From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Cercueil Subject: [PATCH 3/7] watchdog: JZ4740: Register a restart handler Date: Thu, 28 Dec 2017 17:29:35 +0100 Message-ID: <20171228162939.3928-4-paul@crapouillou.net> References: <20171228162939.3928-1-paul@crapouillou.net> Return-path: In-Reply-To: <20171228162939.3928-1-paul@crapouillou.net> Sender: linux-kernel-owner@vger.kernel.org To: Ralf Baechle , Rob Herring , Mark Rutland , Wim Van Sebroeck , Guenter Roeck Cc: devicetree@vger.kernel.org, linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, Paul Cercueil List-Id: devicetree@vger.kernel.org The watchdog driver can restart the system by simply configuring the hardware for a timeout of 0 seconds. Signed-off-by: Paul Cercueil --- drivers/watchdog/jz4740_wdt.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/watchdog/jz4740_wdt.c b/drivers/watchdog/jz4740_wdt.c index 92d6ca8ceb49..fa7f49a3212c 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 -- 2.11.0