From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751961AbeEJSs3 (ORCPT ); Thu, 10 May 2018 14:48:29 -0400 Received: from outils.crapouillou.net ([89.234.176.41]:55632 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750972AbeEJSsW (ORCPT ); Thu, 10 May 2018 14:48:22 -0400 From: Paul Cercueil To: Guenter Roeck , Rob Herring , Mark Rutland , Ralf Baechle , James Hogan Cc: Wim Van Sebroeck , Mathieu Malaterre , linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, Paul Cercueil Subject: [PATCH v3 3/8] watchdog: JZ4740: Register a restart handler Date: Thu, 10 May 2018 20:47:46 +0200 Message-Id: <20180510184751.13416-3-paul@crapouillou.net> In-Reply-To: <20180510184751.13416-1-paul@crapouillou.net> References: <20180510184751.13416-1-paul@crapouillou.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@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 Reviewed-by: Guenter Roeck --- drivers/watchdog/jz4740_wdt.c | 9 +++++++++ 1 file changed, 9 insertions(+) v2: No change v3: No change 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 -- 2.11.0