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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 /drivers/opp
parent8dd5cada393f6f4e825833a6ff05b1f51f36a791 (diff)
downloadlinux-597ff5431fd41afa888809f7936508a15c977cde.tar.bz2
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>
Diffstat (limited to 'drivers/opp')
-rw-r--r--drivers/opp/core.c22
1 files changed, 22 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
*