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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/thead,c900-aclint-sswi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ACLINT Supervisor-level Software Interrupt Device
+
+maintainers:
+  - Inochi Amaoto <inochiama@outlook.com>
+
+description:
+  The SSWI device is a part of the ACLINT device. It provides
+  supervisor-level IPI functionality for a set of HARTs on a supported
+  platforms. It provides a register to set an IPI (SETSSIP) for each
+  HART connected to the SSWI device. See draft specification
+  https://github.com/riscvarchive/riscv-aclint
+
+  Following variants of the SSWI ACLINT supported, using dedicated
+  compatible string
+  - THEAD C900
+  - MIPS P8700
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - sophgo,sg2044-aclint-sswi
+          - const: thead,c900-aclint-sswi
+      - items:
+          - const: mips,p8700-aclint-sswi
+
+  reg:
+    maxItems: 1
+
+  "#interrupt-cells":
+    const: 0
+
+  interrupt-controller: true
+
+  interrupts-extended:
+    minItems: 1
+    maxItems: 4095
+
+  riscv,hart-indexes:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 4095
+    description:
+      A list of hart indexes that APLIC should use to address each hart
+      that is mentioned in the "interrupts-extended"
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - "#interrupt-cells"
+  - interrupt-controller
+  - interrupts-extended
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mips,p8700-aclint-sswi
+    then:
+      required:
+        - riscv,hart-indexes
+    else:
+      properties:
+        riscv,hart-indexes: false
+
+examples:
+  - |
+    //Example 1
+    interrupt-controller@94000000 {
+      compatible = "sophgo,sg2044-aclint-sswi", "thead,c900-aclint-sswi";
+      reg = <0x94000000 0x00004000>;
+      #interrupt-cells = <0>;
+      interrupt-controller;
+      interrupts-extended = <&cpu1intc 1>,
+                            <&cpu2intc 1>,
+                            <&cpu3intc 1>,
+                            <&cpu4intc 1>;
+    };
+
+  - |
+    //Example 2
+    interrupt-controller@94000000 {
+      compatible = "mips,p8700-aclint-sswi";
+      reg = <0x94000000 0x00004000>;
+      #interrupt-cells = <0>;
+      interrupt-controller;
+      interrupts-extended = <&cpu1intc 1>,
+                            <&cpu2intc 1>,
+                            <&cpu3intc 1>,
+                            <&cpu4intc 1>;
+      riscv,hart-indexes = <0x0 0x1 0x10 0x11>;
+    };
+
+...