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Commit 88cd222b authored by Linus Walleij's avatar Linus Walleij Committed by Liam Girdwood
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regulator: provide consumer interface for fall/rise time 



This exposes the functionality for rise/fall fime when setting
voltage to the consumers.

Cc: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Acked-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 77af1b26

drivers/regulator/core.c

+45 −0
Original line number Diff line number Diff line
@@ -1764,6 +1764,51 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 
}

EXPORT_SYMBOL_GPL(regulator_set_voltage);



/**

 * regulator_set_voltage_time - get raise/fall time

 * @regulator: regulator source

 * @old_uV: starting voltage in microvolts

 * @new_uV: target voltage in microvolts

 *

 * Provided with the starting and ending voltage, this function attempts to

 * calculate the time in microseconds required to rise or fall to this new

 * voltage.

 */

int regulator_set_voltage_time(struct regulator *regulator,

			       int old_uV, int new_uV)

{

	struct regulator_dev	*rdev = regulator->rdev;

	struct regulator_ops	*ops = rdev->desc->ops;

	int old_sel = -1;

	int new_sel = -1;

	int voltage;

	int i;



	/* Currently requires operations to do this */

	if (!ops->list_voltage || !ops->set_voltage_time_sel

	    || !rdev->desc->n_voltages)

		return -EINVAL;



	for (i = 0; i < rdev->desc->n_voltages; i++) {

		/* We only look for exact voltage matches here */

		voltage = regulator_list_voltage(regulator, i);

		if (voltage < 0)

			return -EINVAL;

		if (voltage == 0)

			continue;

		if (voltage == old_uV)

			old_sel = i;

		if (voltage == new_uV)

			new_sel = i;

	}



	if (old_sel < 0 || new_sel < 0)

		return -EINVAL;



	return ops->set_voltage_time_sel(rdev, old_sel, new_sel);

}

EXPORT_SYMBOL_GPL(regulator_set_voltage_time);



/**

 * regulator_sync_voltage - re-apply last regulator output voltage

 * @regulator: regulator source

include/linux/regulator/consumer.h

+2 −0
Original line number Diff line number Diff line
@@ -153,6 +153,8 @@ int regulator_list_voltage(struct regulator *regulator, unsigned selector); 
int regulator_is_supported_voltage(struct regulator *regulator,

				   int min_uV, int max_uV);

int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);

int regulator_set_voltage_time(struct regulator *regulator,

			       int old_uV, int new_uV);

int regulator_get_voltage(struct regulator *regulator);

int regulator_sync_voltage(struct regulator *regulator);

int regulator_set_current_limit(struct regulator *regulator,