From: Baolin Wang Date: Wed, 21 Dec 2016 06:10:47 +0000 (+0800) Subject: extcon: Add documentation for EXTCON_CHG_USB_* and EXTCON_USB_* X-Git-Tag: v4.14-rc1~1457^2~100^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=db6228612ce297949621a62e9d2331ee55016778;p=platform%2Fkernel%2Flinux-rpi.git 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: Baolin Wang Signed-off-by: Chanwoo Choi --- diff --git a/include/linux/extcon.h b/include/linux/extcon.h index b871c0c..0020123 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -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 */