From b4918057f35c5c604325da437db99e70259bd372 Mon Sep 17 00:00:00 2001 From: Paul Cercueil Date: Thu, 10 May 2018 20:47:46 +0200 Subject: watchdog: JZ4740: Register a restart handler The watchdog driver can restart the system by simply configuring the hardware for a timeout of 0 seconds. Signed-off-by: Paul Cercueil Reviewed-by: Guenter Roeck Cc: Wim Van Sebroeck Cc: Mathieu Malaterre Cc: linux-watchdog@vger.kernel.org Cc: linux-mips@linux-mips.org Signed-off-by: James Hogan --- drivers/watchdog/jz4740_wdt.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/watchdog') diff --git a/drivers/watchdog/jz4740_wdt.c b/drivers/watchdog/jz4740_wdt.c index 22136e3522b9..b8b015a7d045 100644 --- a/drivers/watchdog/jz4740_wdt.c +++ b/drivers/watchdog/jz4740_wdt.c @@ -130,6 +130,14 @@ static int jz4740_wdt_stop(struct watchdog_device *wdt_dev) return 0; } +static int jz4740_wdt_restart(struct watchdog_device *wdt_dev, + unsigned long action, void *data) +{ + wdt_dev->timeout = 0; + jz4740_wdt_start(wdt_dev); + return 0; +} + static const struct watchdog_info jz4740_wdt_info = { .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .identity = "jz4740 Watchdog", @@ -141,6 +149,7 @@ static const struct watchdog_ops jz4740_wdt_ops = { .stop = jz4740_wdt_stop, .ping = jz4740_wdt_ping, .set_timeout = jz4740_wdt_set_timeout, + .restart = jz4740_wdt_restart, }; #ifdef CONFIG_OF -- cgit v1.2.3-59-g8ed1b