dt-bindings: interrupt-controller: Add starfive,jh8100-intc

StarFive SoCs like the JH8100 use a interrupt controller. Add a binding
for it.

Signed-off-by: Changhuang Liang <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Reviewed-by: Ley Foon Tan <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/devicetree/bindings/interrupt-controller/starfive,jh8100-intc.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/starfive,jh8100-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive External Interrupt Controller
+
+description:
+  StarFive SoC JH8100 contain a external interrupt controller. It can be used
+  to handle high-level input interrupt signals. It also send the output
+  interrupt signal to RISC-V PLIC.
+
+maintainers:
+  - Changhuang Liang <[e-mail]>
+
+properties:
+  compatible:
+    const: starfive,jh8100-intc
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    description: APB clock for the interrupt controller
+    maxItems: 1
+
+  resets:
+    description: APB reset for the interrupt controller
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+  - interrupts
+  - interrupt-controller
+  - "#interrupt-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    interrupt-controller@12260000 {
+      compatible = "starfive,jh8100-intc";
+      reg = <0x12260000 0x10000>;
+      clocks = <&syscrg_ne 76>;
+      resets = <&syscrg_ne 13>;
+      interrupts = <45>;
+      interrupt-controller;
+      #interrupt-cells = <1>;
+    };