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Commit 19445b25 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Rafael J. Wysocki
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PM / OPP: add dev_pm_opp_is_turbo() helper 



Add dev_pm_opp_is_turbo() helper to verify if an opp is to be used only
for turbo mode or not.

Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 8d4d4e98

drivers/base/power/opp.c

+34 −0
Original line number Diff line number Diff line
@@ -280,6 +280,40 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) 
}

EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);



/**

 * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not

 * @opp: opp for which turbo mode is being verified

 *

 * Turbo OPPs are not for normal use, and can be enabled (under certain

 * conditions) for short duration of times to finish high throughput work

 * quickly. Running on them for longer times may overheat the chip.

 *

 * Return: true if opp is turbo opp, else false.

 *

 * Locking: This function must be called under rcu_read_lock(). opp is a rcu

 * protected pointer. This means that opp which could have been fetched by

 * opp_find_freq_{exact,ceil,floor} functions is valid as long as we are

 * under RCU lock. The pointer returned by the opp_find_freq family must be

 * used in the same section as the usage of this function with the pointer

 * prior to unlocking with rcu_read_unlock() to maintain the integrity of the

 * pointer.

 */

bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)

{

	struct dev_pm_opp *tmp_opp;



	opp_rcu_lockdep_assert();



	tmp_opp = rcu_dereference(opp);

	if (IS_ERR_OR_NULL(tmp_opp) || !tmp_opp->available) {

		pr_err("%s: Invalid parameters\n", __func__);

		return false;

	}



	return tmp_opp->turbo;

}

EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo);



/**

 * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds

 * @dev:	device for which we do this operation

include/linux/pm_opp.h

+7 −0
Original line number Diff line number Diff line
@@ -30,6 +30,8 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp); 


unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);



bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);



int dev_pm_opp_get_opp_count(struct device *dev);

unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
@@ -63,6 +65,11 @@ static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) 
	return 0;

}



static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)

{

	return false;

}



static inline int dev_pm_opp_get_opp_count(struct device *dev)

{

	return 0;