linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 *  Watchdog driver for Broadcom BCM47XX

 *

 *  Copyright (C) 2008 Aleksandar Radovanovic <biblbroks@sezampro.rs>

 *  Copyright (C) 2009 Matthieu CASTET <castet.matthieu@free.fr>

 *  Copyright (C) 2012-2013 Hauke Mehrtens <hauke@hauke-m.de>

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/bcm47xx_wdt.h>

#include <linux/bitops.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/platform_device.h>

#include <linux/types.h>

#include <linux/watchdog.h>

#include <linux/timer.h>

#include <linux/jiffies.h>

​

#define DRV_NAME        "bcm47xx_wdt"

​

#define WDT_DEFAULT_TIME    30  /* seconds */

#define WDT_SOFTTIMER_MAX   255 /* seconds */

#define WDT_SOFTTIMER_THRESHOLD 60  /* seconds */

​

static int timeout = WDT_DEFAULT_TIME;

static bool nowayout = WATCHDOG_NOWAYOUT;

​

module_param(timeout, int, 0);

MODULE_PARM_DESC(timeout, "Watchdog time in seconds. (default="

                __MODULE_STRING(WDT_DEFAULT_TIME) ")");

​

module_param(nowayout, bool, 0);

MODULE_PARM_DESC(nowayout,

        "Watchdog cannot be stopped once started (default="

                __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");

​

static inline struct bcm47xx_wdt *bcm47xx_wdt_get(struct watchdog_device *wdd)

{

    return container_of(wdd, struct bcm47xx_wdt, wdd);

}

​

static int bcm47xx_wdt_hard_keepalive(struct watchdog_device *wdd)

{

    struct bcm47xx_wdt *wdt = bcm47xx_wdt_get(wdd);

​

    wdt->timer_set_ms(wdt, wdd->timeout * 1000);

​

    return 0;

}

​

static int bcm47xx_wdt_hard_start(struct watchdog_device *wdd)

{

    return 0;

}

​

static int bcm47xx_wdt_hard_stop(struct watchdog_device *wdd)

{