// SPDX-License-Identifier: GPL-2.0 /* * drivers/char/watchdog/davinci_wdt.c * * Watchdog driver for DaVinci DM644x/DM646x processors * * Copyright (C) 2006-2013 Texas Instruments. * * 2007 (c) MontaVista Software, Inc. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/mod_devicetable.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/watchdog.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/device.h> #include <linux/clk.h> #include <linux/err.h> #define MODULE_NAME … #define DEFAULT_HEARTBEAT … #define MAX_HEARTBEAT … /* Timer register set definition */ #define PID12 … #define EMUMGT … #define TIM12 … #define TIM34 … #define PRD12 … #define PRD34 … #define TCR … #define TGCR … #define WDTCR … /* TCR bit definitions */ #define ENAMODE12_DISABLED … #define ENAMODE12_ONESHOT … #define ENAMODE12_PERIODIC … /* TGCR bit definitions */ #define TIM12RS_UNRESET … #define TIM34RS_UNRESET … #define TIMMODE_64BIT_WDOG … /* WDTCR bit definitions */ #define WDEN … #define WDFLAG … #define WDKEY_SEQ0 … #define WDKEY_SEQ1 … static int heartbeat; /* * struct to hold data for each WDT device * @base - base io address of WD device * @clk - source clock of WDT * @wdd - hold watchdog device as is in WDT core */ struct davinci_wdt_device { … }; static int davinci_wdt_start(struct watchdog_device *wdd) { … } static int davinci_wdt_ping(struct watchdog_device *wdd) { … } static unsigned int davinci_wdt_get_timeleft(struct watchdog_device *wdd) { … } static int davinci_wdt_restart(struct watchdog_device *wdd, unsigned long action, void *data) { … } static const struct watchdog_info davinci_wdt_info = …; static const struct watchdog_ops davinci_wdt_ops = …; static int davinci_wdt_probe(struct platform_device *pdev) { … } static const struct of_device_id davinci_wdt_of_match[] = …; MODULE_DEVICE_TABLE(of, davinci_wdt_of_match); static struct platform_driver platform_wdt_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; module_param(heartbeat, int, 0); MODULE_PARM_DESC(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
Codebase Browser
linux