dt-bindings: phy: phy-stm32-usbphyc: convert bindings to json-schema

Convert the STM32 USB PHY Controller (USBPHYC) bindings to DT schema format
using json-schema.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201116171917.10447-1-amelie.delaunay@st.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.txt

-STMicroelectronics STM32 USB HS PHY controller
-
-The STM32 USBPHYC block contains a dual port High Speed UTMI+ PHY and a UTMI
-switch. It controls PHY configuration and status, and the UTMI+ switch that
-selects either OTG or HOST controller for the second PHY port. It also sets
-PLL configuration.
-
-USBPHYC
-      |_ PLL
-      |
-      |_ PHY port#1 _________________ HOST controller
-      |                    _                 |
-      |                  / 1|________________|
-      |_ PHY port#2 ----|   |________________
-      |                  \_0|                |
-      |_ UTMI switch_______|          OTG controller
-
-
-Phy provider node
-=================
-
-Required properties:
-- compatible: must be "st,stm32mp1-usbphyc"
-- reg: address and length of the usb phy control register set
-- clocks: phandle + clock specifier for the PLL phy clock
-- #address-cells: number of address cells for phys sub-nodes, must be <1>
-- #size-cells: number of size cells for phys sub-nodes, must be <0>
-
-Optional properties:
-- assigned-clocks: phandle + clock specifier for the PLL phy clock
-- assigned-clock-parents: the PLL phy clock parent
-- resets: phandle + reset specifier
-
-Required nodes: one sub-node per port the controller provides.
-
-Phy sub-nodes
-==============
-
-Required properties:
-- reg: phy port index
-- phy-supply: phandle to the regulator providing 3V3 power to the PHY,
-	      see phy-bindings.txt in the same directory.
-- vdda1v1-supply: phandle to the regulator providing 1V1 power to the PHY
-- vdda1v8-supply: phandle to the regulator providing 1V8 power to the PHY
-- #phy-cells: see phy-bindings.txt in the same directory, must be <0> for PHY
-  port#1 and must be <1> for PHY port#2, to select USB controller
-
-
-Example:
-		usbphyc: usb-phy@5a006000 {
-			compatible = "st,stm32mp1-usbphyc";
-			reg = <0x5a006000 0x1000>;
-			clocks = <&rcc_clk USBPHY_K>;
-			resets = <&rcc_rst USBPHY_R>;
-			#address-cells = <1>;
-			#size-cells = <0>;
-
-			usbphyc_port0: usb-phy@0 {
-				reg = <0>;
-				phy-supply = <&vdd_usb>;
-				vdda1v1-supply = <&reg11>;
-				vdda1v8-supply = <&reg18>
-				#phy-cells = <0>;
-			};
-
-			usbphyc_port1: usb-phy@1 {
-				reg = <1>;
-				phy-supply = <&vdd_usb>;
-				vdda1v1-supply = <&reg11>;
-				vdda1v8-supply = <&reg18>
-				#phy-cells = <1>;
-			};
-		};

Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/phy-stm32-usbphyc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32 USB HS PHY controller binding
+
+description:
+
+  The STM32 USBPHYC block contains a dual port High Speed UTMI+ PHY and a UTMI
+  switch. It controls PHY configuration and status, and the UTMI+ switch that
+  selects either OTG or HOST controller for the second PHY port. It also sets
+  PLL configuration.
+
+  USBPHYC
+  |_ PLL
+  |
+  |_ PHY port#1 _________________ HOST controller
+  |                   __                 |
+  |                  / 1|________________|
+  |_ PHY port#2 ----|   |________________
+  |                  \_0|                |
+  |_ UTMI switch_______|          OTG controller
+
+maintainers:
+  - Amelie Delaunay <amelie.delaunay@st.com>
+
+properties:
+  compatible:
+    const: st,stm32mp1-usbphyc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+#Required child nodes:
+
+patternProperties:
+  "^usb-phy@[0|1]$":
+    type: object
+    description:
+      Each port the controller provides must be represented as a sub-node.
+
+    properties:
+      reg:
+        description: phy port index.
+        maxItems: 1
+
+      phy-supply:
+        description: regulator providing 3V3 power supply to the PHY.
+
+      vdda1v1-supply:
+        description: regulator providing 1V1 power supply to the PLL block
+
+      vdda1v8-supply:
+        description: regulator providing 1V8 power supply to the PLL block
+
+      "#phy-cells":
+        enum: [ 0x0, 0x1 ]
+
+    allOf:
+      - if:
+          properties:
+            reg:
+              const: 0
+        then:
+          properties:
+            "#phy-cells":
+              const: 0
+        else:
+          properties:
+            "#phy-cells":
+              const: 1
+              description:
+                The value is used to select UTMI switch output.
+                0 for OTG controller and 1 for Host controller.
+
+    required:
+      - reg
+      - phy-supply
+      - vdda1v1-supply
+      - vdda1v8-supply
+      - "#phy-cells"
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - "#address-cells"
+  - "#size-cells"
+  - usb-phy@0
+  - usb-phy@1
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/stm32mp1-clks.h>
+    #include <dt-bindings/reset/stm32mp1-resets.h>
+    usbphyc: usbphyc@5a006000 {
+        compatible = "st,stm32mp1-usbphyc";
+        reg = <0x5a006000 0x1000>;
+        clocks = <&rcc USBPHY_K>;
+        resets = <&rcc USBPHY_R>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        usbphyc_port0: usb-phy@0 {
+            reg = <0>;
+            phy-supply = <&vdd_usb>;
+            vdda1v1-supply = <&reg11>;
+            vdda1v8-supply = <&reg18>;
+            #phy-cells = <0>;
+        };
+
+        usbphyc_port1: usb-phy@1 {
+            reg = <1>;
+            phy-supply = <&vdd_usb>;
+            vdda1v1-supply = <&reg11>;
+            vdda1v8-supply = <&reg18>;
+            #phy-cells = <1>;
+        };
+    };
+...