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Commit 5b93ac54 authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Andy Gross
Browse files

OPP: Add support for parsing the 'opp-level' property 



Now that the OPP bindings are updated to include an optional
'opp-level' property, add support to parse it from device tree
and store it as part of dev_pm_opp structure.
Also add and export an helper 'dev_pm_opp_get_level()' that can be
used to get the level value read from device tree when present.

Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: default avatarAndy Gross <andy.gross@linaro.org>
parent cea8e2f3

drivers/opp/core.c

+18 −0
Original line number Diff line number Diff line
@@ -130,6 +130,24 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) 
}

EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);



/**

 * dev_pm_opp_get_level() - Gets the level corresponding to an available opp

 * @opp:	opp for which level value has to be returned for

 *

 * Return: level read from device tree corresponding to the opp, else

 * return 0.

 */

unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)

{

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

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

		return 0;

	}



	return opp->level;

}

EXPORT_SYMBOL_GPL(dev_pm_opp_get_level);



/**

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

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

drivers/opp/of.c

+2 −0
Original line number Diff line number Diff line
@@ -594,6 +594,8 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table, 
		new_opp->rate = (unsigned long)rate;

	}



	of_property_read_u32(np, "opp-level", &new_opp->level);



	/* Check if the OPP supports hardware's hierarchy of versions or not */

	if (!_opp_is_supported(dev, opp_table, np)) {

		dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);

drivers/opp/opp.h

+2 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ extern struct list_head opp_tables; 
 * @suspend:	true if suspend OPP

 * @pstate: Device's power domain's performance state.

 * @rate:	Frequency in hertz

 * @level:	Performance level

 * @supplies:	Power supplies voltage/current values

 * @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's

 *		frequency from any other OPP's frequency.
@@ -80,6 +81,7 @@ struct dev_pm_opp { 
	bool suspend;

	unsigned int pstate;

	unsigned long rate;

	unsigned int level;



	struct dev_pm_opp_supply *supplies;

include/linux/pm_opp.h

+7 −0
Original line number Diff line number Diff line
@@ -86,6 +86,8 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp); 


unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);



unsigned int dev_pm_opp_get_level(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);
@@ -157,6 +159,11 @@ static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) 
	return 0;

}



static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)

{

	return 0;

}



static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)

{

	return false;