dt-bindings: interrupt-controller: aspeed,ast2400-vic: Convert to DT schema

Squash warnings such as:

arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-galaxy100.dtb: /ahb/interrupt-controller@1e6c0080: failed to match any schema with compatible: ['aspeed,ast2400-vic']

The YAML DT schema defines an optional property, valid-sources, which
was not previously described in the prose binding. It is added to
document existing practice in the Aspeed devicetrees. Unfortunately
the property seems to predate the requirement that vendor-specific
properties be prefixed.

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

Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2400-vic.txt

···
-Aspeed Vectored Interrupt Controller
-
-These bindings are for the Aspeed interrupt controller. The AST2400 and
-AST2500 SoC families include a legacy register layout before a re-designed
-layout, but the bindings do not prescribe the use of one or the other.
-
-Required properties:
-
-- compatible : "aspeed,ast2400-vic"
-               "aspeed,ast2500-vic"
-
-- 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 1.
-
-Example:
-
- vic: interrupt-controller@1e6c0080 {
-      compatible = "aspeed,ast2400-vic";
-      interrupt-controller;
-      #interrupt-cells = <1>;
-      reg = <0x1e6c0080 0x80>;
- };

Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2400-vic.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/aspeed,ast2400-vic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Aspeed Vectored Interrupt Controller
+
+maintainers:
+  - Andrew Jeffery <[e-mail]>
+
+description:
+  The AST2400 and AST2500 SoC families include a legacy register layout before
+  a redesigned layout, but the bindings do not prescribe the use of one or the
+  other.
+
+properties:
+  compatible:
+    enum:
+      - aspeed,ast2400-vic
+      - aspeed,ast2500-vic
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 1
+    description:
+      Specifies the number of cells needed to encode an interrupt source. It
+      must be 1 as the VIC has no configuration options for interrupt sources.
+      The single cell defines the interrupt number.
+
+  valid-sources:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    maxItems: 2
+    description:
+      A bitmap of supported sources for the implementation.
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - "#interrupt-cells"
+
+allOf:
+  - $ref: /schemas/interrupt-controller.yaml
+
+additionalProperties: false
+
+examples:
+  - |
+    interrupt-controller@1e6c0080 {
+         compatible = "aspeed,ast2400-vic";
+         reg = <0x1e6c0080 0x80>;
+         interrupt-controller;
+         #interrupt-cells = <1>;
+         valid-sources = <0xffffffff 0x0007ffff>;
+    };
+
+...