Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751024AbdL3Nvh (ORCPT ); Sat, 30 Dec 2017 08:51:37 -0500 Received: from outils.crapouillou.net ([89.234.176.41]:35552 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750962AbdL3Nve (ORCPT ); Sat, 30 Dec 2017 08:51:34 -0500 From: Paul Cercueil 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 Subject: [PATCH v2 3/8] watchdog: JZ4740: Register a restart handler Date: Sat, 30 Dec 2017 14:51:03 +0100 Message-Id: <20171230135108.6834-3-paul@crapouillou.net> In-Reply-To: <20171230135108.6834-1-paul@crapouillou.net> References: <20171228162939.3928-2-paul@crapouillou.net> <20171230135108.6834-1-paul@crapouillou.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1167 Lines: 40 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 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