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>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 26b7104..e3597ab 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2296,8 +2296,7 @@
* 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 @@
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 @@
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);