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regulator: core: Only propagate voltage changes to if it can change voltages 

When we are propagating voltage changes to parent regulators don't
bother if the parent does not have permission to change voltages.  This
simplifies error checking in the function for cases where the regulator
lacks some of the voltage operations.

Reported-by: Dong Aisheng <aisheng.dong@nxp.com>
Tested-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2017-04-13 18:36:59 +01:00
parent fd08604555
commit 43fc99f293
1 changed files with 4 additions and 2 deletions
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6
drivers/regulator/core.c
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@ -2939,8 +2939,10 @@ static int regulator_set_voltage_unlocked(struct regulator *regulator,
if (ret < 0)
goto out2;
if (rdev->supply && (rdev->desc->min_dropout_uV ||
!rdev->desc->ops->get_voltage)) {
if (rdev->supply &&
regulator_ops_is_valid(rdev->supply->rdev,
REGULATOR_CHANGE_VOLTAGE) &&
(rdev->desc->min_dropout_uV || !rdev->desc->ops->get_voltage)) {
int current_supply_uV;
int selector;