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OPP: Add dev_pm_opp_find_level_floor()

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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>
This commit is contained in:
Krishna chaitanya chundru 2023-09-07 11:30:31 +05:30 committed by Viresh Kumar
parent 0025ff64ff
commit a0242c81bb
2 changed files with 34 additions and 0 deletions
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25
drivers/opp/core.c
View File

@ -813,6 +813,31 @@ 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

9
include/linux/pm_opp.h
View File

@ -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)
{