[PATCH v3 07/12] opp: Add dev_pm_opp_get_required_pstate()
From: Dmitry Osipenko <digetx@gmail.com>
Date: 2021-01-18 01:06:04
Also in:
linux-pm, lkml
Subsystem:
operating performance points (opp), power management core, the rest · Maintainers:
Viresh Kumar, Nishanth Menon, Stephen Boyd, "Rafael J. Wysocki", Linus Torvalds
Add dev_pm_opp_get_required_pstate() which allows OPP users to retrieve required performance state of a given OPP. Tested-by: Peter Geis <redacted> Tested-by: Nicolas Chauvet <redacted> Tested-by: Matt Merhar <redacted> 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 df0969002555..fde2ec00ab0e 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 b7dc993487c7..e072148ae0e1 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);
@@ -194,6 +197,13 @@ 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;
--
2.29.2