• Chanwoo Choi's avatar
    extcon: Use the unique id for external connector instead of string · 2a9de9c0
    Chanwoo Choi authored
    This patch uses the unique id to identify the type of external connector instead
    of string name. The string name have the many potential issues. So, this patch
    defines the 'extcon' enumeration which includes all supported external connector
    on EXTCON subsystem. If new external connector is necessary, the unique id of
    new connector have to be added in 'extcon' enumeration. There are current
    supported external connector in 'enum extcon' as following:
    
    enum extcon {
    	EXTCON_NONE		= 0x0,
    
    	/* USB external connector */
    	EXTCON_USB		= 0x1,
    	EXTCON_USB_HOST		= 0x2,
    
    	/* Charger external connector */
    	EXTCON_TA		= 0x10,
    	EXTCON_FAST_CHARGER	= 0x11,
    	EXTCON_SLOW_CHARGER	= 0x12,
    	EXTCON_CHARGE_DOWNSTREAM = 0x13,
    
    	/* Audio and video external connector */
    	EXTCON_LINE_IN		= 0x20,
    	EXTCON_LINE_OUT		= 0x21,
    	EXTCON_MICROPHONE	= 0x22,
    	EXTCON_HEADPHONE	= 0x23,
    
    	EXTCON_HDMI		= 0x30,
    	EXTCON_MHL		= 0x31,
    	EXTCON_DVI		= 0x32,
    	EXTCON_VGA		= 0x33,
    	EXTCON_SPDIF_IN		= 0x34,
    	EXTCON_SPDIF_OUT	= 0x35,
    	EXTCON_VIDEO_IN		= 0x36,
    	EXTCON_VIDEO_OUT	= 0x37,
    
    	/* Miscellaneous external connector */
    	EXTCON_DOCK		= 0x50,
    	EXTCON_JIG		= 0x51,
    	EXTCON_MECHANICAL	= 0x52,
    
    	EXTCON_END,
    };
    
    For example in extcon-arizona.c:
    To use unique id removes the potential issue about handling
    the inconsistent name of external connector with string.
    - Previously, use the string to register the type of arizona jack connector
    static const char *arizona_cable[] = {
    	"Mechanical",
    	"Microphone",
    	"Headphone",
    	"Line-out",
    };
    - Newly, use the unique id to register the type of arizona jack connector
    static const enum extcon arizona_cable[] = {
    	EXTCON_MECHANICAL,
    	EXTCON_MICROPHONE,
    	EXTCON_HEADPHONE,
    	EXTCON_LINE_OUT,
    
    	EXTCON_NONE,
    };
    
    And this patch modify the prototype of extcon_{get|set}_cable_state_() which
    uses the 'enum extcon id' instead of 'cable_index'. Because although one more
    extcon drivers support USB cable, each extcon driver might has the differnt
    'cable_index' for USB cable. All extcon drivers can use the unique id number
    for same external connector with modified extcon_{get|set}_cable_state_().
    
    - Previously, use 'cable_index' on these functions:
    extcon_get_cable_state_(struct extcon_dev*, int cable_index)
    extcon_set_cable_state_(struct extcon_dev*, int cable_index, bool state)
    
    -Newly, use 'enum extcon id' on these functions:
    extcon_get_cable_state_(struct extcon_dev*, enum extcon id)
    extcon_set_cable_state_(struct extcon_dev*, enum extcon id, bool state)
    
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Felipe Balbi <balbi@ti.com>
    Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
    Acked-by: default avatarRoger Quadros <rogerq@ti.com>
    Acked-by: default avatarCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
    Acked-by: default avatarRamakrishna Pallala <ramakrishna.pallala@intel.com>
    Reviewed-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
    [arnd: Report the build break about drivers/usb/phy/phy-tahvo.c after using the
    unique id for external connector insteadf of string]
    Reported-by: default avatarArnd Bergmann <arnd@arndb.de>
    [dan.carpenter: Report the build warning of extcon_{set|get}_cable_state_()]
    Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
    2a9de9c0
extcon.c 28.5 KB