diff options
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/core.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 8a5d0ae191b3..a48cf582dcd0 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1273,15 +1273,17 @@ static int _regulator_enable(struct regulator_dev *rdev) { int ret, delay; - /* do we need to enable the supply regulator first */ - if (rdev->supply) { - mutex_lock(&rdev->supply->mutex); - ret = _regulator_enable(rdev->supply); - mutex_unlock(&rdev->supply->mutex); - if (ret < 0) { - printk(KERN_ERR "%s: failed to enable %s: %d\n", - __func__, rdev_get_name(rdev), ret); - return ret; + if (rdev->use_count == 0) { + /* do we need to enable the supply regulator first */ + if (rdev->supply) { + mutex_lock(&rdev->supply->mutex); + ret = _regulator_enable(rdev->supply); + mutex_unlock(&rdev->supply->mutex); + if (ret < 0) { + printk(KERN_ERR "%s: failed to enable %s: %d\n", + __func__, rdev_get_name(rdev), ret); + return ret; + } } } |