watchdog: da9062: Disable and wait before changing timeout
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Web: https://git.kernel.org/torvalds/c/f31b2a9bdeaea38957f4675ee0d1b8421595dc67 Commit: f31b2a9bdeaea38957f4675ee0d1b8421595dc67 Parent: 540f635192bb222f252724f70b9240d17742f1b1 Refname: refs/heads/master Author: Michael Grzeschik <[email protected]> AuthorDate: Tue Oct 17 17:30:25 2017 +0200 Committer: Wim Van Sebroeck <[email protected]> CommitDate: Thu Dec 28 20:45:07 2017 +0100 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: Michael Grzeschik <[email protected]> Reviewed-by: Guenter Roeck <[email protected]> Signed-off-by: Guenter Roeck <[email protected]> Signed-off-by: Wim Van Sebroeck <[email protected]> --- drivers/watchdog/da9062_wdt.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c index 4349a0221548..dbb970e87d3d 100644 --- a/drivers/watchdog/da9062_wdt.c +++ b/drivers/watchdog/da9062_wdt.c @@ -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, -- To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html