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From: Paul Cercueil <paul@crapouillou.net>
To: Guenter Roeck <linux@roeck-us.net>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Ralf Baechle <ralf@linux-mips.org>,
	James Hogan <jhogan@kernel.org>
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>,
	Mathieu Malaterre <malat@debian.org>,
	linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-mips@linux-mips.org,
	Paul Cercueil <paul@crapouillou.net>
Subject: [PATCH v3 3/8] watchdog: JZ4740: Register a restart handler
Date: Thu, 10 May 2018 20:47:46 +0200	[thread overview]
Message-ID: <20180510184751.13416-3-paul@crapouillou.net> (raw)
In-Reply-To: <20180510184751.13416-1-paul@crapouillou.net>

The watchdog driver can restart the system by simply configuring the
hardware for a timeout of 0 seconds.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
 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

  parent reply	other threads:[~2018-05-10 18:48 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-10 18:47 [PATCH v3 1/8] watchdog: JZ4740: Disable clock after stopping counter Paul Cercueil
2018-05-10 18:47 ` [PATCH v3 2/8] watchdog: jz4740: Use devm_* functions Paul Cercueil
2018-05-10 18:47 ` Paul Cercueil [this message]
2018-05-10 18:47 ` [PATCH v3 4/8] watchdog: JZ4740: Drop module remove function Paul Cercueil
2018-05-10 18:47 ` [PATCH v3 5/8] MIPS: jz4740: dts: Add bindings for the jz4740-wdt driver Paul Cercueil
2018-05-11 14:52   ` James Hogan
2018-05-10 18:47 ` [PATCH v3 6/8] MIPS: jz4780: dts: Fix watchdog node Paul Cercueil
2018-05-18 21:31   ` Rob Herring
2018-05-10 18:47 ` [PATCH v3 7/8] MIPS: qi_lb60: Enable the jz4740-wdt driver Paul Cercueil
2018-05-10 18:47 ` [PATCH v3 8/8] MIPS: jz4740: Drop old platform reset code Paul Cercueil

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