dt-bindings: clock: Convert ingenic,cgu.txt to YAML

Convert the ingenic,cgu.txt doc file to ingenic,cgu.yaml.

The binding documentation has been updated as well. The node can have a
child node that corresponds to the USB PHY, which happens to be present
in the middle of the CGU registers.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/clock/ingenic,cgu.txt

-Ingenic SoC CGU binding
-
-The CGU in an Ingenic SoC provides all the clocks generated on-chip. It
-typically includes a variety of PLLs, multiplexers, dividers & gates in order
-to provide many different clock signals derived from only 2 external source
-clocks.
-
-Required properties:
-- compatible : Should be one of:
-  * ingenic,jz4740-cgu
-  * ingenic,jz4725b-cgu
-  * ingenic,jz4770-cgu
-  * ingenic,jz4780-cgu
-  * ingenic,x1000-cgu
-- reg : The address & length of the CGU registers.
-- clocks : List of phandle & clock specifiers for clocks external to the CGU.
-  Two such external clocks should be specified - first the external crystal
-  "ext" and second the RTC clock source "rtc".
-- clock-names : List of name strings for the external clocks.
-- #clock-cells: Should be 1.
-  Clock consumers specify this argument to identify a clock. The valid values
-  may be found in <dt-bindings/clock/<soctype>-cgu.h>.
-
-Example SoC include file:
-
-/ {
-	cgu: jz4740-cgu {
-		compatible = "ingenic,jz4740-cgu";
-		reg = <0x10000000 0x100>;
-		#clock-cells = <1>;
-	};
-
-	uart0: serial@10030000 {
-		clocks = <&cgu JZ4740_CLK_UART0>;
-	};
-};
-
-Example board file:
-
-/ {
-	ext: clock@0 {
-		compatible = "fixed-clock";
-		#clock-cells = <0>;
-		clock-frequency = <12000000>;
-	};
-
-	rtc: clock@1 {
-		compatible = "fixed-clock";
-		#clock-cells = <0>;
-		clock-frequency = <32768>;
-	};
-
-	&cgu {
-		clocks = <&ext> <&rtc>;
-		clock-names: "ext", "rtc";
-	};
-};

Documentation/devicetree/bindings/clock/ingenic,cgu.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/ingenic,cgu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ingenic SoCs CGU devicetree bindings
+
+description: |
+  The CGU in an Ingenic SoC provides all the clocks generated on-chip. It
+  typically includes a variety of PLLs, multiplexers, dividers & gates in order
+  to provide many different clock signals derived from only 2 external source
+  clocks.
+
+maintainers:
+  - Paul Cercueil <paul@crapouillou.net>
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - ingenic,jz4740-cgu
+          - ingenic,jz4725b-cgu
+          - ingenic,jz4770-cgu
+          - ingenic,jz4780-cgu
+          - ingenic,x1000-cgu
+  required:
+    - compatible
+
+properties:
+  $nodename:
+    pattern: "^clock-controller@[0-9a-f]+$"
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  "#clock-cells":
+    const: 1
+
+  ranges: true
+
+  compatible:
+    items:
+      - enum:
+        - ingenic,jz4740-cgu
+        - ingenic,jz4725b-cgu
+        - ingenic,jz4770-cgu
+        - ingenic,jz4780-cgu
+        - ingenic,x1000-cgu
+      - const: simple-mfd
+    minItems: 1
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: External oscillator clock
+      - description: Internal 32 kHz RTC clock
+
+  clock-names:
+    items:
+      - const: ext
+      - enum:
+        - rtc
+        - osc32k # Different name, same clock
+
+  assigned-clocks:
+    minItems: 1
+    maxItems: 64
+
+  assigned-clock-parents:
+    minItems: 1
+    maxItems: 64
+
+  assigned-clock-rates:
+    minItems: 1
+    maxItems: 64
+
+required:
+  - "#clock-cells"
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+patternProperties:
+  "^usb-phy@[a-f0-9]+$":
+    allOf: [ $ref: "../usb/ingenic,jz4770-phy.yaml#" ]
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/jz4770-cgu.h>
+    cgu: clock-controller@10000000 {
+      compatible = "ingenic,jz4770-cgu", "simple-mfd";
+      reg = <0x10000000 0x100>;
+      #address-cells = <1>;
+      #size-cells = <1>;
+      ranges = <0x0 0x10000000 0x100>;
+
+      clocks = <&ext>, <&osc32k>;
+      clock-names = "ext", "osc32k";
+
+      #clock-cells = <1>;
+
+      otg_phy: usb-phy@3c {
+        compatible = "ingenic,jz4770-phy";
+        reg = <0x3c 0x10>;
+
+        clocks = <&cgu JZ4770_CLK_OTG_PHY>;
+
+        vcc-supply = <&ldo5>;
+
+        #phy-cells = <0>;
+      };
+    };