diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/regulator/core.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index e3661c20cf3..56f4ca0854c 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2138,6 +2138,37 @@ int regulator_map_voltage_iterate(struct regulator_dev *rdev, EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate); /** + * regulator_map_voltage_ascend - map_voltage() for ascendant voltage list + * + * @rdev: Regulator to operate on + * @min_uV: Lower bound for voltage + * @max_uV: Upper bound for voltage + * + * Drivers that have ascendant voltage list can use this as their + * map_voltage() operation. + */ +int regulator_map_voltage_ascend(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + int i, ret; + + for (i = 0; i < rdev->desc->n_voltages; i++) { + ret = rdev->desc->ops->list_voltage(rdev, i); + if (ret < 0) + continue; + + if (ret > max_uV) + break; + + if (ret >= min_uV && ret <= max_uV) + return i; + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend); + +/** * regulator_map_voltage_linear - map_voltage() for simple linear mappings * * @rdev: Regulator to operate on |