extcon: Add devm_extcon_dev_allocate/free to manage the resource of extcon device

This patch add device managed devm_extcon_dev_{allocate,free} to automatically
free the memory of extcon_dev structure without handling free operation.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 15361a2f2f19..36f49c405dfb 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -196,6 +196,9 @@ extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
  */
 extern struct extcon_dev *extcon_dev_allocate(const char **cables);
 extern void extcon_dev_free(struct extcon_dev *edev);
+extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
+						   const char **cables);
+extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
 
 /*
  * get/set/update_state access the 32b encoded state value, which represents
@@ -280,6 +283,14 @@ static inline struct extcon_dev *extcon_dev_allocate(const char **cables)
 
 static inline void extcon_dev_free(struct extcon_dev *edev) { }
 
+static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
+							  const char **cables)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
+
 static inline u32 extcon_get_state(struct extcon_dev *edev)
 {
 	return 0;