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regulator: Add regulator voltage range check API 

Simplify checking of support for voltage ranges by providing an API which
wraps the existing count and list operations.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2009-07-21 16:00:24 +01:00 committed by Liam Girdwood
parent 5ffbd136e6
commit a7a1ad9066
2 changed files with 31 additions and 0 deletions
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29
drivers/regulator/core.c
View File

@ -1441,6 +1441,35 @@ int regulator_list_voltage(struct regulator *regulator, unsigned selector)
}
EXPORT_SYMBOL_GPL(regulator_list_voltage);
/**
* regulator_is_supported_voltage - check if a voltage range can be supported
*
* @regulator: Regulator to check.
* @min_uV: Minimum required voltage in uV.
* @max_uV: Maximum required voltage in uV.
*
* Returns a boolean or a negative error code.
*/
int regulator_is_supported_voltage(struct regulator *regulator,
int min_uV, int max_uV)
{
int i, voltages, ret;
ret = regulator_count_voltages(regulator);
if (ret < 0)
return ret;
voltages = ret;
for (i = 0; i < voltages; i++) {
ret = regulator_list_voltage(regulator, i);
if (ret >= min_uV && ret <= max_uV)
return 1;
}
return 0;
}
/**
* regulator_set_voltage - set regulator output voltage
* @regulator: regulator source

2
include/linux/regulator/consumer.h
View File

@ -146,6 +146,8 @@ void regulator_bulk_free(int num_consumers,
int regulator_count_voltages(struct regulator *regulator);
int regulator_list_voltage(struct regulator *regulator, unsigned selector);
int regulator_is_supported_voltage(struct regulator *regulator,
int min_uV, int max_uV);
int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);
int regulator_get_voltage(struct regulator *regulator);
int regulator_set_current_limit(struct regulator *regulator,