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.narani@xxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
---
.../devicetree/bindings/usb/dwc3-xilinx.txt | 28 ++++++++++++++++++++--
1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt b/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt
index a668f43..04813a4 100644
--- a/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3-xilinx.txt
@@ -1,32 +1,56 @@
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
operation and >= 60MHz for HS operation
"ref_clk" Clock source to core during PHY power down
+- resets: A list of phandles for resets listed in reset-names
+- reset-names:
+ "usb_crst" USB core reset
+ "usb_hibrst" USB hibernation reset
+ "usb_apbrst" USB APB reset
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: Should contain the following:
+ "dwc_usb3" USB gadget mode interrupts
+ "otg" USB OTG mode interrupts
+ "hiber" USB hibernation interrupts
+
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>;
+ resets = <&zynqmp_reset ZYNQMP_RESET_USB1_CORERESET>,
+ <&zynqmp_reset ZYNQMP_RESET_USB1_HIBERRESET>,
+ <&zynqmp_reset ZYNQMP_RESET_USB1_APB>;
+ reset-names = "usb_crst", "usb_hibrst", "usb_apbrst";
ranges;
dwc3@fe200000 {
compatible = "snps,dwc3";
reg = <0x0 0xfe200000 0x40000>;
- interrupts = <0x0 0x41 0x4>;
+ interrupt-names = "dwc_usb3", "otg", "hiber";
+ interrupts = <0 65 4>, <0 69 4>, <0 75 4>;
+ phys = <&psgtr 2 PHY_TYPE_USB3 0 2>;
+ phy-names = "usb3-phy";
dr_mode = "host";
+ dma-coherent;
};
};
--
2.1.1
