Optimize _regulator_do_set_voltage() for the case selector is equal to
old_selector. Since the voltage does not change, we don't need to call
set_voltage_sel() and set_voltage_time_sel() in this case.
Signed-off-by: Axel Lin <axel....@ingics.com>
---
drivers/regulator/core.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index de47880..e9df76e 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2239,8 +2239,11 @@ static int _regulator_do_set_voltage(struct
regulator_dev *rdev,
best_val = rdev->desc->ops->list_voltage(rdev, ret);
if (min_uV <= best_val && max_uV >= best_val) {
selector = ret;
- ret = rdev->desc->ops->set_voltage_sel(rdev,
- ret);
+ if (old_selector == selector)
+ ret = 0;
+ else
+ ret = rdev->desc->ops->set_voltage_sel(
+ rdev, ret);
} else {
ret = -EINVAL;
}
@@ -2251,7 +2254,7 @@ static int _regulator_do_set_voltage(struct regulator_dev
*rdev,
/* Call set_voltage_time_sel if successfully obtained old_selector */
if (ret == 0 && _regulator_is_enabled(rdev) && old_selector >= 0 &&
- rdev->desc->ops->set_voltage_time_sel) {
+ old_selector != selector && rdev->desc->ops->set_voltage_time_sel) {
delay = rdev->desc->ops->set_voltage_time_sel(rdev,
old_selector, selector);
--
1.7.9.5
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