regulator: core: Add regulator_set_voltage_time_sel to calculate ramp delay.
This patch adds regulator_set_voltage_time_sel(), to move into core, the commonly used code by drivers to provide the .set_voltage_time_sel callback. It will also allow us to configure different ramp delay for different regulators easily. Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
parent
ab0d1cbe55
commit
98a175b60f
2 changed files with 29 additions and 0 deletions
|
@ -2279,6 +2279,30 @@ int regulator_set_voltage_time(struct regulator *regulator,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(regulator_set_voltage_time);
|
||||
|
||||
/**
|
||||
*regulator_set_voltage_time_sel - get raise/fall time
|
||||
* @regulator: regulator source
|
||||
* @old_selector: selector for starting voltage
|
||||
* @new_selector: selector for target voltage
|
||||
*
|
||||
* 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 in their regulator_desc and 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,
|
||||
unsigned int old_selector,
|
||||
unsigned int new_selector)
|
||||
{
|
||||
if (rdev->desc->ramp_delay && rdev->desc->uV_step)
|
||||
return DIV_ROUND_UP(rdev->desc->uV_step *
|
||||
abs(new_selector - old_selector),
|
||||
rdev->desc->ramp_delay) * 1000;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* regulator_sync_voltage - re-apply last regulator output voltage
|
||||
* @regulator: regulator source
|
||||
|
|
|
@ -170,6 +170,7 @@ enum regulator_type {
|
|||
*
|
||||
* @min_uV: Voltage given by the lowest selector (if linear mapping)
|
||||
* @uV_step: Voltage increase with each selector (if linear mapping)
|
||||
* @ramp_delay: Time to settle down after voltage change (unit: mV/us)
|
||||
* @volt_table: Voltage mapping table (if table based mapping)
|
||||
*
|
||||
* @vsel_reg: Register for selector when using regulator_regmap_X_voltage_
|
||||
|
@ -189,6 +190,7 @@ struct regulator_desc {
|
|||
|
||||
unsigned int min_uV;
|
||||
unsigned int uV_step;
|
||||
unsigned int ramp_delay;
|
||||
|
||||
const unsigned int *volt_table;
|
||||
|
||||
|
@ -285,6 +287,9 @@ int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel);
|
|||
int regulator_is_enabled_regmap(struct regulator_dev *rdev);
|
||||
int regulator_enable_regmap(struct regulator_dev *rdev);
|
||||
int regulator_disable_regmap(struct regulator_dev *rdev);
|
||||
int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
|
||||
unsigned int old_selector,
|
||||
unsigned int new_selector);
|
||||
|
||||
void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
|
||||
|
||||
|
|
Loading…
Reference in a new issue