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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>
25 lines
669 B
Plaintext
25 lines
669 B
Plaintext
ChromeOS EC USB Type-C cable and accessories detection
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On ChromeOS systems with USB Type C ports, the ChromeOS Embedded Controller is
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able to detect the state of external accessories such as display adapters
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or USB devices when said accessories are attached or detached.
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The node for this device must be under a cros-ec node like google,cros-ec-spi
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or google,cros-ec-i2c.
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Required properties:
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- compatible: Should be "google,extcon-usbc-cros-ec".
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- google,usb-port-id: Specifies the USB port ID to use.
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Example:
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cros-ec@0 {
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compatible = "google,cros-ec-i2c";
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...
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extcon {
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compatible = "google,extcon-usbc-cros-ec";
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google,usb-port-id = <0>;
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};
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}
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