Commit abbe3483 authored by Viresh Kumar's avatar Viresh Kumar
Browse files

opp: Implement dev_pm_opp_set_opp() 



The new helper dev_pm_opp_set_opp() can be used for configuring the
devices for a particular OPP and can be used by different type of
devices, even the ones which don't change frequency (like power
domains).

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Tested-by: default avatarDmitry Osipenko <digetx@gmail.com>
parent 509e4777

drivers/opp/core.c

+28 −0
Original line number Diff line number Diff line
@@ -1136,6 +1136,34 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) 
}

EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate);



/**

 * dev_pm_opp_set_opp() - Configure device for OPP

 * @dev: device for which we do this operation

 * @opp: OPP to set to

 *

 * This configures the device based on the properties of the OPP passed to this

 * routine.

 *

 * Return: 0 on success, a negative error number otherwise.

 */

int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp)

{

	struct opp_table *opp_table;

	int ret;



	opp_table = _find_opp_table(dev);

	if (IS_ERR(opp_table)) {

		dev_err(dev, "%s: device opp doesn't exist\n", __func__);

		return PTR_ERR(opp_table);

	}



	ret = _set_opp(dev, opp_table, opp, opp ? opp->rate : 0);

	dev_pm_opp_put_opp_table(opp_table);



	return ret;

}

EXPORT_SYMBOL_GPL(dev_pm_opp_set_opp);



/* OPP-dev Helpers */

static void _remove_opp_dev(struct opp_device *opp_dev,

			    struct opp_table *opp_table)

include/linux/pm_opp.h

+6 −0
Original line number Diff line number Diff line
@@ -158,6 +158,7 @@ void dev_pm_opp_detach_genpd(struct opp_table *opp_table); 
struct opp_table *devm_pm_opp_attach_genpd(struct device *dev, const char **names, struct device ***virt_devs);

int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);

int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);

int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp);

int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp);

int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);

int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
@@ -377,6 +378,11 @@ static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_f 
	return -ENOTSUPP;

}



static inline int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp)

{

	return -ENOTSUPP;

}



static inline int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)

{

	return -EOPNOTSUPP;