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watchdog: JZ4740: Register a restart handler

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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>
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>
Cc: Mathieu Malaterre <malat@debian.org>
Cc: linux-watchdog@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: James Hogan <jhogan@kernel.org>
This commit is contained in:
Paul Cercueil 2018-05-10 20:47:46 +02:00 • committed by James Hogan
parent 6bdbc1f7f6
commit b4918057f3
No known key found for this signature in database
GPG key ID: 35CEE4862B1023F2
1 changed files with 9 additions and 0 deletions
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9
drivers/watchdog/jz4740_wdt.c
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@ -130,6 +130,14 @@ static int jz4740_wdt_stop(struct watchdog_device *wdt_dev)
return 0; 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 = { static const struct watchdog_info jz4740_wdt_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
.identity = "jz4740 Watchdog", .identity = "jz4740 Watchdog",
@ -141,6 +149,7 @@ static const struct watchdog_ops jz4740_wdt_ops = {
.stop = jz4740_wdt_stop, .stop = jz4740_wdt_stop,
.ping = jz4740_wdt_ping, .ping = jz4740_wdt_ping,
.set_timeout = jz4740_wdt_set_timeout, .set_timeout = jz4740_wdt_set_timeout,
.restart = jz4740_wdt_restart,
}; };
#ifdef CONFIG_OF #ifdef CONFIG_OF