On Thu, Apr 26, 2018 at 08:26:41PM +0900, Yoshihiro Shimoda wrote:
> This patch adds a new documentation for Renesas R-Car USB 3.0 role
> switch that can change the USB 3.0 role to either host or peripheral
> by a hardware register that is included in USB3.0 peripheral module.
>
> Signed-off-by: Yoshihiro Shimoda <[email protected]>
> ---
> .../bindings/usb/renesas,rcar-usb3-role-sw.txt | 47
> ++++++++++++++++++++++
> 1 file changed, 47 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/usb/renesas,rcar-usb3-role-sw.txt
>
> diff --git
> a/Documentation/devicetree/bindings/usb/renesas,rcar-usb3-role-sw.txt
> b/Documentation/devicetree/bindings/usb/renesas,rcar-usb3-role-sw.txt
> new file mode 100644
> index 0000000..e074c03
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/renesas,rcar-usb3-role-sw.txt
> @@ -0,0 +1,47 @@
> +Renesas Electronics R-Car USB 3.0 role switch
> +
> +A renesas_usb3's node can contain this node.
> +
> +Required properties:
> + - compatible: Must contain "renesas,rcar-usb3-role-switch".
> +
> +Required nodes:
> + - The connection to a usb3.0 host node needs by using OF graph bindings.
> + - port@0 = USB 3.0 host port
> + - port@1 = USB 3.0 peripheral port
> +
> +Example of R-Car H3 ES2.0:
> + usb3_peri0: usb@ee020000 {
> + compatible = "renesas,r8a7795-usb3-peri",
> + "renesas,rcar-gen3-usb3-peri";
> + reg = <0 0xee020000 0 0x400>;
> + interrupts = <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&cpg CPG_MOD 328>;
> + power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> + resets = <&cpg 328>;
> +
> + usb3-role-sw {
> + compatible = "renesas,rcar-usb3-role-switch";
You don't define any h/w resources. How is this device accessed?
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> +
> + usb3_host_sw: endpoint {
> + remote-endpoint =
> <&usb3_host_ep>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> +
> + usb3_peri_sw: endpoint {
> + remote-endpoint =
> <&usb3_peri_ep>;
> + };
> + };
> + };
> + };
> + };
> --
> 1.9.1
>
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