dt-bindings: arm: hisilicon: convert Hi6220 domain controller bindings to json-schema

Convert the Hisilicon Hi6220 domain controllers binding to DT schema
format using json-schema. All of them are grouped into one yaml file, to
help users understand differences and avoid repeated descriptions.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20200930031712.2365-16-thunder.leizhen@huawei.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/hisilicon/controller/hi6220-domain-ctrl.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/hisilicon/controller/hi6220-domain-ctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Hisilicon Hi6220 domain controller
+
+maintainers:
+  - Wei Xu <xuwei5@hisilicon.com>
+
+description: |
+  Hisilicon designs some special domain controllers for mobile platform,
+  such as: the power Always On domain controller, the Media domain
+  controller(e.g. codec, G3D ...) and the Power Management domain
+  controller.
+
+  The compatible names of each domain controller are as follows:
+  Power Always ON domain controller  --> hisilicon,hi6220-aoctrl
+  Media domain controller            --> hisilicon,hi6220-mediactrl
+  Power Management domain controller --> hisilicon,hi6220-pmctrl
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - hisilicon,hi6220-aoctrl
+          - hisilicon,hi6220-mediactrl
+          - hisilicon,hi6220-pmctrl
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    ao_ctrl@f7800000 {
+        compatible = "hisilicon,hi6220-aoctrl", "syscon";
+        reg = <0xf7800000 0x2000>;
+        #clock-cells = <1>;
+        #reset-cells = <1>;
+    };
+
+    media_ctrl@f4410000 {
+        compatible = "hisilicon,hi6220-mediactrl", "syscon";
+        reg = <0xf4410000 0x1000>;
+        #clock-cells = <1>;
+    };
+
+    pm_ctrl@f7032000 {
+        compatible = "hisilicon,hi6220-pmctrl", "syscon";
+        reg = <0xf7032000 0x1000>;
+        #clock-cells = <1>;
+    };
+...

Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hi6220-aoctrl.txt

-Hisilicon Hi6220 Power Always ON domain controller
-
-Required properties:
-- compatible : "hisilicon,hi6220-aoctrl"
-- reg : Register address and size
-- #clock-cells: should be set to 1, many clock registers are defined
-  under this controller and this property must be present.
-
-Hisilicon designs this system controller to control the power always
-on domain for mobile platform.
-
-Example:
-	/*for Hi6220*/
-	ao_ctrl: ao_ctrl@f7800000 {
-		compatible = "hisilicon,hi6220-aoctrl", "syscon";
-		reg = <0x0 0xf7800000 0x0 0x2000>;
-		#clock-cells = <1>;
-	};

Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hi6220-mediactrl.txt

-Hisilicon Hi6220 Media domain controller
-
-Required properties:
-- compatible : "hisilicon,hi6220-mediactrl"
-- reg : Register address and size
-- #clock-cells: should be set to 1, many clock registers are defined
-  under this controller and this property must be present.
-
-Hisilicon designs this system controller to control the multimedia
-domain(e.g. codec, G3D ...) for mobile platform.
-
-Example:
-	/*for Hi6220*/
-	media_ctrl: media_ctrl@f4410000 {
-		compatible = "hisilicon,hi6220-mediactrl", "syscon";
-		reg = <0x0 0xf4410000 0x0 0x1000>;
-		#clock-cells = <1>;
-	};

Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hi6220-pmctrl.txt

-Hisilicon Hi6220 Power Management domain controller
-
-Required properties:
-- compatible : "hisilicon,hi6220-pmctrl"
-- reg : Register address and size
-- #clock-cells: should be set to 1, some clock registers are define
-  under this controller and this property must be present.
-
-Hisilicon designs this system controller to control the power management
-domain for mobile platform.
-
-Example:
-	/*for Hi6220*/
-	pm_ctrl: pm_ctrl@f7032000 {
-		compatible = "hisilicon,hi6220-pmctrl", "syscon";
-		reg = <0x0 0xf7032000 0x0 0x1000>;
-		#clock-cells = <1>;
-	};