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Commit f31b2a9b authored by Michael Grzeschik's avatar Michael Grzeschik Committed by Wim Van Sebroeck
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watchdog: da9062: Disable and wait before changing timeout 



The DA9062 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: default avatarMichael Grzeschik <m.grzeschik@pengutronix.de>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 540f6351

drivers/watchdog/da9062_wdt.c

+7 −0
Original line number Diff line number Diff line
@@ -100,6 +100,13 @@ static int da9062_wdt_update_timeout_register(struct da9062_watchdog *wdt, 
	if (ret)

		return ret;



	regmap_update_bits(chip->regmap,

				  DA9062AA_CONTROL_D,

				  DA9062AA_TWDSCALE_MASK,

				  DA9062_TWDSCALE_DISABLE);



	usleep_range(150, 300);



	return regmap_update_bits(chip->regmap,

				  DA9062AA_CONTROL_D,

				  DA9062AA_TWDSCALE_MASK,