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regulator: ltc3589: fix broken voltage transitions

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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 <s.trumtrar@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Steffen Trumtrar 2014-09-25 16:39:11 +02:00 committed by Mark Brown
parent 7d1311b93e
commit c5bb725ac2
1 changed files with 1 additions and 0 deletions
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drivers/regulator/ltc3589.c
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@ -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;