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opp: Add dev_pm_opp_get_required_pstate()

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Add dev_pm_opp_get_required_pstate() which allows OPP users to retrieve
required performance state of a given OPP.

Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Dmitry Osipenko 2021-01-18 03:55:19 +03:00 committed by Viresh Kumar
parent 8dd5cada39
commit 597ff5431f
2 changed files with 32 additions and 0 deletions
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22
drivers/opp/core.c
View File

@ -145,6 +145,28 @@ unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_level);
/**
* dev_pm_opp_get_required_pstate() - Gets the required performance state
* corresponding to an available opp
* @opp: opp for which performance state has to be returned for
* @index: index of the required opp
*
* Return: performance state read from device tree corresponding to the
* required opp, else return 0.
*/
unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
unsigned int index)
{
if (IS_ERR_OR_NULL(opp) || !opp->available ||
index >= opp->opp_table->required_opp_count) {
pr_err("%s: Invalid parameters\n", __func__);
return 0;
}
return opp->required_opps[index]->pstate;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_required_pstate);
/**
* dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not
* @opp: opp for which turbo mode is being verified

10
include/linux/pm_opp.h
View File

@ -98,6 +98,9 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
unsigned int index);
bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
int dev_pm_opp_get_opp_count(struct device *dev);
@ -186,6 +189,13 @@ static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
return 0;
}
static inline
unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
unsigned int index)
{
return 0;
}
static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
{
return false;