diff options
Diffstat (limited to 'drivers/extcon')
| -rw-r--r-- | drivers/extcon/extcon.c | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c index cb38c2747684..8bff5fd18185 100644 --- a/drivers/extcon/extcon.c +++ b/drivers/extcon/extcon.c @@ -1336,6 +1336,28 @@ void extcon_dev_unregister(struct extcon_dev *edev) EXPORT_SYMBOL_GPL(extcon_dev_unregister); #ifdef CONFIG_OF + +/* + * extcon_find_edev_by_node - Find the extcon device from devicetree. + * @node : OF node identifying edev + * + * Return the pointer of extcon device if success or ERR_PTR(err) if fail. + */ +struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) +{ + struct extcon_dev *edev; + + mutex_lock(&extcon_dev_list_lock); + list_for_each_entry(edev, &extcon_dev_list, entry) + if (edev->dev.parent && edev->dev.parent->of_node == node) + goto out; + edev = ERR_PTR(-EPROBE_DEFER); +out: + mutex_unlock(&extcon_dev_list_lock); + + return edev; +} + /* * extcon_get_edev_by_phandle - Get the extcon device from devicetree. * @dev : the instance to the given device @@ -1363,25 +1385,27 @@ struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) return ERR_PTR(-ENODEV); } - mutex_lock(&extcon_dev_list_lock); - list_for_each_entry(edev, &extcon_dev_list, entry) { - if (edev->dev.parent && edev->dev.parent->of_node == node) { - mutex_unlock(&extcon_dev_list_lock); - of_node_put(node); - return edev; - } - } - mutex_unlock(&extcon_dev_list_lock); + edev = extcon_find_edev_by_node(node); of_node_put(node); - return ERR_PTR(-EPROBE_DEFER); + return edev; } + #else + +struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) +{ + return ERR_PTR(-ENOSYS); +} + struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) { return ERR_PTR(-ENOSYS); } + #endif /* CONFIG_OF */ + +EXPORT_SYMBOL_GPL(extcon_find_edev_by_node); EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); /** |