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regulator: Support set_voltage_time_sel for drivers implement set_voltage

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In currently implementation of _regulator_do_set_voltage, set_voltage_time_sel will
only be called if set_voltage_sel is implemented.

set_voltage_time_sel actually only needs get_voltage_sel to get old_selector.

This patch makes regulator core support set_voltage_time_sel for drivers
implement either set_voltage or set_voltage_sel.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-04-04 10:32:10 +08:00 committed by Mark Brown
parent 576ca4367f
commit eba41a5e8c
1 changed files with 31 additions and 28 deletions
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59
drivers/regulator/core.c
View file

@ -1856,23 +1856,35 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev,
int ret;
int delay = 0;
unsigned int selector;
int old_selector = -1;
int best_val = INT_MAX;
trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV);
min_uV += rdev->constraints->uV_offset;
max_uV += rdev->constraints->uV_offset;
/*
* If we can't obtain the old selector there is not enough
* info to call set_voltage_time_sel().
*/
if (rdev->desc->ops->set_voltage_time_sel &&
rdev->desc->ops->get_voltage_sel) {
old_selector = rdev->desc->ops->get_voltage_sel(rdev);
if (old_selector < 0)
return old_selector;
}
if (rdev->desc->ops->set_voltage) {
ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV,
&selector);
if (rdev->desc->ops->list_voltage)
selector = rdev->desc->ops->list_voltage(rdev,
best_val = rdev->desc->ops->list_voltage(rdev,
selector);
else
selector = -1;
best_val = -1;
} else if (rdev->desc->ops->set_voltage_sel) {
int best_val = INT_MAX;
int i;
selector = 0;
@ -1891,36 +1903,27 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev,
}
}
/*
* If we can't obtain the old selector there is not enough
* info to call set_voltage_time_sel().
*/
if (rdev->desc->ops->set_voltage_time_sel &&
rdev->desc->ops->get_voltage_sel) {
unsigned int old_selector = 0;
ret = rdev->desc->ops->get_voltage_sel(rdev);
if (ret < 0)
return ret;
old_selector = ret;
ret = rdev->desc->ops->set_voltage_time_sel(rdev,
old_selector, selector);
if (ret < 0)
rdev_warn(rdev, "set_voltage_time_sel() failed: %d\n", ret);
else
delay = ret;
}
if (best_val != INT_MAX) {
if (best_val != INT_MAX)
ret = rdev->desc->ops->set_voltage_sel(rdev, selector);
selector = best_val;
} else {
else
ret = -EINVAL;
}
} else {
ret = -EINVAL;
}
/* Call set_voltage_time_sel if successfully obtained old_selector */
if (ret == 0 && old_selector >= 0 &&
rdev->desc->ops->set_voltage_time_sel) {
delay = rdev->desc->ops->set_voltage_time_sel(rdev,
old_selector, selector);
if (delay < 0) {
rdev_warn(rdev, "set_voltage_time_sel() failed: %d\n",
delay);
delay = 0;
}
}
/* Insert any necessary delays */
if (delay >= 1000) {
mdelay(delay / 1000);
@ -1933,7 +1936,7 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev,
_notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE,
NULL);
trace_regulator_set_voltage_complete(rdev_get_name(rdev), selector);
trace_regulator_set_voltage_complete(rdev_get_name(rdev), best_val);
return ret;
}