From c5bb725ac2d1a13e9e766bf9a16bac986ade17cd Mon Sep 17 00:00:00 2001 From: Steffen Trumtrar Date: Thu, 25 Sep 2014 16:39:11 +0200 Subject: [PATCH] regulator: ltc3589: fix broken voltage transitions VCCR is used as a trigger to start voltage transitions, so we need to mark it volatile in order to make sure it gets written to hardware every time we set a new voltage. Fixes regulator voltage being stuck at the first voltage set after driver load. [lst: reworded commit message] Signed-off-by: Steffen Trumtrar Signed-off-by: Lucas Stach Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/regulator/ltc3589.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/regulator/ltc3589.c b/drivers/regulator/ltc3589.c index c756955bfcc5..0ce8e4e0fa73 100644 --- a/drivers/regulator/ltc3589.c +++ b/drivers/regulator/ltc3589.c @@ -372,6 +372,7 @@ static bool ltc3589_volatile_reg(struct device *dev, unsigned int reg) switch (reg) { case LTC3589_IRQSTAT: case LTC3589_PGSTAT: + case LTC3589_VCCR: return true; } return false; -- 2.20.1