// SPDX-License-Identifier: GPL-2.0 /* * drivers/char/watchdog/pnx4008_wdt.c * * Watchdog driver for PNX4008 board * * Authors: Dmitry Chigirev <[email protected]>, * Vitaly Wool <[email protected]> * Based on sa1100 driver, * Copyright (C) 2000 Oleg Drokin <[email protected]> * * 2005-2006 (c) MontaVista Software, Inc. * * (C) 2012 Wolfram Sang, Pengutronix */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/watchdog.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/spinlock.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/of.h> #include <linux/delay.h> #include <linux/reboot.h> /* WatchDog Timer - Chapter 23 Page 207 */ #define DEFAULT_HEARTBEAT … #define MAX_HEARTBEAT … /* Watchdog timer register set definition */ #define WDTIM_INT(p) … #define WDTIM_CTRL(p) … #define WDTIM_COUNTER(p) … #define WDTIM_MCTRL(p) … #define WDTIM_MATCH0(p) … #define WDTIM_EMR(p) … #define WDTIM_PULSE(p) … #define WDTIM_RES(p) … /* WDTIM_INT bit definitions */ #define MATCH_INT … /* WDTIM_CTRL bit definitions */ #define COUNT_ENAB … #define RESET_COUNT … #define DEBUG_EN … /* WDTIM_MCTRL bit definitions */ #define MR0_INT … #undef RESET_COUNT0 #define RESET_COUNT0 … #define STOP_COUNT0 … #define M_RES1 … #define M_RES2 … #define RESFRC1 … #define RESFRC2 … /* WDTIM_EMR bit definitions */ #define EXT_MATCH0 … #define MATCH_OUTPUT_HIGH … /* WDTIM_RES bit definitions */ #define WDOG_RESET … #define WDOG_COUNTER_RATE … static bool nowayout = … WATCHDOG_NOWAYOUT; static unsigned int heartbeat; static DEFINE_SPINLOCK(io_lock); static void __iomem *wdt_base; static struct clk *wdt_clk; static int pnx4008_wdt_start(struct watchdog_device *wdd) { … } static int pnx4008_wdt_stop(struct watchdog_device *wdd) { … } static int pnx4008_wdt_set_timeout(struct watchdog_device *wdd, unsigned int new_timeout) { … } static int pnx4008_restart_handler(struct watchdog_device *wdd, unsigned long mode, void *cmd) { … } static const struct watchdog_info pnx4008_wdt_ident = …; static const struct watchdog_ops pnx4008_wdt_ops = …; static struct watchdog_device pnx4008_wdd = …; static int pnx4008_wdt_probe(struct platform_device *pdev) { … } #ifdef CONFIG_OF static const struct of_device_id pnx4008_wdt_match[] = …; MODULE_DEVICE_TABLE(of, pnx4008_wdt_match); #endif static struct platform_driver platform_wdt_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; module_param(heartbeat, uint, 0); MODULE_PARM_DESC(…) …; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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