summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDmitry Osipenko <digetx@gmail.com>2021-01-18 03:55:19 +0300
committerViresh Kumar <viresh.kumar@linaro.org>2021-02-02 10:27:04 +0530
commit597ff5431fd41afa888809f7936508a15c977cde (patch)
tree8b1179a8ba324c6fd3dace96cad3749fe4bc7756
parent8dd5cada393f6f4e825833a6ff05b1f51f36a791 (diff)
opp: Add dev_pm_opp_get_required_pstate()
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>
-rw-r--r--drivers/opp/core.c22
-rw-r--r--include/linux/pm_opp.h10
2 files changed, 32 insertions, 0 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index b29f31146770..64a95aaa90eb 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -146,6 +146,28 @@ 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 2b3030cb2ed2..8f926815bad9 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);
@@ -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;