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3208bcef36
The sysctrl driver was looking for an instance of the PM2301 charger but this has been deleted from the kernel and is not used with the U8500 systems any more. Drop the string. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20231214-ab8500-sysctrl-oneliner-v1-1-fd78a15c0b2f@linaro.org Signed-off-by: Lee Jones <lee@kernel.org>
169 lines
3.6 KiB
C
169 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* AB8500 system control driver
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*
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* Copyright (C) ST-Ericsson SA 2010
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* Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson.
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*/
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/reboot.h>
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#include <linux/signal.h>
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#include <linux/power_supply.h>
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#include <linux/mfd/abx500.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/mfd/abx500/ab8500-sysctrl.h>
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/* RtcCtrl bits */
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#define AB8500_ALARM_MIN_LOW 0x08
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#define AB8500_ALARM_MIN_MID 0x09
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#define RTC_CTRL 0x0B
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#define RTC_ALARM_ENABLE 0x4
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static struct device *sysctrl_dev;
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static void ab8500_power_off(void)
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{
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sigset_t old;
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sigset_t all;
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static const char * const pss[] = {"ab8500_ac", "ab8500_usb"};
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int i;
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bool charger_present = false;
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union power_supply_propval val;
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struct power_supply *psy;
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int ret;
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if (sysctrl_dev == NULL) {
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pr_err("%s: sysctrl not initialized\n", __func__);
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return;
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}
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/*
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* If we have a charger connected and we're powering off,
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* reboot into charge-only mode.
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*/
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for (i = 0; i < ARRAY_SIZE(pss); i++) {
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psy = power_supply_get_by_name(pss[i]);
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if (!psy)
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continue;
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ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_ONLINE,
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&val);
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power_supply_put(psy);
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if (!ret && val.intval) {
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charger_present = true;
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break;
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}
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}
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if (!charger_present)
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goto shutdown;
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/* Check if battery is known */
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psy = power_supply_get_by_name("ab8500_btemp");
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if (psy) {
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ret = power_supply_get_property(psy,
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POWER_SUPPLY_PROP_TECHNOLOGY, &val);
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if (!ret && val.intval != POWER_SUPPLY_TECHNOLOGY_UNKNOWN) {
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pr_info("Charger '%s' is connected with known battery",
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pss[i]);
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pr_info(" - Rebooting.\n");
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machine_restart("charging");
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}
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power_supply_put(psy);
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}
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shutdown:
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sigfillset(&all);
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if (!sigprocmask(SIG_BLOCK, &all, &old)) {
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(void)ab8500_sysctrl_set(AB8500_STW4500CTRL1,
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AB8500_STW4500CTRL1_SWOFF |
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AB8500_STW4500CTRL1_SWRESET4500N);
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(void)sigprocmask(SIG_SETMASK, &old, NULL);
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}
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}
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static inline bool valid_bank(u8 bank)
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{
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return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
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(bank == AB8500_SYS_CTRL2_BLOCK));
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}
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int ab8500_sysctrl_read(u16 reg, u8 *value)
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{
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u8 bank;
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if (sysctrl_dev == NULL)
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return -EPROBE_DEFER;
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bank = (reg >> 8);
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if (!valid_bank(bank))
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return -EINVAL;
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return abx500_get_register_interruptible(sysctrl_dev, bank,
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(u8)(reg & 0xFF), value);
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}
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EXPORT_SYMBOL(ab8500_sysctrl_read);
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int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
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{
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u8 bank;
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if (sysctrl_dev == NULL)
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return -EPROBE_DEFER;
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bank = (reg >> 8);
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if (!valid_bank(bank)) {
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pr_err("invalid bank\n");
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return -EINVAL;
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}
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return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
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(u8)(reg & 0xFF), mask, value);
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}
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EXPORT_SYMBOL(ab8500_sysctrl_write);
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static int ab8500_sysctrl_probe(struct platform_device *pdev)
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{
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sysctrl_dev = &pdev->dev;
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if (!pm_power_off)
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pm_power_off = ab8500_power_off;
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return 0;
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}
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static void ab8500_sysctrl_remove(struct platform_device *pdev)
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{
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sysctrl_dev = NULL;
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if (pm_power_off == ab8500_power_off)
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pm_power_off = NULL;
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}
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static const struct of_device_id ab8500_sysctrl_match[] = {
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{ .compatible = "stericsson,ab8500-sysctrl", },
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{}
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};
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static struct platform_driver ab8500_sysctrl_driver = {
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.driver = {
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.name = "ab8500-sysctrl",
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.of_match_table = ab8500_sysctrl_match,
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},
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.probe = ab8500_sysctrl_probe,
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.remove_new = ab8500_sysctrl_remove,
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};
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static int __init ab8500_sysctrl_init(void)
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{
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return platform_driver_register(&ab8500_sysctrl_driver);
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}
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arch_initcall(ab8500_sysctrl_init);
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