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extcon: Add extcon_dev_allocate/free() to control the memory of extcon device

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This patch add APIs to control the extcon device on extcon provider driver.
The extcon_dev_allocate() allocates the memory of extcon device and initializes
supported cables. And then extcon_dev_free() decrement the reference of the
device of extcon device and free the memory of the extcon device. This APIs
must need to implement devm_extcon_dev_allocate()/free() APIs.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Chanwoo Choi 2014-04-24 19:46:49 +09:00
parent d88cc36704
commit a9af65223b
2 changed files with 49 additions and 0 deletions
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13
include/linux/extcon.h
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@ -191,6 +191,12 @@ extern void devm_extcon_dev_unregister(struct device *dev,
struct extcon_dev *edev);
extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
/*
* Following APIs control the memory of extcon device.
*/
extern struct extcon_dev *extcon_dev_allocate(const char **cables);
extern void extcon_dev_free(struct extcon_dev *edev);
/*
* get/set/update_state access the 32b encoded state value, which represents
* states of all possible cables of the multistate port. For example, if one
@ -267,6 +273,13 @@ static inline int devm_extcon_dev_register(struct device *dev,
static inline void devm_extcon_dev_unregister(struct device *dev,
struct extcon_dev *edev) { }
static inline struct extcon_dev *extcon_dev_allocate(const char **cables)
{
return ERR_PTR(-ENOSYS);
}
static inline void extcon_dev_free(struct extcon_dev *edev) { }
static inline u32 extcon_get_state(struct extcon_dev *edev)
{
return 0;