diff options
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index a2dc6223e8d2..e611f6797e6a 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2656,6 +2656,47 @@ out: EXPORT_SYMBOL_GPL(regulator_suspend_prepare); /** + * regulator_suspend_finish - resume regulators from system wide suspend + * + * Turn on regulators that might be turned off by regulator_suspend_prepare + * and that should be turned on according to the regulators properties. + */ +int regulator_suspend_finish(void) +{ + struct regulator_dev *rdev; + int ret = 0, error; + + mutex_lock(®ulator_list_mutex); + list_for_each_entry(rdev, ®ulator_list, list) { + struct regulator_ops *ops = rdev->desc->ops; + + mutex_lock(&rdev->mutex); + if ((rdev->use_count > 0 || rdev->constraints->always_on) && + ops->enable) { + error = ops->enable(rdev); + if (error) + ret = error; + } else { + if (!has_full_constraints) + goto unlock; + if (!ops->disable) + goto unlock; + if (ops->is_enabled && !ops->is_enabled(rdev)) + goto unlock; + + error = ops->disable(rdev); + if (error) + ret = error; + } +unlock: + mutex_unlock(&rdev->mutex); + } + mutex_unlock(®ulator_list_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(regulator_suspend_finish); + +/** * regulator_has_full_constraints - the system has fully specified constraints * * Calling this function will cause the regulator API to disable all |