diff options
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/core.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 68549008582c..e11c2222d9af 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1442,6 +1442,35 @@ 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 * @min_uV: Minimum required voltage in uV |