| .. | .. |
|---|
| 1 | +// SPDX-License-Identifier: GPL-2.0-or-later |
|---|
| 1 | 2 | /* |
|---|
| 2 | 3 | * Driver for watchdog device controlled through GPIO-line |
|---|
| 3 | 4 | * |
|---|
| 4 | 5 | * Author: 2013, Alexander Shiyan <shc_work@mail.ru> |
|---|
| 5 | | - * |
|---|
| 6 | | - * This program is free software; you can redistribute it and/or modify |
|---|
| 7 | | - * it under the terms of the GNU General Public License as published by |
|---|
| 8 | | - * the Free Software Foundation; either version 2 of the License, or |
|---|
| 9 | | - * (at your option) any later version. |
|---|
| 10 | 6 | */ |
|---|
| 11 | 7 | |
|---|
| 12 | 8 | #include <linux/err.h> |
|---|
| .. | .. |
|---|
| 16 | 12 | #include <linux/of.h> |
|---|
| 17 | 13 | #include <linux/platform_device.h> |
|---|
| 18 | 14 | #include <linux/watchdog.h> |
|---|
| 15 | + |
|---|
| 16 | +static bool nowayout = WATCHDOG_NOWAYOUT; |
|---|
| 17 | +module_param(nowayout, bool, 0); |
|---|
| 18 | +MODULE_PARM_DESC(nowayout, |
|---|
| 19 | + "Watchdog cannot be stopped once started (default=" |
|---|
| 20 | + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); |
|---|
| 19 | 21 | |
|---|
| 20 | 22 | #define SOFT_TIMEOUT_MIN 1 |
|---|
| 21 | 23 | #define SOFT_TIMEOUT_DEF 60 |
|---|
| .. | .. |
|---|
| 154 | 156 | priv->wdd.parent = dev; |
|---|
| 155 | 157 | priv->wdd.timeout = SOFT_TIMEOUT_DEF; |
|---|
| 156 | 158 | |
|---|
| 157 | | - watchdog_init_timeout(&priv->wdd, 0, &pdev->dev); |
|---|
| 159 | + watchdog_init_timeout(&priv->wdd, 0, dev); |
|---|
| 160 | + watchdog_set_nowayout(&priv->wdd, nowayout); |
|---|
| 158 | 161 | |
|---|
| 159 | 162 | watchdog_stop_on_reboot(&priv->wdd); |
|---|
| 160 | 163 | |
|---|
| 161 | 164 | if (priv->always_running) |
|---|
| 162 | 165 | gpio_wdt_start(&priv->wdd); |
|---|
| 163 | 166 | |
|---|
| 164 | | - ret = watchdog_register_device(&priv->wdd); |
|---|
| 165 | | - |
|---|
| 166 | | - return ret; |
|---|
| 167 | | -} |
|---|
| 168 | | - |
|---|
| 169 | | -static int gpio_wdt_remove(struct platform_device *pdev) |
|---|
| 170 | | -{ |
|---|
| 171 | | - struct gpio_wdt_priv *priv = platform_get_drvdata(pdev); |
|---|
| 172 | | - |
|---|
| 173 | | - watchdog_unregister_device(&priv->wdd); |
|---|
| 174 | | - |
|---|
| 175 | | - return 0; |
|---|
| 167 | + return devm_watchdog_register_device(dev, &priv->wdd); |
|---|
| 176 | 168 | } |
|---|
| 177 | 169 | |
|---|
| 178 | 170 | static const struct of_device_id gpio_wdt_dt_ids[] = { |
|---|
| .. | .. |
|---|
| 187 | 179 | .of_match_table = gpio_wdt_dt_ids, |
|---|
| 188 | 180 | }, |
|---|
| 189 | 181 | .probe = gpio_wdt_probe, |
|---|
| 190 | | - .remove = gpio_wdt_remove, |
|---|
| 191 | 182 | }; |
|---|
| 192 | 183 | |
|---|
| 193 | 184 | #ifdef CONFIG_GPIO_WATCHDOG_ARCH_INITCALL |
|---|