Commit ce8073d8 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Viresh Kumar
Browse files

opp: Add dev_pm_opp_sync_regulators() 



Extend OPP API with dev_pm_opp_sync_regulators() function, which syncs
voltage state of regulators.

Tested-by: default avatarPeter Geis <pgwipeout@gmail.com>
Tested-by: default avatarNicolas Chauvet <kwizart@gmail.com>
Tested-by: default avatarMatt Merhar <mattmerhar@protonmail.com>
Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
[ Viresh: Added unlikely() ]
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 597ff543

drivers/opp/core.c

+41 −0
Original line number Diff line number Diff line
@@ -2584,3 +2584,44 @@ void dev_pm_opp_remove_table(struct device *dev) 
	dev_pm_opp_put_opp_table(opp_table);

}

EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);



/**

 * dev_pm_opp_sync_regulators() - Sync state of voltage regulators

 * @dev:	device for which we do this operation

 *

 * Sync voltage state of the OPP table regulators.

 *

 * Return: 0 on success or a negative error value.

 */

int dev_pm_opp_sync_regulators(struct device *dev)

{

	struct opp_table *opp_table;

	struct regulator *reg;

	int i, ret = 0;



	/* Device may not have OPP table */

	opp_table = _find_opp_table(dev);

	if (IS_ERR(opp_table))

		return 0;



	/* Regulator may not be required for the device */

	if (unlikely(!opp_table->regulators))

		goto put_table;



	/* Nothing to sync if voltage wasn't changed */

	if (!opp_table->enabled)

		goto put_table;



	for (i = 0; i < opp_table->regulator_count; i++) {

		reg = opp_table->regulators[i];

		ret = regulator_sync_voltage(reg);

		if (ret)

			break;

	}

put_table:

	/* Drop reference taken by _find_opp_table() */

	dev_pm_opp_put_opp_table(opp_table);



	return ret;

}

EXPORT_SYMBOL_GPL(dev_pm_opp_sync_regulators);

include/linux/pm_opp.h

+6 −0
Original line number Diff line number Diff line
@@ -161,6 +161,7 @@ int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cp 
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);

void dev_pm_opp_remove_table(struct device *dev);

void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);

int dev_pm_opp_sync_regulators(struct device *dev);

#else

static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)

{
@@ -384,6 +385,11 @@ static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask 
{

}



static inline int dev_pm_opp_sync_regulators(struct device *dev)

{

	return -ENOTSUPP;

}



#endif		/* CONFIG_PM_OPP */



#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)