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regulator: core: create unlocked version of regulator_list_voltage 

The unlocked version will be needed when we start propagating voltage
changes to the supply regulators.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Sascha Hauer 2015-09-30 16:05:43 +02:00 committed by Mark Brown
parent 9f01cd4a91
commit 3a40cfc36b
1 changed files with 35 additions and 27 deletions
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62
drivers/regulator/core.c
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@ -2348,6 +2348,40 @@ static int _regulator_is_enabled(struct regulator_dev *rdev)
return rdev->desc->ops->is_enabled(rdev);
}
static int _regulator_list_voltage(struct regulator *regulator,
unsigned selector, int lock)
{
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
if (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1 && !selector)
return rdev->desc->fixed_uV;
if (ops->list_voltage) {
if (selector >= rdev->desc->n_voltages)
return -EINVAL;
if (lock)
mutex_lock(&rdev->mutex);
ret = ops->list_voltage(rdev, selector);
if (lock)
mutex_unlock(&rdev->mutex);
} else if (rdev->supply) {
ret = _regulator_list_voltage(rdev->supply, selector, lock);
} else {
return -EINVAL;
}
if (ret > 0) {
if (ret < rdev->constraints->min_uV)
ret = 0;
else if (ret > rdev->constraints->max_uV)
ret = 0;
}
return ret;
}
/**
* regulator_is_enabled - is the regulator output enabled
* @regulator: regulator source
@ -2437,33 +2471,7 @@ EXPORT_SYMBOL_GPL(regulator_count_voltages);
*/
int regulator_list_voltage(struct regulator *regulator, unsigned selector)
{
struct regulator_dev *rdev = regulator->rdev;
const struct regulator_ops *ops = rdev->desc->ops;
int ret;
if (rdev->desc->fixed_uV && rdev->desc->n_voltages == 1 && !selector)
return rdev->desc->fixed_uV;
if (ops->list_voltage) {
if (selector >= rdev->desc->n_voltages)
return -EINVAL;
mutex_lock(&rdev->mutex);
ret = ops->list_voltage(rdev, selector);
mutex_unlock(&rdev->mutex);
} else if (rdev->supply) {
ret = regulator_list_voltage(rdev->supply, selector);
} else {
return -EINVAL;
}
if (ret > 0) {
if (ret < rdev->constraints->min_uV)
ret = 0;
else if (ret > rdev->constraints->max_uV)
ret = 0;
}
return ret;
return _regulator_list_voltage(regulator, selector, 1);
}
EXPORT_SYMBOL_GPL(regulator_list_voltage);