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| author | Krishna chaitanya chundru <quic_krichai@quicinc.com> | 2023-09-07 11:30:31 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2023-10-06 12:37:34 +0530 |
| commit | a0242c81bb759ef03184be8eddcc7d5bdf36cc16 (patch) | |
| tree | 4d68383a98dbd8d6f35a73163f101aabb932cc22 | |
| parent | 0025ff64ffcf6bd6ece5484e7818401f77bf115f (diff) | |
| download | lwn-a0242c81bb759ef03184be8eddcc7d5bdf36cc16.tar.gz lwn-a0242c81bb759ef03184be8eddcc7d5bdf36cc16.zip | |
OPP: Add dev_pm_opp_find_level_floor()
Add dev_pm_opp_find_level_floor(), as is done for frequency and
bandwidth.
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
[ Viresh: Updated commit log and rearranged code ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
| -rw-r--r-- | drivers/opp/core.c | 25 | ||||
| -rw-r--r-- | include/linux/pm_opp.h | 9 |
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 8978e94c9ca1..cdac46698021 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -814,6 +814,31 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev, EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_ceil); /** + * dev_pm_opp_find_level_floor() - Search for a rounded floor level + * @dev: device for which we do this operation + * @level: Start level + * + * Search for the matching floor *available* OPP from a starting level + * for a device. + * + * Return: matching *opp and refreshes *level accordingly, else returns + * ERR_PTR in case of error and should be handled using IS_ERR. Error return + * values can be: + * EINVAL: for bad pointer + * ERANGE: no match found for search + * ENODEV: if device not found in list of registered devices + * + * The callers are required to call dev_pm_opp_put() for the returned OPP after + * use. + */ +struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev, + unsigned long *level) +{ + return _find_key_floor(dev, level, 0, true, _read_level, NULL); +} +EXPORT_SYMBOL_GPL(dev_pm_opp_find_level_floor); + +/** * dev_pm_opp_find_bw_ceil() - Search for a rounded ceil bandwidth * @dev: device for which we do this operation * @bw: start bandwidth diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index 9ad168f4cbf1..ccd97bcef269 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -156,6 +156,9 @@ struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev, struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev, unsigned int *level); +struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev, + unsigned long *level); + struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev, unsigned int *bw, int index); @@ -320,6 +323,12 @@ static inline struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev, return ERR_PTR(-EOPNOTSUPP); } +static inline struct dev_pm_opp *dev_pm_opp_find_level_floor(struct device *dev, + unsigned long *level) +{ + return ERR_PTR(-EOPNOTSUPP); +} + static inline struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev, unsigned int *bw, int index) { |