Commit ae0b7c33 authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Angus Ainslie

regulator: add regulator_desc_list_voltage_linear_range

Add regulator_desc_list_voltage_linear_range which can be used
by drivers for getting the voltages before regulator is registered.
This may be useful for drivers which need to fetch the voltage
selectors at device-tree parsing callback.
Signed-off-by: default avatarMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: default avatarMark Brown <broonie@kernel.org>
parent debdf98c
......@@ -594,28 +594,30 @@ int regulator_list_voltage_pickable_linear_range(struct regulator_dev *rdev,
EXPORT_SYMBOL_GPL(regulator_list_voltage_pickable_linear_range);
/**
* regulator_list_voltage_linear_range - List voltages for linear ranges
* regulator_desc_list_voltage_linear_range - List voltages for linear ranges
*
* @rdev: Regulator device
* @desc: Regulator desc for regulator which volatges are to be listed
* @selector: Selector to convert into a voltage
*
* Regulators with a series of simple linear mappings between voltages
* and selectors can set linear_ranges in the regulator descriptor and
* then use this function as their list_voltage() operation,
* and selectors who have set linear_ranges in the regulator descriptor
* can use this function prior regulator registration to list voltages.
* This is useful when voltages need to be listed during device-tree
* parsing.
*/
int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
unsigned int selector)
int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
unsigned int selector)
{
const struct regulator_linear_range *range;
int i;
if (!rdev->desc->n_linear_ranges) {
BUG_ON(!rdev->desc->n_linear_ranges);
if (!desc->n_linear_ranges) {
BUG_ON(!desc->n_linear_ranges);
return -EINVAL;
}
for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
range = &rdev->desc->linear_ranges[i];
for (i = 0; i < desc->n_linear_ranges; i++) {
range = &desc->linear_ranges[i];
if (!(selector >= range->min_sel &&
selector <= range->max_sel))
......@@ -628,6 +630,23 @@ int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
return -EINVAL;
}
EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear_range);
/**
* regulator_list_voltage_linear_range - List voltages for linear ranges
*
* @rdev: Regulator device
* @selector: Selector to convert into a voltage
*
* Regulators with a series of simple linear mappings between voltages
* and selectors can set linear_ranges in the regulator descriptor and
* then use this function as their list_voltage() operation,
*/
int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
unsigned int selector)
{
return regulator_desc_list_voltage_linear_range(rdev->desc, selector);
}
EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
/**
......
......@@ -548,4 +548,10 @@ void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
void regulator_lock(struct regulator_dev *rdev);
void regulator_unlock(struct regulator_dev *rdev);
/*
* Helper functions intended to be used by regulator drivers prior registering
* their regulators.
*/
int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
unsigned int selector);
#endif
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