linux-kernel - [PATCH 1/2] dt-bindings: usb: dwc3-xilinx: Add documentation for Versal DWC3 Controller

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Date:   Thu, 27 Aug 2020 00:14:00 +0530
From:   Manish Narani <manish.narani@...inx.com>
To:     gregkh@...uxfoundation.org, robh+dt@...nel.org,
        michal.simek@...inx.com, balbi@...nel.org, p.zabel@...gutronix.de
Cc:     linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        git@...inx.com, Manish Narani <manish.narani@...inx.com>
Subject: [PATCH 1/2] dt-bindings: usb: dwc3-xilinx: Add documentation for Versal DWC3 Controller

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@...inx.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
+
 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@...00000 {
 				compatible = "snps,dwc3";
 				reg = <0x0 0xfe200000 0x40000>;
+				interrupt-name = "dwc_usb3";
 				interrupts = <0x0 0x41 0x4>;
 				dr_mode = "host";
+				dma-coherent;
 			};
 		};
-- 
2.17.1