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authorJack Mitchell <ml@embed.me.uk>2020-01-07 15:51:55 +0000
committerWim Van Sebroeck <wim@linux-watchdog.org>2020-01-27 15:55:46 +0100
commite7046df873548bfc87c0c594ca473226c5d3317b (patch)
treef2ad51834ce31d7a6185054ad98660ce69d8b24a /drivers/watchdog
parent69503e585192fdd84b240f18a0873d20e18a2e0a (diff)
downloadlinux-e7046df873548bfc87c0c594ca473226c5d3317b.tar.bz2
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>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/dw_wdt.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
index 738eee5c8751..fba21de2bbad 100644
--- a/drivers/watchdog/dw_wdt.c
+++ b/drivers/watchdog/dw_wdt.c
@@ -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;