extcon: Move OF helper function to extcon core and change function name

This patch move simply OF helper function to extcon core and change function
name as following:
- of_extcon_get_extcon_dev() -> extcon_get_edev_by_phandle()

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 21c59af1150..f488145bb2d 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -240,6 +240,12 @@ extern int extcon_register_notifier(struct extcon_dev *edev,
 				    struct notifier_block *nb);
 extern int extcon_unregister_notifier(struct extcon_dev *edev,
 				      struct notifier_block *nb);
+
+/*
+ * Following API get the extcon device from devicetree.
+ * This function use phandle of devicetree to get extcon device directly.
+ */
+extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index);
 #else /* CONFIG_EXTCON */
 static inline int extcon_dev_register(struct extcon_dev *edev)
 {
@@ -324,5 +330,11 @@ static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
 {
 	return 0;
 }
+
+static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
+							    int index)
+{
+	return ERR_PTR(-ENODEV);
+}
 #endif /* CONFIG_EXTCON */
 #endif /* __LINUX_EXTCON_H__ */