Commit e7046df8 authored Jan 07, 2020 by Jack Mitchell Committed by Wim Van Sebroeck Jan 27, 2020

watchdog: dw_wdt: ping watchdog to reset countdown before start

Currently on an rk3288 SoC when trying to use the watchdog the SoC will
instantly reset. This is due to the watchdog countdown counter being set
to its initial value of 0x0. Reset the watchdog counter before start in
order to correctly start the countdown timer from the right position.

Signed-off-by: Jack Mitchell <ml@embed.me.uk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200107155155.278521-1-ml@embed.me.uk

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

parent 69503e58

drivers/watchdog/dw_wdt.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -143,6 +143,7 @@ static int dw_wdt_start(struct watchdog_device *wdd)
		struct dw_wdt *dw_wdt = to_dw_wdt(wdd);

		dw_wdt_set_timeout(wdd, wdd->timeout);
		dw_wdt_ping(&dw_wdt->wdd);
		dw_wdt_arm_system_reset(dw_wdt);

		return 0;