Unverified Commit 6a47b4da authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Mark Brown
Browse files

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>
Tested-by: default avatarAngus Ainslie <angus@akkea.ca>
Reviewed-by: default avatarAngus Ainslie <angus@akkea.ca>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f43d1b38

drivers/regulator/helpers.c

+29 −10
Original line number Diff line number Diff line
@@ -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,

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);



/**

include/linux/regulator/driver.h

+6 −0
Original line number Diff line number Diff line
@@ -539,4 +539,10 @@ 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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