dt-bindings: interrupt-controller: Convert csky,apb-intc to DT schema

Convert the C-SKY APB interrupt controller binding to schema format.
It's a straight-forward conversion of the typical interrupt controller.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring (Arm) <[e-mail]>

Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt

···
-==============================
-C-SKY APB Interrupt Controller
-==============================
-
-C-SKY APB Interrupt Controller is a simple soc interrupt controller
-on the apb bus and we only use it as root irq controller.
-
- - csky,apb-intc is used in a lot of csky fpgas and socs, it support 64 irq nums.
- - csky,dual-apb-intc consists of 2 apb-intc and 128 irq nums supported.
- - csky,gx6605s-intc is gx6605s soc internal irq interrupt controller, 64 irq nums.
-
-=============================
-intc node bindings definition
-=============================
-
-	Description: Describes APB interrupt controller
-
-	PROPERTIES
-
-	- compatible
-		Usage: required
-		Value type: <string>
-		Definition: must be "csky,apb-intc"
-				    "csky,dual-apb-intc"
-				    "csky,gx6605s-intc"
-	- #interrupt-cells
-		Usage: required
-		Value type: <u32>
-		Definition: must be <1>
-	- reg
-		Usage: required
-		Value type: <u32 u32>
-		Definition: <phyaddr size> in soc from cpu view
-	- interrupt-controller:
-		Usage: required
-	- csky,support-pulse-signal:
-		Usage: select
-		Description: to support pulse signal flag
-
-Examples:
----------
-
-	intc: interrupt-controller@500000 {
-		compatible = "csky,apb-intc";
-		#interrupt-cells = <1>;
-		reg = <0x00500000 0x400>;
-		interrupt-controller;
-	};
-
-	intc: interrupt-controller@500000 {
-		compatible = "csky,dual-apb-intc";
-		#interrupt-cells = <1>;
-		reg = <0x00500000 0x400>;
-		interrupt-controller;
-	};
-
-	intc: interrupt-controller@500000 {
-		compatible = "csky,gx6605s-intc";
-		#interrupt-cells = <1>;
-		reg = <0x00500000 0x400>;
-		interrupt-controller;
-	};

Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/csky,apb-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: C-SKY APB Interrupt Controller
+
+maintainers:
+  - Guo Ren <[e-mail]>
+
+description: >
+  C-SKY APB Interrupt Controller is a simple soc interrupt controller on the apb
+  bus and we only use it as root irq controller.
+
+    - csky,apb-intc is used in a lot of csky fpgas and socs, it support 64 irq nums.
+    - csky,dual-apb-intc consists of 2 apb-intc and 128 irq nums supported.
+    - csky,gx6605s-intc is gx6605s soc internal irq interrupt controller, 64 irq nums.
+
+properties:
+  compatible:
+    enum:
+      - csky,apb-intc
+      - csky,dual-apb-intc
+      - csky,gx6605s-intc
+
+  reg:
+    maxItems: 1
+
+  '#interrupt-cells':
+    const: 1
+
+  interrupt-controller: true
+
+  csky,support-pulse-signal:
+    type: boolean
+    description: Support for pulse signal flag.
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - '#interrupt-cells'
+  - interrupt-controller
+
+examples:
+  - |
+    intc: interrupt-controller@500000 {
+        compatible = "csky,apb-intc";
+        #interrupt-cells = <1>;
+        reg = <0x00500000 0x400>;
+        interrupt-controller;
+    };