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regulator: core: Use list_voltage() to read single voltage regulators

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If the regulator doesn't supply a way of reading back the voltage but does
provide a list_voltage() operation then use that with a selector of zero
to read the voltage.  Regulators doing this means that we have the list
operation there for consumers that want to configure themselves.

Reported-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-08-09 16:42:19 +01:00
parent 215b8b055d
commit f7df20ec32
1 changed files with 2 additions and 0 deletions
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2
drivers/regulator/core.c
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@ -2395,6 +2395,8 @@ static int _regulator_get_voltage(struct regulator_dev *rdev)
ret = rdev->desc->ops->list_voltage(rdev, sel);
} else if (rdev->desc->ops->get_voltage) {
ret = rdev->desc->ops->get_voltage(rdev);
} else if (rdev->desc->ops->list_voltage) {
ret = rdev->desc->ops->list_voltage(rdev, 0);
} else {
return -EINVAL;
}