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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>
This commit is contained in:
Jack Mitchell 2020-01-07 15:51:55 +00:00 committed by Wim Van Sebroeck
parent 69503e5851
commit e7046df873
1 changed files with 1 additions and 0 deletions
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drivers/watchdog/dw_wdt.c
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@ -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;