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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /arch/powerpc/boot/simpleboot.c
downloadlinux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz
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Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'arch/powerpc/boot/simpleboot.c')
-rw-r--r--arch/powerpc/boot/simpleboot.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/powerpc/boot/simpleboot.c b/arch/powerpc/boot/simpleboot.c
new file mode 100644
index 000000000..27591df41
--- /dev/null
+++ b/arch/powerpc/boot/simpleboot.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * The simple platform -- for booting when firmware doesn't supply a device
+ * tree or any platform configuration information.
+ * All data is extracted from an embedded device tree
+ * blob.
+ *
+ * Authors: Scott Wood <scottwood@freescale.com>
+ * Grant Likely <grant.likely@secretlab.ca>
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ * Copyright (c) 2008 Secret Lab Technologies Ltd.
+ */
+
+#include "ops.h"
+#include "types.h"
+#include "io.h"
+#include "stdio.h"
+#include <libfdt.h>
+
+BSS_STACK(4*1024);
+
+extern int platform_specific_init(void) __attribute__((weak));
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+ const u32 *na, *ns, *reg, *timebase;
+ u64 memsize64;
+ int node, size, i;
+
+ /* Make sure FDT blob is sane */
+ if (fdt_check_header(_dtb_start) != 0)
+ fatal("Invalid device tree blob\n");
+
+ /* Find the #address-cells and #size-cells properties */
+ node = fdt_path_offset(_dtb_start, "/");
+ if (node < 0)
+ fatal("Cannot find root node\n");
+ na = fdt_getprop(_dtb_start, node, "#address-cells", &size);
+ if (!na || (size != 4))
+ fatal("Cannot find #address-cells property");
+ ns = fdt_getprop(_dtb_start, node, "#size-cells", &size);
+ if (!ns || (size != 4))
+ fatal("Cannot find #size-cells property");
+
+ /* Find the memory range */
+ node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
+ "memory", sizeof("memory"));
+ if (node < 0)
+ fatal("Cannot find memory node\n");
+ reg = fdt_getprop(_dtb_start, node, "reg", &size);
+ if (size < (*na+*ns) * sizeof(u32))
+ fatal("cannot get memory range\n");
+
+ /* Only interested in memory based at 0 */
+ for (i = 0; i < *na; i++)
+ if (*reg++ != 0)
+ fatal("Memory range is not based at address 0\n");
+
+ /* get the memsize and truncate it to under 4G on 32 bit machines */
+ memsize64 = 0;
+ for (i = 0; i < *ns; i++)
+ memsize64 = (memsize64 << 32) | *reg++;
+ if (sizeof(void *) == 4 && memsize64 >= 0x100000000ULL)
+ memsize64 = 0xffffffff;
+
+ /* finally, setup the timebase */
+ node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
+ "cpu", sizeof("cpu"));
+ if (node < 0)
+ fatal("Cannot find cpu node\n");
+ timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
+ if (timebase && (size == 4))
+ timebase_period_ns = 1000000000 / *timebase;
+
+ /* Now we have the memory size; initialize the heap */
+ simple_alloc_init(_end, memsize64 - (unsigned long)_end, 32, 64);
+
+ /* prepare the device tree and find the console */
+ fdt_init(_dtb_start);
+
+ if (platform_specific_init)
+ platform_specific_init();
+
+ serial_console_init();
+}