Commit 142e17c1 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam Committed by Viresh Kumar
Browse files

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



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: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[ Viresh: Rearranged definitions in pm_opp.h ]
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 754833b3

drivers/opp/core.c

+56 −0
Original line number Diff line number Diff line
@@ -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

include/linux/pm_opp.h

+18 −0
Original line number Diff line number Diff line
@@ -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)

{