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| author | Axel Lin <axel.lin@gmail.com> | 2012-06-19 09:38:45 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-23 12:28:12 +0100 |
| commit | f11d08c3d611d6f2845677caabe13b2c58f95658 (patch) | |
| tree | 1ea840b7f48236a357828282f062079dd39333cd /drivers/regulator | |
| parent | baae019efe84b6d2c6d5e7e7e1c9cfa130ad6b2a (diff) | |
| download | blackbird-op-linux-f11d08c3d611d6f2845677caabe13b2c58f95658.tar.gz blackbird-op-linux-f11d08c3d611d6f2845677caabe13b2c58f95658.zip | |
regulator: Use list_voltage() to get voltage in regulator_set_voltage_time_sel
With this change, regulator_set_voltage_time_sel() can be more generic and not
limited to linear and table based mapping now.
One side-effect of this change is that list_voltage() must be implemented.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/core.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 26b71048709b..e3597ab09be3 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2296,8 +2296,7 @@ EXPORT_SYMBOL_GPL(regulator_set_voltage_time); * Provided with the starting and target voltage selectors, this function * returns time in microseconds required to rise or fall to this new voltage * - * Drivers providing uV_step or volt_table in their regulator_desc and - * ramp_delay in regulation_constraints can use this as their + * Drivers providing ramp_delay in regulation_constraints can use this as their * set_voltage_time_sel() operation. */ int regulator_set_voltage_time_sel(struct regulator_dev *rdev, @@ -2305,6 +2304,7 @@ int regulator_set_voltage_time_sel(struct regulator_dev *rdev, unsigned int new_selector) { unsigned int ramp_delay = 0; + int old_volt, new_volt; if (rdev->constraints->ramp_delay) ramp_delay = rdev->constraints->ramp_delay; @@ -2316,19 +2316,14 @@ int regulator_set_voltage_time_sel(struct regulator_dev *rdev, return 0; } - if (rdev->desc->uV_step) { - return DIV_ROUND_UP(rdev->desc->uV_step * - abs(new_selector - old_selector), - ramp_delay); - } else if (rdev->desc->volt_table) { - return DIV_ROUND_UP(abs(rdev->desc->volt_table[new_selector] - - rdev->desc->volt_table[old_selector]), - ramp_delay); - } else { - rdev_warn(rdev, "Unsupported voltage mapping settings\n"); - } + /* sanity check */ + if (!rdev->desc->ops->list_voltage) + return -EINVAL; - return 0; + old_volt = rdev->desc->ops->list_voltage(rdev, old_selector); + new_volt = rdev->desc->ops->list_voltage(rdev, new_selector); + + return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay); } EXPORT_SYMBOL_GPL(regulator_set_voltage_time_sel); |
