linux-kernel - [PATCH 1/3] dt-bindings: interrupt-controller: Add Sophgo SG2044 ACLINT SSWI

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Message-ID: <20241004080557.2262872-2-inochiama@gmail.com>
Date: Fri,  4 Oct 2024 16:05:55 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Chen Wang <unicorn_wang@...look.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Peter Zijlstra <peterz@...radead.org>,
	Inochi Amaoto <inochiama@...look.com>,
	Guo Ren <guoren@...nel.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Hal Feng <hal.feng@...rfivetech.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Yixun Lan <dlan@...too.org>,
	Inochi Amaoto <inochiama@...il.com>,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: [PATCH 1/3] dt-bindings: interrupt-controller: Add Sophgo SG2044 ACLINT SSWI

Sophgo SG2044 has a new version of T-HEAD C920, which implement
a fully featured ACLINT device. This ACLINT has an extra SSWI
field to support fast S-mode IPI.

Add necessary compatible string for the T-HEAD ACLINT sswi device.

Signed-off-by: Inochi Amaoto <inochiama@...il.com>
---
 .../thead,c900-aclint-sswi.yaml               | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-sswi.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-sswi.yaml b/Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-sswi.yaml
new file mode 100644
index 000000000000..0106fbf3ea1f
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/thead,c900-aclint-sswi.yaml
@@ -0,0 +1,58 @@
+# 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: Sophgo sg2044 ACLINT Supervisor-level Software Interrupt Device
+
+maintainers:
+  - Inochi Amaoto <inochiama@...look.com>
+
+description:
+  The SSWI device is a part of the riscv ACLINT device. It provides
+  supervisor-level IPI functionality for a set of HARTs on a RISC-V
+  platform. It provides a register to set an IPI (SETSSIP) for each
+  HART connected to the SSWI device.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - sophgo,sg2044-aclint-sswi
+      - const: thead,c900-aclint-sswi
+
+  reg:
+    maxItems: 1
+
+  "#interrupt-cells":
+    const: 0
+
+  interrupt-controller: true
+
+  interrupts-extended:
+    minItems: 1
+    maxItems: 4095
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - "#interrupt-cells"
+  - interrupt-controller
+  - interrupts-extended
+
+examples:
+  - |
+    interrupt-controller@...00000 {
+      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>;
+    };
+...
--
2.46.2