From f651c73e71f53f65e9846677d79d8e120452b59f Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Thu, 29 Aug 2019 17:22:30 +0800 Subject: [PATCH] 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 Reviewed-by: Linus Walleij Reviewed-by: Rob Herring Link: https://lore.kernel.org/r/1567070558-29417-4-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman --- .../devicetree/bindings/usb/usb-conn-gpio.txt | 30 +++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/usb-conn-gpio.txt diff --git a/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt b/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt new file mode 100644 index 0000000000000..3d05ae56cb0dc --- /dev/null +++ b/Documentation/devicetree/bindings/usb/usb-conn-gpio.txt @@ -0,0 +1,30 @@ +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>; + }; +}; -- 2.30.2