diff options
| -rw-r--r-- | drivers/regulator/core.c | 45 | ||||
| -rw-r--r-- | include/linux/regulator/consumer.h | 2 |
2 files changed, 47 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index e7e4460dcb92..3ffc6979d164 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1765,6 +1765,51 @@ out: EXPORT_SYMBOL_GPL(regulator_set_voltage); /** + * regulator_set_voltage_time - get raise/fall time + * @regulator: regulator source + * @old_uV: starting voltage in microvolts + * @new_uV: target voltage in microvolts + * + * Provided with the starting and ending voltage, this function attempts to + * calculate the time in microseconds required to rise or fall to this new + * voltage. + */ +int regulator_set_voltage_time(struct regulator *regulator, + int old_uV, int new_uV) +{ + struct regulator_dev *rdev = regulator->rdev; + struct regulator_ops *ops = rdev->desc->ops; + int old_sel = -1; + int new_sel = -1; + int voltage; + int i; + + /* Currently requires operations to do this */ + if (!ops->list_voltage || !ops->set_voltage_time_sel + || !rdev->desc->n_voltages) + return -EINVAL; + + for (i = 0; i < rdev->desc->n_voltages; i++) { + /* We only look for exact voltage matches here */ + voltage = regulator_list_voltage(regulator, i); + if (voltage < 0) + return -EINVAL; + if (voltage == 0) + continue; + if (voltage == old_uV) + old_sel = i; + if (voltage == new_uV) + new_sel = i; + } + + if (old_sel < 0 || new_sel < 0) + return -EINVAL; + + return ops->set_voltage_time_sel(rdev, old_sel, new_sel); +} +EXPORT_SYMBOL_GPL(regulator_set_voltage_time); + +/** * regulator_sync_voltage - re-apply last regulator output voltage * @regulator: regulator source * diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/consumer.h index 7954f6bd7edb..9e87c1cb7270 100644 --- a/include/linux/regulator/consumer.h +++ b/include/linux/regulator/consumer.h @@ -153,6 +153,8 @@ 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_set_voltage_time(struct regulator *regulator, + int old_uV, int new_uV); int regulator_get_voltage(struct regulator *regulator); int regulator_sync_voltage(struct regulator *regulator); int regulator_set_current_limit(struct regulator *regulator, |