diff options
Diffstat (limited to 'drivers/power/reset/ltc2952-poweroff.c')
| -rw-r--r-- | drivers/power/reset/ltc2952-poweroff.c | 42 |
1 files changed, 18 insertions, 24 deletions
diff --git a/drivers/power/reset/ltc2952-poweroff.c b/drivers/power/reset/ltc2952-poweroff.c index c484584745bc..90c664d344d0 100644 --- a/drivers/power/reset/ltc2952-poweroff.c +++ b/drivers/power/reset/ltc2952-poweroff.c @@ -1,19 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * LTC2952 (PowerPath) driver * * Copyright (C) 2014, Xsens Technologies BV <info@xsens.com> * Maintainer: René Moll <linux@r-moll.nl> * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * * ---------------------------------------- * - Description * ---------------------------------------- @@ -50,7 +41,6 @@ * * The driver requires a non-shared, edge-triggered interrupt on the trigger * GPIO. - * */ #include <linux/kernel.h> @@ -62,9 +52,11 @@ #include <linux/slab.h> #include <linux/kmod.h> #include <linux/module.h> +#include <linux/panic_notifier.h> #include <linux/mod_devicetable.h> #include <linux/gpio/consumer.h> #include <linux/reboot.h> +#include <linux/property.h> struct ltc2952_poweroff { struct hrtimer timer_trigger; @@ -102,9 +94,7 @@ static struct ltc2952_poweroff *ltc2952_data; */ static enum hrtimer_restart ltc2952_poweroff_timer_wde(struct hrtimer *timer) { - ktime_t now; int state; - unsigned long overruns; struct ltc2952_poweroff *data = to_ltc2952(timer, timer_wde); if (data->kernel_panic) @@ -113,8 +103,7 @@ static enum hrtimer_restart ltc2952_poweroff_timer_wde(struct hrtimer *timer) state = gpiod_get_value(data->gpio_watchdog); gpiod_set_value(data->gpio_watchdog, !state); - now = hrtimer_cb_get_time(timer); - overruns = hrtimer_forward(timer, now, data->wde_interval); + hrtimer_forward_now(timer, data->wde_interval); return HRTIMER_RESTART; } @@ -170,23 +159,30 @@ static void ltc2952_poweroff_kill(void) static void ltc2952_poweroff_default(struct ltc2952_poweroff *data) { - data->wde_interval = 300L * 1E6L; - data->trigger_delay = ktime_set(2, 500L*1E6L); + data->wde_interval = 300L * NSEC_PER_MSEC; + data->trigger_delay = ktime_set(2, 500L * NSEC_PER_MSEC); - hrtimer_init(&data->timer_trigger, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - data->timer_trigger.function = ltc2952_poweroff_timer_trigger; + hrtimer_setup(&data->timer_trigger, ltc2952_poweroff_timer_trigger, CLOCK_MONOTONIC, + HRTIMER_MODE_REL); - hrtimer_init(&data->timer_wde, CLOCK_MONOTONIC, HRTIMER_MODE_REL); - data->timer_wde.function = ltc2952_poweroff_timer_wde; + hrtimer_setup(&data->timer_wde, ltc2952_poweroff_timer_wde, CLOCK_MONOTONIC, + HRTIMER_MODE_REL); } static int ltc2952_poweroff_init(struct platform_device *pdev) { int ret; + u32 trigger_delay_ms; struct ltc2952_poweroff *data = platform_get_drvdata(pdev); ltc2952_poweroff_default(data); + if (!device_property_read_u32(&pdev->dev, "trigger-delay-ms", + &trigger_delay_ms)) { + data->trigger_delay = ktime_set(trigger_delay_ms / MSEC_PER_SEC, + (trigger_delay_ms % MSEC_PER_SEC) * NSEC_PER_MSEC); + } + data->gpio_watchdog = devm_gpiod_get(&pdev->dev, "watchdog", GPIOD_OUT_LOW); if (IS_ERR(data->gpio_watchdog)) { @@ -290,7 +286,7 @@ static int ltc2952_poweroff_probe(struct platform_device *pdev) return 0; } -static int ltc2952_poweroff_remove(struct platform_device *pdev) +static void ltc2952_poweroff_remove(struct platform_device *pdev) { struct ltc2952_poweroff *data = platform_get_drvdata(pdev); @@ -299,7 +295,6 @@ static int ltc2952_poweroff_remove(struct platform_device *pdev) hrtimer_cancel(&data->timer_wde); atomic_notifier_chain_unregister(&panic_notifier_list, &data->panic_notifier); - return 0; } static const struct of_device_id of_ltc2952_poweroff_match[] = { @@ -321,4 +316,3 @@ module_platform_driver(ltc2952_poweroff_driver); MODULE_AUTHOR("René Moll <rene.moll@xsens.com>"); MODULE_DESCRIPTION("LTC PowerPath power-off driver"); -MODULE_LICENSE("GPL v2"); |