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-rw-r--r--drivers/extcon/extcon.c44
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);
/**