diff options
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index a12cba32460e..ab419f8b2a84 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1697,10 +1697,17 @@ static int _regulator_do_set_voltage(struct regulator_dev *rdev, int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) { struct regulator_dev *rdev = regulator->rdev; - int ret; + int ret = 0; mutex_lock(&rdev->mutex); + /* If we're setting the same range as last time the change + * should be a noop (some cpufreq implementations use the same + * voltage for multiple frequencies, for example). + */ + if (regulator->min_uV == min_uV && regulator->max_uV == max_uV) + goto out; + /* sanity check */ if (!rdev->desc->ops->set_voltage && !rdev->desc->ops->set_voltage_sel) { |