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| author |   Baolin Wang <baolin.wang@linaro.org> | 2016-12-21 14:10:47 +0800 |
|---|---|---|
| committer |   Chanwoo Choi <cw00.choi@samsung.com> | 2017-01-09 10:04:11 +0900 |
| commit | db6228612ce297949621a62e9d2331ee55016778 (patch) | |
| tree | a0818190694e19f0a2a18f2a545922c8886984e0 /include/linux/extcon.h | |
| parent | extcon: Remove potential problem when calling extcon_register_notifier() (diff) | |
| download | wireguard-linux-db6228612ce297949621a62e9d2331ee55016778.tar.xz wireguard-linux-db6228612ce297949621a62e9d2331ee55016778.zip | |
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 <baolin.wang@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'include/linux/extcon.h')
| -rw-r--r-- | include/linux/extcon.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/extcon.h b/include/linux/extcon.h index b871c0cb1f02..00201230bea5 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 */ |