Commit 3ae1f39a authored by Sibi Sankar's avatar Sibi Sankar Committed by Viresh Kumar
Browse files

OPP: Add and export helper to set bandwidth 



Add and export 'dev_pm_opp_set_bw' to set the bandwidth
levels associated with an OPP.

Signed-off-by: default avatarSibi Sankar <sibis@codeaurora.org>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent fb091802

drivers/opp/core.c

+31 −0
Original line number Diff line number Diff line
@@ -831,6 +831,37 @@ static int _set_required_opps(struct device *dev, 
	return ret;

}



/**

 * dev_pm_opp_set_bw() - sets bandwidth levels corresponding to an opp

 * @dev:	device for which we do this operation

 * @opp:	opp based on which the bandwidth levels are to be configured

 *

 * This configures the bandwidth to the levels specified by the OPP. However

 * if the OPP specified is NULL the bandwidth levels are cleared out.

 *

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

 */

int dev_pm_opp_set_bw(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 table doesn't exist\n", __func__);

		return PTR_ERR(opp_table);

	}



	if (opp)

		ret = _set_opp_bw(opp_table, opp, dev, false);

	else

		ret = _set_opp_bw(opp_table, NULL, dev, true);



	dev_pm_opp_put_opp_table(opp_table);

	return ret;

}

EXPORT_SYMBOL_GPL(dev_pm_opp_set_bw);



/**

 * dev_pm_opp_set_rate() - Configure new OPP based on frequency

 * @dev:	 device for which we do this operation

include/linux/pm_opp.h

+6 −0
Original line number Diff line number Diff line
@@ -151,6 +151,7 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names 
void dev_pm_opp_detach_genpd(struct opp_table *opp_table);

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_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);

void dev_pm_opp_remove_table(struct device *dev);
@@ -342,6 +343,11 @@ static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_f 
	return -ENOTSUPP;

}



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

{

	return -EOPNOTSUPP;

}



static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)

{

	return -ENOTSUPP;