This patch adds a new documentation for a usb role switch driver.
The usb role switch framework will parse this to get each device
pointer by using each remote-endpoint.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
.../devicetree/bindings/usb/usb-role-switch.txt | 42 ++++++++++++++++++++++
1 file changed, 42 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/usb-role-switch.txt
diff --git a/Documentation/devicetree/bindings/usb/usb-role-switch.txt b/Documentation/devicetree/bindings/usb/usb-role-switch.txt
new file mode 100644
index 0000000..941d582
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/usb-role-switch.txt
@@ -0,0 +1,42 @@
+USB role switch driver
+
+Optional nodes:
+- If a role switch driver has OF graph ports, the usb role switch framework
+ will parse the remote-endpoints in usb_role_switch_register(). The OF graph
+ port number as follows:
+ 0: USB 2.0 host port
+ 1: USB 3.0 host port
+ 2: UDC port
+
+For example:
+ usb-role-sw {
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ usb2_host_sw0: endpoint {
+ remote-endpoint = <&usb2_host_ep0>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ usb3_host_sw0: endpoint {
+ remote-endpoint = <&usb3_host_ep0>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ udc_sw0: endpoint {
+ remote-endpoint = <&udc_ep0>;
+ };
+ };
+ };
+ };
--
1.9.1
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