Add dev_pm_opp_get_required_pstate() which allows OPP users to retrieve required performance state of a given OPP.
Signed-off-by: Dmitry Osipenko digetx@gmail.com --- drivers/opp/core.c | 22 ++++++++++++++++++++++ include/linux/pm_opp.h | 10 ++++++++++ 2 files changed, 32 insertions(+)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 0783a4ac819a..4774701ec82d 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -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 diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index a17d92d923cc..0298b426fba3 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -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); @@ -188,6 +191,13 @@ 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;