Unverified Commit 431cb97b authored by Sebastian Reichel's avatar Sebastian Reichel Committed by Mark Brown
Browse files

regulator: expose regulator_find_closest_bigger 



Expose and document the table lookup logic used by
regulator_set_ramp_delay_regmap, so that it can be
reused for devices that cannot be configured via
regulator_set_ramp_delay_regmap.

Tested-by: Diederik de Haas <didi.debian@cknow.org> # Rock64, Quartz64 Model A + B
Tested-by: Vincent Legoll <vincent.legoll@gmail.com> # Pine64 QuartzPro64
Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230504173618.142075-11-sebastian.reichel@collabora.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 924764aa

drivers/regulator/helpers.c

+18 −4
Original line number Diff line number Diff line
@@ -902,7 +902,20 @@ bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2) 
}

EXPORT_SYMBOL_GPL(regulator_is_equal);



static int find_closest_bigger(unsigned int target, const unsigned int *table,

/**

 * regulator_find_closest_bigger - helper to find offset in ramp delay table

 *

 * @target: targeted ramp_delay

 * @table: table with supported ramp delays

 * @num_sel: number of entries in the table

 * @sel: Pointer to store table offset

 *

 * This is the internal helper used by regulator_set_ramp_delay_regmap to

 * map ramp delay to register value. It should only be used directly if

 * regulator_set_ramp_delay_regmap cannot handle a specific device setup

 * (e.g. because the value is split over multiple registers).

 */

int regulator_find_closest_bigger(unsigned int target, const unsigned int *table,

				  unsigned int num_sel, unsigned int *sel)

{

	unsigned int s, tmp, max, maxsel = 0;
@@ -933,6 +946,7 @@ static int find_closest_bigger(unsigned int target, const unsigned int *table, 


	return 0;

}

EXPORT_SYMBOL_GPL(regulator_find_closest_bigger);



/**

 * regulator_set_ramp_delay_regmap - set_ramp_delay() helper
@@ -951,7 +965,7 @@ int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay) 
	if (WARN_ON(!rdev->desc->n_ramp_values || !rdev->desc->ramp_delay_table))

		return -EINVAL;



	ret = find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table,

	ret = regulator_find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table,

					    rdev->desc->n_ramp_values, &sel);



	if (ret) {

include/linux/regulator/driver.h

+2 −0
Original line number Diff line number Diff line
@@ -758,6 +758,8 @@ int regulator_set_current_limit_regmap(struct regulator_dev *rdev, 
				       int min_uA, int max_uA);

int regulator_get_current_limit_regmap(struct regulator_dev *rdev);

void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);

int regulator_find_closest_bigger(unsigned int target, const unsigned int *table,

				  unsigned int num_sel, unsigned int *sel);

int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay);

int regulator_sync_voltage_rdev(struct regulator_dev *rdev);