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OPP: Introduce dev_pm_opp_find_freq_{ceil/floor}_indexed() APIs

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In the case of devices with multiple clocks, drivers need to specify the
clock index for the OPP framework to find the OPP corresponding to the
floor/ceil of the supplied frequency. So let's introduce the two new APIs
accepting the clock index as an argument.

These APIs use the exising _find_key_ceil() helper by supplying the clock
index to it.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[ Viresh: Rearranged definitions in pm_opp.h ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Manivannan Sadhasivam 2023-07-20 11:10:52 +05:30 committed by Viresh Kumar
parent 754833b319
commit 142e17c1c2
2 changed files with 74 additions and 0 deletions
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56
drivers/opp/core.c
View file

@ -658,6 +658,34 @@ struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
/**
* dev_pm_opp_find_freq_ceil_indexed() - Search for a rounded ceil freq for the
* clock corresponding to the index
* @dev: Device for which we do this operation
* @freq: Start frequency
* @index: Clock index
*
* Search for the matching ceil *available* OPP for the clock corresponding to
* the specified index from a starting freq for a device.
*
* Return: matching *opp and refreshes *freq 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_freq_ceil_indexed(struct device *dev, unsigned long *freq,
u32 index)
{
return _find_key_ceil(dev, freq, index, true, _read_freq, NULL);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_indexed);
/**
* dev_pm_opp_find_freq_floor() - Search for a rounded floor freq
* @dev: device for which we do this operation
@ -683,6 +711,34 @@ struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
/**
* dev_pm_opp_find_freq_floor_indexed() - Search for a rounded floor freq for the
* clock corresponding to the index
* @dev: Device for which we do this operation
* @freq: Start frequency
* @index: Clock index
*
* Search for the matching floor *available* OPP for the clock corresponding to
* the specified index from a starting freq for a device.
*
* Return: matching *opp and refreshes *freq 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_freq_floor_indexed(struct device *dev, unsigned long *freq,
u32 index)
{
return _find_key_floor(dev, freq, index, true, _read_freq, NULL);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor_indexed);
/**
* dev_pm_opp_find_level_exact() - search for an exact level
* @dev: device for which we do this operation

18
include/linux/pm_opp.h
View file

@ -125,9 +125,15 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq);
struct dev_pm_opp *dev_pm_opp_find_freq_floor_indexed(struct device *dev,
unsigned long *freq, u32 index);
struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq);
struct dev_pm_opp *dev_pm_opp_find_freq_ceil_indexed(struct device *dev,
unsigned long *freq, u32 index);
struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level);
@ -261,12 +267,24 @@ static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *
dev_pm_opp_find_freq_floor_indexed(struct device *dev, unsigned long *freq, u32 index)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *
dev_pm_opp_find_freq_ceil_indexed(struct device *dev, unsigned long *freq, u32 index)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
unsigned int level)
{