diff options
Diffstat (limited to 'drivers/watchdog/gpio_wdt.c')
| -rw-r--r-- | drivers/watchdog/gpio_wdt.c | 45 |
1 files changed, 17 insertions, 28 deletions
diff --git a/drivers/watchdog/gpio_wdt.c b/drivers/watchdog/gpio_wdt.c index ea77cae03c9d..a7b814ea740b 100644 --- a/drivers/watchdog/gpio_wdt.c +++ b/drivers/watchdog/gpio_wdt.c @@ -1,22 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for watchdog device controlled through GPIO-line * * Author: 2013, Alexander Shiyan <shc_work@mail.ru> - * - * 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. */ -#include <linux/err.h> #include <linux/delay.h> -#include <linux/module.h> +#include <linux/err.h> #include <linux/gpio/consumer.h> -#include <linux/of.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> #include <linux/platform_device.h> +#include <linux/property.h> #include <linux/watchdog.h> +static bool nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, bool, 0); +MODULE_PARM_DESC(nowayout, + "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + #define SOFT_TIMEOUT_MIN 1 #define SOFT_TIMEOUT_DEF 60 @@ -104,7 +107,6 @@ static const struct watchdog_ops gpio_wdt_ops = { static int gpio_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; struct gpio_wdt_priv *priv; enum gpiod_flags gflags; unsigned int hw_margin; @@ -117,7 +119,7 @@ static int gpio_wdt_probe(struct platform_device *pdev) platform_set_drvdata(pdev, priv); - ret = of_property_read_string(np, "hw_algo", &algo); + ret = device_property_read_string(dev, "hw_algo", &algo); if (ret) return ret; if (!strcmp(algo, "toggle")) { @@ -134,16 +136,14 @@ static int gpio_wdt_probe(struct platform_device *pdev) if (IS_ERR(priv->gpiod)) return PTR_ERR(priv->gpiod); - ret = of_property_read_u32(np, - "hw_margin_ms", &hw_margin); + ret = device_property_read_u32(dev, "hw_margin_ms", &hw_margin); if (ret) return ret; /* Disallow values lower than 2 and higher than 65535 ms */ if (hw_margin < 2 || hw_margin > 65535) return -EINVAL; - priv->always_running = of_property_read_bool(np, - "always-running"); + priv->always_running = device_property_read_bool(dev, "always-running"); watchdog_set_drvdata(&priv->wdd, priv); @@ -154,25 +154,15 @@ static int gpio_wdt_probe(struct platform_device *pdev) priv->wdd.parent = dev; priv->wdd.timeout = SOFT_TIMEOUT_DEF; - watchdog_init_timeout(&priv->wdd, 0, &pdev->dev); + watchdog_init_timeout(&priv->wdd, 0, dev); + watchdog_set_nowayout(&priv->wdd, nowayout); watchdog_stop_on_reboot(&priv->wdd); if (priv->always_running) gpio_wdt_start(&priv->wdd); - ret = watchdog_register_device(&priv->wdd); - - return ret; -} - -static int gpio_wdt_remove(struct platform_device *pdev) -{ - struct gpio_wdt_priv *priv = platform_get_drvdata(pdev); - - watchdog_unregister_device(&priv->wdd); - - return 0; + return devm_watchdog_register_device(dev, &priv->wdd); } static const struct of_device_id gpio_wdt_dt_ids[] = { @@ -187,7 +177,6 @@ static struct platform_driver gpio_wdt_driver = { .of_match_table = gpio_wdt_dt_ids, }, .probe = gpio_wdt_probe, - .remove = gpio_wdt_remove, }; #ifdef CONFIG_GPIO_WATCHDOG_ARCH_INITCALL |