watchdog: da9052_wdt: add support for nowayout

Add nowayout module parameter for not stopping the
watchdog when userspace application quits.

Signed-off-by: Marcus Folkesson <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: marcusfolkesson

drivers/watchdog/da9052_wdt.c

@@ -30,6 +30,12 @@ struct da9052_wdt_data {
 	unsigned long jpast;
 };
 
+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) ")");
+
 static const struct {
 	u8 reg_val;
 	int time;  /* Seconds */
@@ -172,6 +178,7 @@ static int da9052_wdt_probe(struct platform_device *pdev)
 	da9052_wdt->ops = &da9052_wdt_ops;
 	da9052_wdt->parent = dev;
 	watchdog_set_drvdata(da9052_wdt, driver_data);
+	watchdog_set_nowayout(da9052_wdt, nowayout);
 
 	if (da9052->fault_log & DA9052_FAULTLOG_TWDERROR)
 		da9052_wdt->bootstatus |= WDIOF_CARDRESET;