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authorBenson Leung <bleung@chromium.org>2017-07-17 11:41:40 +0200
committerChanwoo Choi <cw00.choi@samsung.com>2017-07-17 19:25:55 +0900
commita8a5549fec5229521d12de5c2d7f462f9f7de00e (patch)
treec15ff8016687516169873f62427fc7c27eb1eef5 /Documentation/devicetree/bindings/extcon
parentc698316661096e036b54448039b35e1c2c5809f0 (diff)
dt-bindings: extcon: Add support for cros-ec device
This patch add documentation for binding of USB Type C cable detection mechanism is using EXTCON subsystem. The device can detect the presence of display out but it may also detect other external accessories when external accessories is attached or detached. Signed-off-by: Benson Leung <bleung@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'Documentation/devicetree/bindings/extcon')
-rw-r--r--Documentation/devicetree/bindings/extcon/extcon-usbc-cros-ec.txt24
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/extcon/extcon-usbc-cros-ec.txt b/Documentation/devicetree/bindings/extcon/extcon-usbc-cros-ec.txt
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index 000000000000..8e8625c00dfa
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+++ b/Documentation/devicetree/bindings/extcon/extcon-usbc-cros-ec.txt
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+ChromeOS EC USB Type-C cable and accessories detection
+
+On ChromeOS systems with USB Type C ports, the ChromeOS Embedded Controller is
+able to detect the state of external accessories such as display adapters
+or USB devices when said accessories are attached or detached.
+
+The node for this device must be under a cros-ec node like google,cros-ec-spi
+or google,cros-ec-i2c.
+
+Required properties:
+- compatible: Should be "google,extcon-usbc-cros-ec".
+- google,usb-port-id: Specifies the USB port ID to use.
+
+Example:
+ cros-ec@0 {
+ compatible = "google,cros-ec-i2c";
+
+ ...
+
+ extcon {
+ compatible = "google,extcon-usbc-cros-ec";
+ google,usb-port-id = <0>;
+ };
+ }