watchdog: imx_sc_wdt: Fix reboot on crash

Currently when running the samples/watchdog/watchdog-simple.c
application and forcing a kernel crash by doing:

# ./watchdog-simple &
# echo c > /proc/sysrq-trigger

The system does not reboot as expected.

Fix it by calling imx_sc_wdt_set_timeout() to configure the i.MX8QXP
watchdog with a proper timeout.

Cc: <[email protected]>
Fixes: 986857a ("watchdog: imx_sc: Add i.MX system controller watchdog support")
Reported-by: Breno Lima <[email protected]>
Signed-off-by: Fabio Estevam <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Tested-by: Breno Lima <[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: fabioestevam

drivers/watchdog/imx_sc_wdt.c

@@ -175,6 +175,11 @@ static int imx_sc_wdt_probe(struct platform_device *pdev)
 	wdog->timeout = DEFAULT_TIMEOUT;
 
 	watchdog_init_timeout(wdog, 0, dev);
+
+	ret = imx_sc_wdt_set_timeout(wdog, wdog->timeout);
+	if (ret)
+		return ret;
+
 	watchdog_stop_on_reboot(wdog);
 	watchdog_stop_on_unregister(wdog);