diff options
| author | Axel Lin <axel.lin@gmail.com> | 2012-05-20 10:30:21 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-03 13:19:45 +0100 |
| commit | cffc9592fde309deafce12362e0a285108cfa3c8 (patch) | |
| tree | bdd8ae2815fc8ac4aff7935eda79ee31bcb07cf8 /drivers/regulator | |
| parent | f8f5701bdaf9134b1f90e5044a82c66324d2073f (diff) | |
regulator: core: Allow drivers to set voltage mapping table in regulator_desc
Some regulator hardware use table based mapping can set volt_table in
regulator_desc and use regulator_list_voltage_table() for their list_voltage
callback.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/core.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 7584a74eec8a..333b7ebe7cae 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1883,6 +1883,31 @@ int regulator_list_voltage_linear(struct regulator_dev *rdev, EXPORT_SYMBOL_GPL(regulator_list_voltage_linear); /** + * regulator_list_voltage_table - List voltages with table based mapping + * + * @rdev: Regulator device + * @selector: Selector to convert into a voltage + * + * Regulators with table based mapping between voltages and + * selectors can set volt_table in the regulator descriptor + * and then use this function as their list_voltage() operation. + */ +int regulator_list_voltage_table(struct regulator_dev *rdev, + unsigned int selector) +{ + if (!rdev->desc->volt_table) { + BUG_ON(!rdev->desc->volt_table); + return -EINVAL; + } + + if (selector >= rdev->desc->n_voltages) + return -EINVAL; + + return rdev->desc->volt_table[selector]; +} +EXPORT_SYMBOL_GPL(regulator_list_voltage_table); + +/** * regulator_list_voltage - enumerate supported voltages * @regulator: regulator source * @selector: identify voltage to list |