Commit 8174a3a6 authored by Viresh Kumar's avatar Viresh Kumar
Browse files

OPP: Provide a simple implementation to configure multiple clocks 



This provides a simple implementation to configure multiple clocks for a
device.

Tested-by: default avatarDmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent f123ea74

drivers/opp/core.c

+34 −0
Original line number Diff line number Diff line
@@ -843,6 +843,40 @@ _opp_config_clk_single(struct device *dev, struct opp_table *opp_table, 
	return ret;

}



/*

 * Simple implementation for configuring multiple clocks. Configure clocks in

 * the order in which they are present in the array while scaling up.

 */

int dev_pm_opp_config_clks_simple(struct device *dev,

		struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,

		bool scaling_down)

{

	int ret, i;



	if (scaling_down) {

		for (i = opp_table->clk_count - 1; i >= 0; i--) {

			ret = clk_set_rate(opp_table->clks[i], opp->rates[i]);

			if (ret) {

				dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,

					ret);

				return ret;

			}

		}

	} else {

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

			ret = clk_set_rate(opp_table->clks[i], opp->rates[i]);

			if (ret) {

				dev_err(dev, "%s: failed to set clock rate: %d\n", __func__,

					ret);

				return ret;

			}

		}

	}



	return ret;

}

EXPORT_SYMBOL_GPL(dev_pm_opp_config_clks_simple);



static int _opp_config_regulator_single(struct device *dev,

			struct dev_pm_opp *old_opp, struct dev_pm_opp *new_opp,

			struct regulator **regulators, unsigned int count)

include/linux/pm_opp.h

+10 −0
Original line number Diff line number Diff line
@@ -159,6 +159,9 @@ int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb 
int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);

int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);

void dev_pm_opp_clear_config(int token);

int dev_pm_opp_config_clks_simple(struct device *dev,

		struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,

		bool scaling_down);



struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, struct opp_table *dst_table, struct dev_pm_opp *src_opp);

int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
@@ -342,6 +345,13 @@ static inline int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_c 


static inline void dev_pm_opp_clear_config(int token) {}



static inline int dev_pm_opp_config_clks_simple(struct device *dev,

		struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,

		bool scaling_down)

{

	return -EOPNOTSUPP;

}



static inline struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table,

				struct opp_table *dst_table, struct dev_pm_opp *src_opp)

{