dt-bindings: usb: dwc3-xilinx: Convert USB DWC3 bindings

Convert USB DWC3 bindings to DT schema format using json-schema.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Link: https://lore.kernel.org/r/1638808021-26921-1-git-send-email-manish.narani@xilinx.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/dwc3-xilinx.txt

-Xilinx SuperSpeed DWC3 USB SoC controller
-
-Required properties:
-- 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>;
-				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;
-			};
-		};

Documentation/devicetree/bindings/usb/dwc3-xilinx.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/dwc3-xilinx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx SuperSpeed DWC3 USB SoC controller
+
+maintainers:
+  - Manish Narani <manish.narani@xilinx.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - xlnx,zynqmp-dwc3
+          - xlnx,versal-dwc3
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    enum: [ 1, 2 ]
+
+  "#size-cells":
+    enum: [ 1, 2 ]
+
+  ranges: true
+
+  power-domains:
+    description: specifies a phandle to PM domain provider node
+    maxItems: 1
+
+  clocks:
+    description:
+      A list of phandle and clock-specifier pairs for the clocks
+      listed in clock-names.
+    items:
+      - description: Master/Core clock, has to be >= 125 MHz
+          for SS operation and >= 60MHz for HS operation.
+      - description: Clock source to core during PHY power down.
+
+  clock-names:
+    items:
+      - const: bus_clk
+      - const: ref_clk
+
+  resets:
+    description:
+      A list of phandles for resets listed in reset-names.
+
+    items:
+      - description: USB core reset
+      - description: USB hibernation reset
+      - description: USB APB reset
+
+  reset-names:
+    items:
+      - const: usb_crst
+      - const: usb_hibrst
+      - const: usb_apbrst
+
+  phys:
+    minItems: 1
+    maxItems: 2
+
+  phy-names:
+    minItems: 1
+    maxItems: 2
+    items:
+      enum:
+        - usb2-phy
+        - usb3-phy
+
+# Required child node:
+
+patternProperties:
+  "^usb@[0-9a-f]+$":
+    $ref: snps,dwc3.yaml#
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+  - power-domains
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/dma/xlnx-zynqmp-dpdma.h>
+    #include <dt-bindings/power/xlnx-zynqmp-power.h>
+    #include <dt-bindings/reset/xlnx-zynqmp-resets.h>
+    #include <dt-bindings/clock/xlnx-zynqmp-clk.h>
+    #include <dt-bindings/reset/xlnx-zynqmp-resets.h>
+    #include <dt-bindings/phy/phy.h>
+    axi {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        usb@0 {
+            #address-cells = <0x2>;
+            #size-cells = <0x2>;
+            compatible = "xlnx,zynqmp-dwc3";
+            reg = <0x0 0xff9d0000 0x0 0x100>;
+            clocks = <&zynqmp_clk USB0_BUS_REF>, <&zynqmp_clk USB3_DUAL_REF>;
+            clock-names = "bus_clk", "ref_clk";
+            power-domains = <&zynqmp_firmware PD_USB_0>;
+            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";
+            phys = <&psgtr 2 PHY_TYPE_USB3 0 2>;
+            phy-names = "usb3-phy";
+            ranges;
+
+            usb@fe200000 {
+                compatible = "snps,dwc3";
+                reg = <0x0 0xfe200000 0x0 0x40000>;
+                interrupt-names = "host", "otg";
+                interrupts = <0 65 4>, <0 69 4>;
+                dr_mode = "host";
+                dma-coherent;
+            };
+        };
+    };