From a41d042757fb36f982413622e890a1c41e043000 Mon Sep 17 00:00:00 2001
From: Chen Wang <unicorn_wang@outlook.com>
Date: Wed, 26 Feb 2025 10:15:01 +0800
Subject: [PATCH] dt-bindings: interrupt-controller: Add Sophgo SG2042 MSI

Add binding for Sophgo SG2042 MSI controller.

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/all/44de02977624be334ba6328acfdbb2a375f2071f.1740535748.git.unicorn_wang@outlook.com
---
 .../sophgo,sg2042-msi.yaml                    | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml b/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
new file mode 100644
index 000000000000..e1ffd55fa7bf
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/sophgo,sg2042-msi.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/sophgo,sg2042-msi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo SG2042 MSI Controller
+
+maintainers:
+  - Chen Wang <unicorn_wang@outlook.com>
+
+description:
+  This interrupt controller is in Sophgo SG2042 for transforming interrupts from
+  PCIe MSI to PLIC interrupts.
+
+allOf:
+  - $ref: /schemas/interrupt-controller/msi-controller.yaml#
+
+properties:
+  compatible:
+    const: sophgo,sg2042-msi
+
+  reg:
+    items:
+      - description: clear register
+      - description: msi doorbell address
+
+  reg-names:
+    items:
+      - const: clr
+      - const: doorbell
+
+  msi-controller: true
+
+  msi-ranges:
+    maxItems: 1
+
+  "#msi-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - msi-controller
+  - msi-ranges
+  - "#msi-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    msi-controller@30000000 {
+      compatible = "sophgo,sg2042-msi";
+      reg = <0x30000000 0x4>, <0x30000008 0x4>;
+      reg-names = "clr", "doorbell";
+      msi-controller;
+      #msi-cells = <0>;
+      msi-ranges = <&plic 64 IRQ_TYPE_LEVEL_HIGH 32>;
+    };