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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: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1567070558-29417-4-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2019-08-29 17:22:30 +08:00 committed by Greg Kroah-Hartman
parent 6b68240d7c
commit f651c73e71
1 changed files with 30 additions and 0 deletions
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Documentation/devicetree/bindings/usb/usb-conn-gpio.txt Normal file
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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>;
};
};