The DA9063 watchdog occasionally enters error condition and resets the system if the timeout is changed quickly after the timer was enabled. The method of disabling and waiting for > 150 µs before setting the new timeout is taken from the DA9052 driver. Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> --- drivers/watchdog/da9063_wdt.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/watchdog/da9063_wdt.c b/drivers/watchdog/da9063_wdt.c index b2e9201..87e14d8 100644 --- a/drivers/watchdog/da9063_wdt.c +++ b/drivers/watchdog/da9063_wdt.c @@ -67,6 +67,11 @@ static int _da9063_wdt_set_timeout(struct da9063_watchdog *wdt, mutex_lock(&wdt->mutex); ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D, + DA9063_TWDSCALE_MASK, DA9063_TWDSCALE_DISABLE); + + usleep_range(150, 300); + + ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D, DA9063_TWDSCALE_MASK, regval); wdt->defer_ping = false; -- 2.4.6 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
