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Commit f651c73e authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
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dt-bindings: usb: add binding for USB GPIO based connection detection driver 



It's used to support dual role switch via GPIO when use Type-B
receptacle, typically the USB ID pin is connected to an input
GPIO, and also used to enable/disable device when the USB Vbus
pin is connected to an input GPIO.

Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1567070558-29417-4-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6b68240d

Documentation/devicetree/bindings/usb/usb-conn-gpio.txt

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+30 −0
Original line number Diff line number Diff line 
USB GPIO Based Connection Detection



This is typically used to switch dual role mode from the USB ID pin connected

to an input GPIO, and also used to enable/disable device mode from the USB

Vbus pin connected to an input GPIO.



Required properties:

- compatible : should include "gpio-usb-b-connector" and "usb-b-connector".

- id-gpios, vbus-gpios : input gpios, either one of them must be present,

	and both can be present as well.

	see connector/usb-connector.txt



Optional properties:

- vbus-supply : can be present if needed when supports dual role mode.

	see connector/usb-connector.txt



- Sub-nodes:

	- port : can be present.

		see graph.txt



Example:



&mtu3 {

	connector {

		compatible = "gpio-usb-b-connector", "usb-b-connector";

		type = "micro";

		id-gpios = <&pio 12 GPIO_ACTIVE_HIGH>;

		vbus-supply = <&usb_p0_vbus>;

	};

};