g5_plls[PLL_ID_CPU][1].hw, + &mck0_layout, &mck0_characteristics, + &pmc_mck0_lock, CLK_GET_RATE_NOCACHE, 5); + if (IS_ERR(hw)) + goto err_free; + + sama7g5_mckx[PCK_PARENT_HW_MCK0].hw = sama7g5_pmc->chws[PMC_MCK] = hw; + + parent_hws[0] = md_slck_hw; + parent_hws[1] = td_slck_hw; + parent_hws[2] = sama7g5_pmc->chws[PMC_MAIN]; + for (i = PCK_PARENT_HW_MCK1; i < ARRAY_SIZE(sama7g5_mckx); i++) { + u8 num_parents = 3 + sama7g5_mckx[i].ep_count; + struct clk_hw *tmp_parent_hws[8]; + u32 *mux_table; + + mux_table = kmalloc_array(num_parents, sizeof(*mux_table), + GFP_KERNEL); + if (!mux_table) + goto err_free; + + PMC_INIT_TABLE(mux_table, 3); + PMC_FILL_TABLE(&mux_table[3], sama7g5_mckx[i].ep_mux_table, + sama7g5_mckx[i].ep_count); + for (j = 0; j < sama7g5_mckx[i].ep_count; j++) { + u8 pll_id = sama7g5_mckx[i].ep[j].pll_id; + u8 pll_compid = sama7g5_mckx[i].ep[j].pll_compid; + + tmp_parent_hws[j] = sama7g5_plls[pll_id][pll_compid].hw; + } + PMC_FILL_TABLE(&parent_hws[3], tmp_parent_hws, + sama7g5_mckx[i].ep_count); + + hw = at91_clk_sama7g5_register_master(regmap, sama7g5_mckx[i].n, + num_parents, NULL, parent_hws, mux_table, + &pmc_mckX_lock, sama7g5_mckx[i].id, + sama7g5_mckx[i].c, + sama7g5_mckx[i].ep_chg_id); + if (IS_ERR(hw)) + goto err_free; + + alloc_mem[alloc_mem_size++] = mux_table; + + sama7g5_mckx[i].hw = hw; + if (sama7g5_mckx[i].eid) + sama7g5_pmc->chws[sama7g5_mckx[i].eid] = hw; + } + + hw = at91_clk_sama7g5_register_utmi(regmap, "utmick", NULL, main_xtal_hw); + if (IS_ERR(hw)) + goto err_free; + + sama7g5_pmc->chws[PMC_UTMI] = hw; + + parent_hws[0] = md_slck_hw; + parent_hws[1] = td_slck_hw; + parent_hws[2] = sama7g5_pmc->chws[PMC_MAIN]; + parent_hws[3] = sama7g5_plls[PLL_ID_SYS][PLL_COMPID_DIV0].hw; + parent_hws[4] = sama7g5_plls[PLL_ID_DDR][PLL_COMPID_DIV0].hw; + parent_hws[5] = sama7g5_plls[PLL_ID_IMG][PLL_COMPID_DIV0].hw; + parent_hws[6] = sama7g5_plls[PLL_ID_BAUD][PLL_COMPID_DIV0].hw; + parent_hws[7] = sama7g5_plls[PLL_ID_AUDIO][PLL_COMPID_DIV0].hw; + parent_hws[8] = sama7g5_plls[PLL_ID_ETH][PLL_COMPID_DIV0].hw; + for (i = 0; i < 8; i++) { + char name[6]; + + snprintf(name, sizeof(name), "prog%d", i); + + hw = at91_clk_register_programmable(regmap, name, NULL, parent_hws, + 9, i, + &programmable_layout, + sama7g5_prog_mux_table); + if (IS_ERR(hw)) + goto err_free; + + sama7g5_pmc->pchws[i] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama7g5_systemck); i++) { + hw = at91_clk_register_system(regmap, sama7g5_systemck[i].n, + NULL, sama7g5_pmc->pchws[i], + sama7g5_systemck[i].id, 0); + if (IS_ERR(hw)) + goto err_free; + + sama7g5_pmc->shws[sama7g5_systemck[i].id] = hw; + } + + for (i = 0; i < ARRAY_SIZE(sama7g5_periphck); i++) { + hw = at91_clk_register_sam9x5_peripheral(regmap, &pmc_pcr_lock, + &sama7g5_pcr_layout, + sama7g5_periphck[i].n, + NULL, + sama7g5_mckx[sama7g5_periphck[i].p].hw, + sama7g5_periphck[i].id, + &sama7g5_periphck[i].r, + sama7g5_periphck[i].chgp ? 0 : + INT_MIN, 0); + if (IS_ERR(hw)) + goto err_free; + + sama7g5_pmc->phws[sama7g5_periphck[i].id] = hw; + } + + parent_hws[0] = md_slck_hw; + parent_hws[1] = td_slck_hw; + parent_hws[2] = sama7g5_pmc->chws[PMC_MAIN]; + for (i = 0; i < ARRAY_SIZE(sama7g5_gck); i++) { + u8 num_parents = 3 + sama7g5_gck[i].pp_count; + struct clk_hw *tmp_parent_hws[8]; + u32 *mux_table; + + mux_table = kmalloc_array(num_parents, sizeof(*mux_table), + GFP_KERNEL); + if (!mux_table) + goto err_free; + + PMC_INIT_TABLE(mux_table, 3); + PMC_FILL_TABLE(&mux_table[3], sama7g5_gck[i].pp_mux_table, + sama7g5_gck[i].pp_count); + for (j = 0; j < sama7g5_gck[i].pp_count; j++) { + u8 pll_id = sama7g5_gck[i].pp[j].pll_id; + u8 pll_compid = sama7g5_gck[i].pp[j].pll_compid; + + tmp_parent_hws[j] = sama7g5_plls[pll_id][pll_compid].hw; + } + PMC_FILL_TABLE(&parent_hws[3], tmp_parent_hws, + sama7g5_gck[i].pp_count); + + hw = at91_clk_register_generated(regmap, &pmc_pcr_lock, + &sama7g5_pcr_layout, + sama7g5_gck[i].n, NULL, + parent_hws, mux_table, + num_parents, + sama7g5_gck[i].id, + &sama7g5_gck[i].r, + sama7g5_gck[i].pp_chg_id); + if (IS_ERR(hw)) + goto err_free; + + sama7g5_pmc->ghws[sama7g5_gck[i].id] = hw; + alloc_mem[alloc_mem_size++] = mux_table; + } + + of_clk_add_hw_provider(np, of_clk_hw_pmc_get, sama7g5_pmc); + + return; + +err_free: + if (alloc_mem) { + for (i = 0; i < alloc_mem_size; i++) + kfree(alloc_mem[i]); + kfree(alloc_mem); + } + + kfree(sama7g5_pmc); +} + +/* Some clks are used for a clocksource */ +CLK_OF_DECLARE(sama7g5_pmc, "microchip,sama7g5-pmc", sama7g5_pmc_setup); diff --git a/drivers/clk/at91/sckc.c b/drivers/clk/at91/sckc.c new file mode 100644 index 000000000..776118f14 --- /dev/null +++ b/drivers/clk/at91/sckc.c @@ -0,0 +1,657 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * drivers/clk/at91/sckc.c + * + * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> + */ + +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/delay.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/io.h> + +#include <dt-bindings/clock/at91.h> + +#define SLOW_CLOCK_FREQ 32768 +#define SLOWCK_SW_CYCLES 5 +#define SLOWCK_SW_TIME_USEC ((SLOWCK_SW_CYCLES * USEC_PER_SEC) / \ + SLOW_CLOCK_FREQ) + +#define AT91_SCKC_CR 0x00 + +struct clk_slow_bits { + u32 cr_rcen; + u32 cr_osc32en; + u32 cr_osc32byp; + u32 cr_oscsel; +}; + +struct clk_slow_osc { + struct clk_hw hw; + void __iomem *sckcr; + const struct clk_slow_bits *bits; + unsigned long startup_usec; +}; + +#define to_clk_slow_osc(hw) container_of(hw, struct clk_slow_osc, hw) + +struct clk_sama5d4_slow_osc { + struct clk_hw hw; + void __iomem *sckcr; + const struct clk_slow_bits *bits; + unsigned long startup_usec; + bool prepared; +}; + +#define to_clk_sama5d4_slow_osc(hw) container_of(hw, struct clk_sama5d4_slow_osc, hw) + +struct clk_slow_rc_osc { + struct clk_hw hw; + void __iomem *sckcr; + const struct clk_slow_bits *bits; + unsigned long frequency; + unsigned long accuracy; + unsigned long startup_usec; +}; + +#define to_clk_slow_rc_osc(hw) container_of(hw, struct clk_slow_rc_osc, hw) + +struct clk_sam9x5_slow { + struct clk_hw hw; + void __iomem *sckcr; + const struct clk_slow_bits *bits; + u8 parent; +}; + +#define to_clk_sam9x5_slow(hw) container_of(hw, struct clk_sam9x5_slow, hw) + +static int clk_slow_osc_prepare(struct clk_hw *hw) +{ + struct clk_slow_osc *osc = to_clk_slow_osc(hw); + void __iomem *sckcr = osc->sckcr; + u32 tmp = readl(sckcr); + + if (tmp & (osc->bits->cr_osc32byp | osc->bits->cr_osc32en)) + return 0; + + writel(tmp | osc->bits->cr_osc32en, sckcr); + + if (system_state < SYSTEM_RUNNING) + udelay(osc->startup_usec); + else + usleep_range(osc->startup_usec, osc->startup_usec + 1); + + return 0; +} + +static void clk_slow_osc_unprepare(struct clk_hw *hw) +{ + struct clk_slow_osc *osc = to_clk_slow_osc(hw); + void __iomem *sckcr = osc->sckcr; + u32 tmp = readl(sckcr); + + if (tmp & osc->bits->cr_osc32byp) + return; + + writel(tmp & ~osc->bits->cr_osc32en, sckcr); +} + +static int clk_slow_osc_is_prepared(struct clk_hw *hw) +{ + struct clk_slow_osc *osc = to_clk_slow_osc(hw); + void __iomem *sckcr = osc->sckcr; + u32 tmp = readl(sckcr); + + if (tmp & osc->bits->cr_osc32byp) + return 1; + + return !!(tmp & osc->bits->cr_osc32en); +} + +static const struct clk_ops slow_osc_ops = { + .prepare = clk_slow_osc_prepare, + .unprepare = clk_slow_osc_unprepare, + .is_prepared = clk_slow_osc_is_prepared, +}; + +static struct clk_hw * __init +at91_clk_register_slow_osc(void __iomem *sckcr, + const char *name, + const struct clk_parent_data *parent_data, + unsigned long startup, + bool bypass, + const struct clk_slow_bits *bits) +{ + struct clk_slow_osc *osc; + struct clk_hw *hw; + struct clk_init_data init = {}; + int ret; + + if (!sckcr || !name || !parent_data) + return ERR_PTR(-EINVAL); + + osc = kzalloc_obj(*osc); + if (!osc) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &slow_osc_ops; + init.parent_data = parent_data; + init.num_parents = 1; + init.flags = CLK_IGNORE_UNUSED; + + osc->hw.init = &init; + osc->sckcr = sckcr; + osc->startup_usec = startup; + osc->bits = bits; + + if (bypass) + writel((readl(sckcr) & ~osc->bits->cr_osc32en) | + osc->bits->cr_osc32byp, sckcr); + + hw = &osc->hw; + ret = clk_hw_register(NULL, &osc->hw); + if (ret) { + kfree(osc); + hw = ERR_PTR(ret); + } + + return hw; +} + +static void at91_clk_unregister_slow_osc(struct clk_hw *hw) +{ + struct clk_slow_osc *osc = to_clk_slow_osc(hw); + + clk_hw_unregister(hw); + kfree(osc); +} + +static unsigned long clk_slow_rc_osc_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw); + + return osc->frequency; +} + +static unsigned long clk_slow_rc_osc_recalc_accuracy(struct clk_hw *hw, + unsigned long parent_acc) +{ + struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw); + + return osc->accuracy; +} + +static int clk_slow_rc_osc_prepare(struct clk_hw *hw) +{ + struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw); + void __iomem *sckcr = osc->sckcr; + + writel(readl(sckcr) | osc->bits->cr_rcen, sckcr); + + if (system_state < SYSTEM_RUNNING) + udelay(osc->startup_usec); + else + usleep_range(osc->startup_usec, osc->startup_usec + 1); + + return 0; +} + +static void clk_slow_rc_osc_unprepare(struct clk_hw *hw) +{ + struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw); + void __iomem *sckcr = osc->sckcr; + + writel(readl(sckcr) & ~osc->bits->cr_rcen, sckcr); +} + +static int clk_slow_rc_osc_is_prepared(struct clk_hw *hw) +{ + struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw); + + return !!(readl(osc->sckcr) & osc->bits->cr_rcen); +} + +static const struct clk_ops slow_rc_osc_ops = { + .prepare = clk_slow_rc_osc_prepare, + .unprepare = clk_slow_rc_osc_unprepare, + .is_prepared = clk_slow_rc_osc_is_prepared, + .recalc_rate = clk_slow_rc_osc_recalc_rate, + .recalc_accuracy = clk_slow_rc_osc_recalc_accuracy, +}; + +static struct clk_hw * __init +at91_clk_register_slow_rc_osc(void __iomem *sckcr, + const char *name, + unsigned long frequency, + unsigned long accuracy, + unsigned long startup, + const struct clk_slow_bits *bits) +{ + struct clk_slow_rc_osc *osc; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + if (!sckcr || !name) + return ERR_PTR(-EINVAL); + + osc = kzalloc_obj(*osc); + if (!osc) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &slow_rc_osc_ops; + init.parent_names = NULL; + init.num_parents = 0; + init.flags = CLK_IGNORE_UNUSED; + + osc->hw.init = &init; + osc->sckcr = sckcr; + osc->bits = bits; + osc->frequency = frequency; + osc->accuracy = accuracy; + osc->startup_usec = startup; + + hw = &osc->hw; + ret = clk_hw_register(NULL, &osc->hw); + if (ret) { + kfree(osc); + hw = ERR_PTR(ret); + } + + return hw; +} + +static void at91_clk_unregister_slow_rc_osc(struct clk_hw *hw) +{ + struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw); + + clk_hw_unregister(hw); + kfree(osc); +} + +static int clk_sam9x5_slow_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_sam9x5_slow *slowck = to_clk_sam9x5_slow(hw); + void __iomem *sckcr = slowck->sckcr; + u32 tmp; + + if (index > 1) + return -EINVAL; + + tmp = readl(sckcr); + + if ((!index && !(tmp & slowck->bits->cr_oscsel)) || + (index && (tmp & slowck->bits->cr_oscsel))) + return 0; + + if (index) + tmp |= slowck->bits->cr_oscsel; + else + tmp &= ~slowck->bits->cr_oscsel; + + writel(tmp, sckcr); + + if (system_state < SYSTEM_RUNNING) + udelay(SLOWCK_SW_TIME_USEC); + else + usleep_range(SLOWCK_SW_TIME_USEC, SLOWCK_SW_TIME_USEC + 1); + + return 0; +} + +static u8 clk_sam9x5_slow_get_parent(struct clk_hw *hw) +{ + struct clk_sam9x5_slow *slowck = to_clk_sam9x5_slow(hw); + + return !!(readl(slowck->sckcr) & slowck->bits->cr_oscsel); +} + +static const struct clk_ops sam9x5_slow_ops = { + .determine_rate = clk_hw_determine_rate_no_reparent, + .set_parent = clk_sam9x5_slow_set_parent, + .get_parent = clk_sam9x5_slow_get_parent, +}; + +static struct clk_hw * __init +at91_clk_register_sam9x5_slow(void __iomem *sckcr, + const char *name, + const struct clk_hw **parent_hws, + int num_parents, + const struct clk_slow_bits *bits) +{ + struct clk_sam9x5_slow *slowck; + struct clk_hw *hw; + struct clk_init_data init = {}; + int ret; + + if (!sckcr || !name || !parent_hws || !num_parents) + return ERR_PTR(-EINVAL); + + slowck = kzalloc_obj(*slowck); + if (!slowck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &sam9x5_slow_ops; + init.parent_hws = parent_hws; + init.num_parents = num_parents; + init.flags = 0; + + slowck->hw.init = &init; + slowck->sckcr = sckcr; + slowck->bits = bits; + slowck->parent = !!(readl(sckcr) & slowck->bits->cr_oscsel); + + hw = &slowck->hw; + ret = clk_hw_register(NULL, &slowck->hw); + if (ret) { + kfree(slowck); + hw = ERR_PTR(ret); + } + + return hw; +} + +static void at91_clk_unregister_sam9x5_slow(struct clk_hw *hw) +{ + struct clk_sam9x5_slow *slowck = to_clk_sam9x5_slow(hw); + + clk_hw_unregister(hw); + kfree(slowck); +} + +static void __init at91sam9x5_sckc_register(struct device_node *np, + unsigned int rc_osc_startup_us, + const struct clk_slow_bits *bits) +{ + void __iomem *regbase = of_iomap(np, 0); + struct device_node *child = NULL; + const char *xtal_name; + struct clk_hw *slow_rc, *slow_osc, *slowck; + static struct clk_parent_data parent_data = { + .name = "slow_xtal", + }; + const struct clk_hw *parent_hws[2]; + bool bypass; + int ret; + + if (!regbase) + return; + + slow_rc = at91_clk_register_slow_rc_osc(regbase, "slow_rc_osc", + 32768, 50000000, + rc_osc_startup_us, bits); + if (IS_ERR(slow_rc)) + return; + + xtal_name = of_clk_get_parent_name(np, 0); + if (!xtal_name) { + /* DT backward compatibility */ + child = of_get_compatible_child(np, "atmel,at91sam9x5-clk-slow-osc"); + if (!child) + goto unregister_slow_rc; + + xtal_name = of_clk_get_parent_name(child, 0); + bypass = of_property_read_bool(child, "atmel,osc-bypass"); + + child = of_get_compatible_child(np, "atmel,at91sam9x5-clk-slow"); + } else { + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + } + + if (!xtal_name) + goto unregister_slow_rc; + + parent_data.fw_name = xtal_name; + + slow_osc = at91_clk_register_slow_osc(regbase, "slow_osc", + &parent_data, 1200000, bypass, bits); + if (IS_ERR(slow_osc)) + goto unregister_slow_rc; + + parent_hws[0] = slow_rc; + parent_hws[1] = slow_osc; + slowck = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_hws, + 2, bits); + if (IS_ERR(slowck)) + goto unregister_slow_osc; + + /* DT backward compatibility */ + if (child) + ret = of_clk_add_hw_provider(child, of_clk_hw_simple_get, + slowck); + else + ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, slowck); + + if (WARN_ON(ret)) + goto unregister_slowck; + + return; + +unregister_slowck: + at91_clk_unregister_sam9x5_slow(slowck); +unregister_slow_osc: + at91_clk_unregister_slow_osc(slow_osc); +unregister_slow_rc: + at91_clk_unregister_slow_rc_osc(slow_rc); +} + +static const struct clk_slow_bits at91sam9x5_bits = { + .cr_rcen = BIT(0), + .cr_osc32en = BIT(1), + .cr_osc32byp = BIT(2), + .cr_oscsel = BIT(3), +}; + +static void __init of_at91sam9x5_sckc_setup(struct device_node *np) +{ + at91sam9x5_sckc_register(np, 75, &at91sam9x5_bits); +} +CLK_OF_DECLARE(at91sam9x5_clk_sckc, "atmel,at91sam9x5-sckc", + of_at91sam9x5_sckc_setup); + +static void __init of_sama5d3_sckc_setup(struct device_node *np) +{ + at91sam9x5_sckc_register(np, 500, &at91sam9x5_bits); +} +CLK_OF_DECLARE(sama5d3_clk_sckc, "atmel,sama5d3-sckc", + of_sama5d3_sckc_setup); + +static const struct clk_slow_bits at91sam9x60_bits = { + .cr_osc32en = BIT(1), + .cr_osc32byp = BIT(2), + .cr_oscsel = BIT(24), +}; + +static void __init of_sam9x60_sckc_setup(struct device_node *np) +{ + void __iomem *regbase = of_iomap(np, 0); + struct clk_hw_onecell_data *clk_data; + struct clk_hw *slow_rc, *slow_osc, *hw; + const char *xtal_name; + const struct clk_hw *parent_hws[2]; + static struct clk_parent_data parent_data = { + .name = "slow_xtal", + }; + bool bypass; + int ret; + + if (!regbase) + return; + + slow_rc = clk_hw_register_fixed_rate_with_accuracy(NULL, "slow_rc_osc", + NULL, 0, 32768, + 93750000); + if (IS_ERR(slow_rc)) + return; + + xtal_name = of_clk_get_parent_name(np, 0); + if (!xtal_name) + goto unregister_slow_rc; + + parent_data.fw_name = xtal_name; + bypass = of_property_read_bool(np, "atmel,osc-bypass"); + slow_osc = at91_clk_register_slow_osc(regbase, "slow_osc", + &parent_data, 5000000, bypass, + &at91sam9x60_bits); + if (IS_ERR(slow_osc)) + goto unregister_slow_rc; + + clk_data = kzalloc_flex(*clk_data, hws, 2); + if (!clk_data) + goto unregister_slow_osc; + + /* MD_SLCK and TD_SLCK. */ + clk_data->num = 2; + hw = clk_hw_register_fixed_rate_parent_hw(NULL, "md_slck", slow_rc, + 0, 32768); + if (IS_ERR(hw)) + goto clk_data_free; + clk_data->hws[SCKC_MD_SLCK] = hw; + + parent_hws[0] = slow_rc; + parent_hws[1] = slow_osc; + hw = at91_clk_register_sam9x5_slow(regbase, "td_slck", parent_hws, + 2, &at91sam9x60_bits); + if (IS_ERR(hw)) + goto unregister_md_slck; + clk_data->hws[SCKC_TD_SLCK] = hw; + + ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data); + if (WARN_ON(ret)) + goto unregister_td_slck; + + return; + +unregister_td_slck: + at91_clk_unregister_sam9x5_slow(clk_data->hws[SCKC_TD_SLCK]); +unregister_md_slck: + clk_hw_unregister(clk_data->hws[SCKC_MD_SLCK]); +clk_data_free: + kfree(clk_data); +unregister_slow_osc: + at91_clk_unregister_slow_osc(slow_osc); +unregister_slow_rc: + clk_hw_unregister(slow_rc); +} +CLK_OF_DECLARE(sam9x60_clk_sckc, "microchip,sam9x60-sckc", + of_sam9x60_sckc_setup); + +static int clk_sama5d4_slow_osc_prepare(struct clk_hw *hw) +{ + struct clk_sama5d4_slow_osc *osc = to_clk_sama5d4_slow_osc(hw); + + if (osc->prepared) + return 0; + + /* + * Assume that if it has already been selected (for example by the + * bootloader), enough time has already passed. + */ + if ((readl(osc->sckcr) & osc->bits->cr_oscsel)) { + osc->prepared = true; + return 0; + } + + if (system_state < SYSTEM_RUNNING) + udelay(osc->startup_usec); + else + usleep_range(osc->startup_usec, osc->startup_usec + 1); + osc->prepared = true; + + return 0; +} + +static int clk_sama5d4_slow_osc_is_prepared(struct clk_hw *hw) +{ + struct clk_sama5d4_slow_osc *osc = to_clk_sama5d4_slow_osc(hw); + + return osc->prepared; +} + +static const struct clk_ops sama5d4_slow_osc_ops = { + .prepare = clk_sama5d4_slow_osc_prepare, + .is_prepared = clk_sama5d4_slow_osc_is_prepared, +}; + +static const struct clk_slow_bits at91sama5d4_bits = { + .cr_oscsel = BIT(3), +}; + +static void __init of_sama5d4_sckc_setup(struct device_node *np) +{ + void __iomem *regbase = of_iomap(np, 0); + struct clk_hw *slow_rc, *slowck; + struct clk_sama5d4_slow_osc *osc; + struct clk_init_data init = {}; + const char *xtal_name; + const struct clk_hw *parent_hws[2]; + static struct clk_parent_data parent_data = { + .name = "slow_xtal", + }; + int ret; + + if (!regbase) + return; + + slow_rc = clk_hw_register_fixed_rate_with_accuracy(NULL, + "slow_rc_osc", + NULL, 0, 32768, + 250000000); + if (IS_ERR(slow_rc)) + return; + + xtal_name = of_clk_get_parent_name(np, 0); + if (!xtal_name) + goto unregister_slow_rc; + parent_data.fw_name = xtal_name; + + osc = kzalloc_obj(*osc); + if (!osc) + goto unregister_slow_rc; + + init.name = "slow_osc"; + init.ops = &sama5d4_slow_osc_ops; + init.parent_data = &parent_data; + init.num_parents = 1; + init.flags = CLK_IGNORE_UNUSED; + + osc->hw.init = &init; + osc->sckcr = regbase; + osc->startup_usec = 1200000; + osc->bits = &at91sama5d4_bits; + + ret = clk_hw_register(NULL, &osc->hw); + if (ret) + goto free_slow_osc_data; + + parent_hws[0] = slow_rc; + parent_hws[1] = &osc->hw; + slowck = at91_clk_register_sam9x5_slow(regbase, "slowck", + parent_hws, 2, + &at91sama5d4_bits); + if (IS_ERR(slowck)) + goto unregister_slow_osc; + + ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, slowck); + if (WARN_ON(ret)) + goto unregister_slowck; + + return; + +unregister_slowck: + at91_clk_unregister_sam9x5_slow(slowck); +unregister_slow_osc: + clk_hw_unregister(&osc->hw); +free_slow_osc_data: + kfree(osc); +unregister_slow_rc: + clk_hw_unregister(slow_rc); +} +CLK_OF_DECLARE(sama5d4_clk_sckc, "atmel,sama5d4-sckc", + of_sama5d4_sckc_setup); |
