From cf9610f9116d55c5a66ef9f1faecacabd93a9322 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 24 Aug 2026 08:46:03 -0700 Subject: Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl 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 ... --- drivers/char/adi.c | 232 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 232 insertions(+) create mode 100644 drivers/char/adi.c (limited to 'drivers/char/adi.c') diff --git a/drivers/char/adi.c b/drivers/char/adi.c new file mode 100644 index 000000000..0849d933a --- /dev/null +++ b/drivers/char/adi.c @@ -0,0 +1,232 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Privileged ADI driver for sparc64 + * + * Author: Tom Hromatka + */ +#include +#include +#include +#include +#include +#include +#include + +#define MAX_BUF_SZ PAGE_SIZE + +static int read_mcd_tag(unsigned long addr) +{ + long err; + int ver; + + __asm__ __volatile__( + "1: ldxa [%[addr]] %[asi], %[ver]\n" + " mov 0, %[err]\n" + "2:\n" + " .section .fixup,#alloc,#execinstr\n" + " .align 4\n" + "3: sethi %%hi(2b), %%g1\n" + " jmpl %%g1 + %%lo(2b), %%g0\n" + " mov %[invalid], %[err]\n" + " .previous\n" + " .section __ex_table, \"a\"\n" + " .align 4\n" + " .word 1b, 3b\n" + " .previous\n" + : [ver] "=r" (ver), [err] "=r" (err) + : [addr] "r" (addr), [invalid] "i" (EFAULT), + [asi] "i" (ASI_MCD_REAL) + : "memory", "g1" + ); + + if (err) + return -EFAULT; + else + return ver; +} + +static ssize_t adi_read(struct file *file, char __user *buf, + size_t count, loff_t *offp) +{ + size_t ver_buf_sz, bytes_read = 0; + int ver_buf_idx = 0; + loff_t offset; + u8 *ver_buf; + ssize_t ret; + + ver_buf_sz = min_t(size_t, count, MAX_BUF_SZ); + ver_buf = kmalloc(ver_buf_sz, GFP_KERNEL); + if (!ver_buf) + return -ENOMEM; + + offset = (*offp) * adi_blksize(); + + while (bytes_read < count) { + ret = read_mcd_tag(offset); + if (ret < 0) + goto out; + + ver_buf[ver_buf_idx] = (u8)ret; + ver_buf_idx++; + offset += adi_blksize(); + + if (ver_buf_idx >= ver_buf_sz) { + if (copy_to_user(buf + bytes_read, ver_buf, + ver_buf_sz)) { + ret = -EFAULT; + goto out; + } + + bytes_read += ver_buf_sz; + ver_buf_idx = 0; + + ver_buf_sz = min_t(size_t, count - bytes_read, + MAX_BUF_SZ); + } + } + + (*offp) += bytes_read; + ret = bytes_read; +out: + kfree(ver_buf); + return ret; +} + +static int set_mcd_tag(unsigned long addr, u8 ver) +{ + long err; + + __asm__ __volatile__( + "1: stxa %[ver], [%[addr]] %[asi]\n" + " mov 0, %[err]\n" + "2:\n" + " .section .fixup,#alloc,#execinstr\n" + " .align 4\n" + "3: sethi %%hi(2b), %%g1\n" + " jmpl %%g1 + %%lo(2b), %%g0\n" + " mov %[invalid], %[err]\n" + " .previous\n" + " .section __ex_table, \"a\"\n" + " .align 4\n" + " .word 1b, 3b\n" + " .previous\n" + : [err] "=r" (err) + : [ver] "r" (ver), [addr] "r" (addr), + [invalid] "i" (EFAULT), [asi] "i" (ASI_MCD_REAL) + : "memory", "g1" + ); + + if (err) + return -EFAULT; + else + return ver; +} + +static ssize_t adi_write(struct file *file, const char __user *buf, + size_t count, loff_t *offp) +{ + size_t ver_buf_sz, bytes_written = 0; + loff_t offset; + u8 *ver_buf; + ssize_t ret; + int i; + + if (count == 0) + return -EINVAL; + + ver_buf_sz = min_t(size_t, count, MAX_BUF_SZ); + ver_buf = kmalloc(ver_buf_sz, GFP_KERNEL); + if (!ver_buf) + return -ENOMEM; + + offset = (*offp) * adi_blksize(); + + do { + if (copy_from_user(ver_buf, &buf[bytes_written], + ver_buf_sz)) { + ret = -EFAULT; + goto out; + } + + for (i = 0; i < ver_buf_sz; i++) { + ret = set_mcd_tag(offset, ver_buf[i]); + if (ret < 0) + goto out; + + offset += adi_blksize(); + } + + bytes_written += ver_buf_sz; + ver_buf_sz = min_t(size_t, count - bytes_written, MAX_BUF_SZ); + } while (bytes_written < count); + + (*offp) += bytes_written; + ret = bytes_written; +out: + __asm__ __volatile__("membar #Sync"); + kfree(ver_buf); + return ret; +} + +static loff_t adi_llseek(struct file *file, loff_t offset, int whence) +{ + loff_t ret = -EINVAL; + + switch (whence) { + case SEEK_END: + case SEEK_DATA: + case SEEK_HOLE: + /* unsupported */ + return -EINVAL; + case SEEK_CUR: + if (offset == 0) + return file->f_pos; + + offset += file->f_pos; + break; + case SEEK_SET: + break; + } + + if (offset != file->f_pos) { + file->f_pos = offset; + ret = offset; + } + + return ret; +} + +static const struct file_operations adi_fops = { + .owner = THIS_MODULE, + .llseek = adi_llseek, + .read = adi_read, + .write = adi_write, + .fop_flags = FOP_UNSIGNED_OFFSET, +}; + +static struct miscdevice adi_miscdev = { + .minor = MISC_DYNAMIC_MINOR, + .name = KBUILD_MODNAME, + .fops = &adi_fops, +}; + +static int __init adi_init(void) +{ + if (!adi_capable()) + return -EPERM; + + return misc_register(&adi_miscdev); +} + +static void __exit adi_exit(void) +{ + misc_deregister(&adi_miscdev); +} + +module_init(adi_init); +module_exit(adi_exit); + +MODULE_AUTHOR("Tom Hromatka "); +MODULE_DESCRIPTION("Privileged interface to ADI"); +MODULE_VERSION("1.0"); +MODULE_LICENSE("GPL v2"); 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