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Commit db622861 authored by Baolin Wang's avatar Baolin Wang Committed by Chanwoo Choi
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extcon: Add documentation for EXTCON_CHG_USB_* and EXTCON_USB_* 



Current there is both "EXTCON_USB" and "EXTCON_CHG_USB_SDP" which
both seem to suggest a standard downstream port. But there is no
documentation describing how these relate.

Thus add documentation to describe EXTCON_CHG_USB_SDP should always
appear together with EXTCON_USB, and EXTCON_CHG_USB_ACA would normally
appear with EXTCON_USB_HOST.

Signed-off-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
parent 01b4c9a1

include/linux/extcon.h

+8 −1
Original line number Diff line number Diff line
@@ -46,7 +46,14 @@ 
#define EXTCON_USB		1

#define EXTCON_USB_HOST		2



/* Charging external connector */

/*

 * Charging external connector

 *

 * When one SDP charger connector was reported, we should also report

 * the USB connector, which means EXTCON_CHG_USB_SDP should always

 * appear together with EXTCON_USB. The same as ACA charger connector,

 * EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.

 */

#define EXTCON_CHG_USB_SDP	5	/* Standard Downstream Port */

#define EXTCON_CHG_USB_DCP	6	/* Dedicated Charging Port */

#define EXTCON_CHG_USB_CDP	7	/* Charging Downstream Port */