Commit db622861 authored by Baolin Wang's avatar Baolin Wang Committed by Chanwoo Choi

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
......@@ -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 */
......
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