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| author |   Dmitry Osipenko <digetx@gmail.com> | 2021-01-18 03:55:19 +0300 |
|---|---|---|
| committer |   Viresh Kumar <viresh.kumar@linaro.org> | 2021-02-02 10:27:04 +0530 |
| commit | 597ff5431fd41afa888809f7936508a15c977cde (patch) | |
| tree | 8b1179a8ba324c6fd3dace96cad3749fe4bc7756 /drivers/opp | |
| parent | opp: Add dev_pm_opp_find_level_ceil() (diff) | |
| download | linux-dev-597ff5431fd41afa888809f7936508a15c977cde.tar.xz linux-dev-597ff5431fd41afa888809f7936508a15c977cde.zip | |
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.c | 22 |
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 * |