dt-bindings: arm: hisilicon: convert system controller bindings to json-schema

Convert the Hisilicon system controller and its variants 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/20200929141454.2312-11-thunder.leizhen@huawei.comSigned-off-by: Rob Herring <robh@kernel.org>

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

-Hisilicon Hi6220 system controller
-
-Required properties:
-- compatible : "hisilicon,hi6220-sysctrl"
-- 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 controller as one of the system controllers,
-its main functions are the same as Hisilicon system controller, but
-the register offset of some core modules are different.
-
-Example:
-	/*for Hi6220*/
-	sys_ctrl: sys_ctrl@f7030000 {
-		compatible = "hisilicon,hi6220-sysctrl", "syscon";
-		reg = <0x0 0xf7030000 0x0 0x2000>;
-		#clock-cells = <1>;
-	};

Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,hip01-sysctrl.txt

-Hisilicon HiP01 system controller
-
-Required properties:
-- compatible : "hisilicon,hip01-sysctrl"
-- reg : Register address and size
-
-The HiP01 system controller is mostly compatible with hisilicon
-system controller,but it has some specific control registers for
-HIP01 SoC family, such as slave core boot, and also some same
-registers located at different offset.
-
-Example:
-
-	/* for hip01-ca9x2 */
-	sysctrl: system-controller@10000000 {
-		compatible = "hisilicon,hip01-sysctrl", "hisilicon,sysctrl";
-		reg = <0x10000000 0x1000>;
-		reboot-offset = <0x4>;
-	};

Documentation/devicetree/bindings/arm/hisilicon/controller/hisilicon,sysctrl.txt

-Hisilicon system controller
-
-Required properties:
-- compatible : "hisilicon,sysctrl"
-- reg : Register address and size
-
-Optional properties:
-- smp-offset : offset in sysctrl for notifying slave cpu booting
-		cpu 1, reg;
-		cpu 2, reg + 0x4;
-		cpu 3, reg + 0x8;
-		If reg value is not zero, cpun exit wfi and go
-- resume-offset : offset in sysctrl for notifying cpu0 when resume
-- reboot-offset : offset in sysctrl for system reboot
-
-Example:
-
-	/* for Hi3620 */
-	sysctrl: system-controller@fc802000 {
-		compatible = "hisilicon,sysctrl";
-		reg = <0xfc802000 0x1000>;
-		smp-offset = <0x31c>;
-		resume-offset = <0x308>;
-		reboot-offset = <0x4>;
-	};

Documentation/devicetree/bindings/arm/hisilicon/controller/sysctrl.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/hisilicon/controller/sysctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Hisilicon system controller
+
+maintainers:
+  - Wei Xu <xuwei5@hisilicon.com>
+
+description: |
+  The Hisilicon system controller is used on many Hisilicon boards, it can be
+  used to assist the slave core startup, reboot the system, etc.
+
+  There are some variants of the Hisilicon system controller, such as HiP01,
+  Hi3519, Hi6220 system controller, each of them is mostly compatible with the
+  Hisilicon system controller, but some same registers located at different
+  offset. In addition, the HiP01 system controller has some specific control
+  registers for HIP01 SoC family, such as slave core boot.
+
+  The compatible names of each system controller are as follows:
+  Hisilicon system controller   --> hisilicon,sysctrl
+  HiP01     system controller   --> hisilicon,hip01-sysctrl
+  Hi6220    system controller   --> hisilicon,hi6220-sysctrl
+  Hi3519    system controller   --> hisilicon,hi3519-sysctrl
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: hisilicon,hi6220-sysctrl
+    then:
+      required:
+        - '#clock-cells'
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - hisilicon,sysctrl
+              - hisilicon,hi6220-sysctrl
+              - hisilicon,hi3519-sysctrl
+          - const: syscon
+      - items:
+          - const: hisilicon,hip01-sysctrl
+          - const: hisilicon,sysctrl
+
+  reg:
+    maxItems: 1
+
+  smp-offset:
+    description: |
+      offset in sysctrl for notifying slave cpu booting
+      cpu 1, reg;
+      cpu 2, reg + 0x4;
+      cpu 3, reg + 0x8;
+      If reg value is not zero, cpun exit wfi and go
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  resume-offset:
+    description: offset in sysctrl for notifying cpu0 when resume
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  reboot-offset:
+    description: offset in sysctrl for system reboot
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  '#clock-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    /* Hisilicon system controller */
+    system-controller@fc802000 {
+        compatible = "hisilicon,sysctrl", "syscon";
+        reg = <0xfc802000 0x1000>;
+        smp-offset = <0x31c>;
+        resume-offset = <0x308>;
+        reboot-offset = <0x4>;
+    };
+
+    /* HiP01 system controller */
+    system-controller@10000000 {
+        compatible = "hisilicon,hip01-sysctrl", "hisilicon,sysctrl";
+        reg = <0x10000000 0x1000>;
+        reboot-offset = <0x4>;
+    };
+
+    /* Hi6220 system controller */
+    system-controller@f7030000 {
+        compatible = "hisilicon,hi6220-sysctrl", "syscon";
+        reg = <0xf7030000 0x2000>;
+        #clock-cells = <1>;
+    };
+
+    /* Hi3519 system controller */
+    system-controller@12010000 {
+        compatible = "hisilicon,hi3519-sysctrl", "syscon";
+        reg = <0x12010000 0x1000>;
+    };
+...

Documentation/devicetree/bindings/arm/hisilicon/hi3519-sysctrl.txt

-* Hisilicon Hi3519 System Controller Block
-
-This bindings use the following binding:
-Documentation/devicetree/bindings/mfd/syscon.yaml
-
-Required properties:
-- compatible: "hisilicon,hi3519-sysctrl".
-- reg: the register region of this block
-
-Examples:
-sysctrl: system-controller@12010000 {
-	compatible = "hisilicon,hi3519-sysctrl", "syscon";
-	reg = <0x12010000 0x1000>;
-};