dt-bindings: interrupt-controller: convert loongson,ls1x-intc.txt to json-schema

Convert the Loongson1 interrupt controller dt-bindings to json-schema.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230221102545.2103632-1-keguang.zhang@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/loongson,ls1x-intc.txt

@@ -1,24 +0,0 @@
-Loongson ls1x Interrupt Controller
-
-Required properties:
-
-- compatible : should be "loongson,ls1x-intc". Valid strings are:
-
-- reg : Specifies base physical address and size of the registers.
-- interrupt-controller : Identifies the node as an interrupt controller
-- #interrupt-cells : Specifies the number of cells needed to encode an
-  interrupt source. The value shall be 2.
-- interrupts : Specifies the CPU interrupt the controller is connected to.
-
-Example:
-
-intc: interrupt-controller@1fd01040 {
-	compatible = "loongson,ls1x-intc";
-	reg = <0x1fd01040 0x18>;
-
-	interrupt-controller;
-	#interrupt-cells = <2>;
-
-	interrupt-parent = <&cpu_intc>;
-	interrupts = <2>;
-};

Documentation/devicetree/bindings/interrupt-controller/loongson,ls1x-intc.yaml

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/loongson,ls1x-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson-1 Interrupt Controller
+
+maintainers:
+  - Keguang Zhang <keguang.zhang@gmail.com>
+
+description:
+  Loongson-1 interrupt controller is connected to the MIPS core interrupt
+  controller, which controls several groups of interrupts.
+
+properties:
+  compatible:
+    const: loongson,ls1x-intc
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - '#interrupt-cells'
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    intc0: interrupt-controller@1fd01040 {
+        compatible = "loongson,ls1x-intc";
+        reg = <0x1fd01040 0x18>;
+
+        interrupt-controller;
+        #interrupt-cells = <2>;
+
+        interrupt-parent = <&cpu_intc>;
+        interrupts = <2>;
+    };