It's used to support dual role switch via GPIO when use Type-B
receptacle
Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
v2 changes:
1. new patch to make binding clear suggested by Hans
---
.../bindings/usb/typeb-switch-gpio.txt | 26 +++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/typeb-switch-gpio.txt
diff --git a/Documentation/devicetree/bindings/usb/typeb-switch-gpio.txt b/Documentation/devicetree/bindings/usb/typeb-switch-gpio.txt
new file mode 100644
index 000000000000..d46d83bc6500
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/typeb-switch-gpio.txt
@@ -0,0 +1,26 @@
+USB Type-B dual role switch via a GPIO
+
+This is a virtual device used to switch dual role mode from the USB ID pin
+connected to a GPIO pin.
+
+Required properties:
+- compatible: Should be "linux,typeb-switch-gpio"
+
+Either one of id-gpios or vbus-gpios must be present, and both can be present
+as well.
+vbus-supply could be present if needed when support dual role mode.
+ see connector/usb-connector.txt
+
+Example:
+
+&mtu3 {
+ status = "okay";
+
+ connector@0 {
+ compatible = "usb-b-connector", "linux,typeb-switch-gpio";
+ label = "micro-USB";
+ type = "micro";
+ id-gpio = <&pio 12 GPIO_ACTIVE_HIGH>;
+ vbus-supply = <&usb_p0_vbus>;
+ };
+};
--
2.20.1
