On Thu, Aug 27, 2020 at 12:14:00AM +0530, Manish Narani wrote:
> Add documentation for Versal DWC3 controller. Add required property
> 'reg' for the same. Also add optional properties for snps,dwc3.
>
> Signed-off-by: Manish Narani <manish.nar...@xilinx.com>
> ---
> .../devicetree/bindings/usb/dwc3-xilinx.txt | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt
> b/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt
> index 4aae5b2cef56..dd41ed831411 100644
> --- a/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt
> +++ b/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt
> @@ -1,7 +1,8 @@
> Xilinx SuperSpeed DWC3 USB SoC controller
>
> Required properties:
> -- compatible: Should contain "xlnx,zynqmp-dwc3"
> +- compatible: May contain "xlnx,zynqmp-dwc3" or "xlnx,versal-dwc3"
> +- reg: Base address and length of the register control block
> - clocks: A list of phandles for the clocks listed in clock-names
> - clock-names: Should contain the following:
> "bus_clk" Master/Core clock, have to be >= 125 MHz for SS
> @@ -13,12 +14,19 @@ Required child node:
> A child node must exist to represent the core DWC3 IP block. The name of
> the node is not important. The content of the node is defined in dwc3.txt.
>
> +Optional properties for snps,dwc3:
> +- dma-coherent: Enable this flag if CCI is enabled in design. Adding
> this
> + flag configures Global SoC bus Configuration Register and
> + Xilinx USB 3.0 IP - USB coherency register to enable CCI.
> +- interrupt-names: This property provides the names of the interrupt ids used
You have to define what the names are. 'dwc_usb3' seems pretty pointless
if only 1 name.
> +
> Example device node:
>
> usb@0 {
> #address-cells = <0x2>;
> #size-cells = <0x1>;
> compatible = "xlnx,zynqmp-dwc3";
> + reg = <0x0 0xff9d0000 0x0 0x100>;
> clock-names = "bus_clk" "ref_clk";
> clocks = <&clk125>, <&clk125>;
> ranges;
> @@ -26,7 +34,9 @@ Example device node:
> dwc3@fe200000 {
> compatible = "snps,dwc3";
> reg = <0x0 0xfe200000 0x40000>;
> + interrupt-name = "dwc_usb3";
> interrupts = <0x0 0x41 0x4>;
> dr_mode = "host";
> + dma-coherent;
> };
> };
> --
> 2.17.1
>
