// SPDX-License-Identifier: GPL-2.0 /* * omap_wdt.c * * Watchdog driver for the TI OMAP 16xx & 24xx/34xx 32KHz (non-secure) watchdog * * Author: MontaVista Software, Inc. * <[email protected]> or <[email protected]> * * 2003 (c) MontaVista Software, Inc. * * History: * * 20030527: George G. Davis <[email protected]> * Initially based on linux-2.4.19-rmk7-pxa1/drivers/char/sa1100_wdt.c * (c) Copyright 2000 Oleg Drokin <[email protected]> * Based on SoftDog driver by Alan Cox <[email protected]> * * Copyright (c) 2004 Texas Instruments. * 1. Modified to support OMAP1610 32-KHz watchdog timer * 2. Ported to 2.6 kernel * * Copyright (c) 2005 David Brownell * Use the driver model and standard identifiers; handle bigger timeouts. */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/watchdog.h> #include <linux/reboot.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/moduleparam.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/pm_runtime.h> #include <linux/platform_data/omap-wd-timer.h> #include "omap_wdt.h" static bool nowayout = … WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; static unsigned timer_margin; module_param(timer_margin, uint, 0); MODULE_PARM_DESC(…) …; #define to_omap_wdt_dev(_wdog) … static bool early_enable; module_param(early_enable, bool, 0); MODULE_PARM_DESC(…) …; struct omap_wdt_dev { … }; static void omap_wdt_reload(struct omap_wdt_dev *wdev) { … } static void omap_wdt_enable(struct omap_wdt_dev *wdev) { … } static void omap_wdt_disable(struct omap_wdt_dev *wdev) { … } static void omap_wdt_set_timer(struct omap_wdt_dev *wdev, unsigned int timeout) { … } static int omap_wdt_start(struct watchdog_device *wdog) { … } static int omap_wdt_stop(struct watchdog_device *wdog) { … } static int omap_wdt_ping(struct watchdog_device *wdog) { … } static int omap_wdt_set_timeout(struct watchdog_device *wdog, unsigned int timeout) { … } static unsigned int omap_wdt_get_timeleft(struct watchdog_device *wdog) { … } static const struct watchdog_info omap_wdt_info = …; static const struct watchdog_ops omap_wdt_ops = …; static int omap_wdt_probe(struct platform_device *pdev) { … } static void omap_wdt_shutdown(struct platform_device *pdev) { … } static void omap_wdt_remove(struct platform_device *pdev) { … } /* REVISIT ... not clear this is the best way to handle system suspend; and * it's very inappropriate for selective device suspend (e.g. suspending this * through sysfs rather than by stopping the watchdog daemon). Also, this * may not play well enough with NOWAYOUT... */ static int omap_wdt_suspend(struct platform_device *pdev, pm_message_t state) { … } static int omap_wdt_resume(struct platform_device *pdev) { … } static const struct of_device_id omap_wdt_of_match[] = …; MODULE_DEVICE_TABLE(of, omap_wdt_of_match); static struct platform_driver omap_wdt_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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