watchdog: gpio: add support for nowayout option

Add support for the nowayout option in the gpio watchdog driver.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/gpio_wdt.c

@@ -13,6 +13,12 @@
 #include <linux/platform_device.h>
 #include <linux/watchdog.h>
 
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
+MODULE_PARM_DESC(nowayout,
+		"Watchdog cannot be stopped once started (default="
+				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
 #define SOFT_TIMEOUT_MIN	1
 #define SOFT_TIMEOUT_DEF	60
 
@@ -151,6 +157,7 @@ static int gpio_wdt_probe(struct platform_device *pdev)
 	priv->wdd.timeout	= SOFT_TIMEOUT_DEF;
 
 	watchdog_init_timeout(&priv->wdd, 0, dev);
+	watchdog_set_nowayout(&priv->wdd, nowayout);
 
 	watchdog_stop_on_reboot(&priv->wdd);