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/mfd/ab8500-sysctrl.c | 169 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 169 insertions(+) create mode 100644 drivers/mfd/ab8500-sysctrl.c (limited to 'drivers/mfd/ab8500-sysctrl.c') diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c new file mode 100644 index 000000000..b6b44e2e3 --- /dev/null +++ b/drivers/mfd/ab8500-sysctrl.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AB8500 system control driver + * + * Copyright (C) ST-Ericsson SA 2010 + * Author: Mattias Nilsson for ST Ericsson. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* RtcCtrl bits */ +#define AB8500_ALARM_MIN_LOW 0x08 +#define AB8500_ALARM_MIN_MID 0x09 +#define RTC_CTRL 0x0B +#define RTC_ALARM_ENABLE 0x4 + +static struct device *sysctrl_dev; + +static void ab8500_power_off(void) +{ + sigset_t old; + sigset_t all; + static const char * const pss[] = {"ab8500_ac", "ab8500_usb"}; + int i; + bool charger_present = false; + union power_supply_propval val; + struct power_supply *psy; + int ret; + + if (sysctrl_dev == NULL) { + pr_err("%s: sysctrl not initialized\n", __func__); + return; + } + + /* + * If we have a charger connected and we're powering off, + * reboot into charge-only mode. + */ + + for (i = 0; i < ARRAY_SIZE(pss); i++) { + psy = power_supply_get_by_name(pss[i]); + if (!psy) + continue; + + ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE, + &val); + power_supply_put(psy); + + if (!ret && val.intval) { + charger_present = true; + break; + } + } + + if (!charger_present) + goto shutdown; + + /* Check if battery is known */ + psy = power_supply_get_by_name("ab8500_btemp"); + if (psy) { + ret = power_supply_get_property(psy, + POWER_SUPPLY_PROP_TECHNOLOGY, &val); + if (!ret && val.intval != POWER_SUPPLY_TECHNOLOGY_UNKNOWN) { + pr_info("Charger '%s' is connected with known battery", + pss[i]); + pr_info(" - Rebooting.\n"); + machine_restart("charging"); + } + power_supply_put(psy); + } + +shutdown: + sigfillset(&all); + + if (!sigprocmask(SIG_BLOCK, &all, &old)) { + (void)ab8500_sysctrl_set(AB8500_STW4500CTRL1, + AB8500_STW4500CTRL1_SWOFF | + AB8500_STW4500CTRL1_SWRESET4500N); + (void)sigprocmask(SIG_SETMASK, &old, NULL); + } +} + +static inline bool valid_bank(u8 bank) +{ + return ((bank == AB8500_SYS_CTRL1_BLOCK) || + (bank == AB8500_SYS_CTRL2_BLOCK)); +} + +int ab8500_sysctrl_read(u16 reg, u8 *value) +{ + u8 bank; + + if (sysctrl_dev == NULL) + return -EPROBE_DEFER; + + bank = (reg >> 8); + if (!valid_bank(bank)) + return -EINVAL; + + return abx500_get_register_interruptible(sysctrl_dev, bank, + (u8)(reg & 0xFF), value); +} +EXPORT_SYMBOL(ab8500_sysctrl_read); + +int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value) +{ + u8 bank; + + if (sysctrl_dev == NULL) + return -EPROBE_DEFER; + + bank = (reg >> 8); + if (!valid_bank(bank)) { + pr_err("invalid bank\n"); + return -EINVAL; + } + + return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank, + (u8)(reg & 0xFF), mask, value); +} +EXPORT_SYMBOL(ab8500_sysctrl_write); + +static int ab8500_sysctrl_probe(struct platform_device *pdev) +{ + sysctrl_dev = &pdev->dev; + + if (!pm_power_off) + pm_power_off = ab8500_power_off; + + return 0; +} + +static void ab8500_sysctrl_remove(struct platform_device *pdev) +{ + sysctrl_dev = NULL; + + if (pm_power_off == ab8500_power_off) + pm_power_off = NULL; +} + +static const struct of_device_id ab8500_sysctrl_match[] = { + { .compatible = "stericsson,ab8500-sysctrl", }, + {} +}; + +static struct platform_driver ab8500_sysctrl_driver = { + .driver = { + .name = "ab8500-sysctrl", + .of_match_table = ab8500_sysctrl_match, + }, + .probe = ab8500_sysctrl_probe, + .remove = ab8500_sysctrl_remove, +}; + +static int __init ab8500_sysctrl_init(void) +{ + return platform_driver_register(&ab8500_sysctrl_driver); +} +arch_initcall(ab8500_sysctrl_init); -- cgit v1.3.1