linux-kernel - [PATCH RFC 3/3] dt-bindings: mailbox: mtk,vcp-mbox: add mtk vcp-mbox document

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Message-ID: <20250305082047.15746-4-jjian.zhou@mediatek.com>
Date: Wed, 5 Mar 2025 16:20:40 +0800
From: Jjian Zhou <jjian.zhou@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>, Jason-ch Chen
	<jason-ch.chen@...iatek.com>, Jjian Zhou <jjian.zhou@...iatek.com>
Subject: [PATCH RFC 3/3] dt-bindings: mailbox: mtk,vcp-mbox: add mtk vcp-mbox document

This patch adds document for mediatek vcp mbox.

Signed-off-by: Jjian Zhou <jjian.zhou@...iatek.com>
---
 .../bindings/mailbox/mtk,vcp-mbox.yaml        | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/mtk,vcp-mbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/mtk,vcp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/mtk,vcp-mbox.yaml
new file mode 100644
index 000000000000..d5afe295af14
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/mtk,vcp-mbox.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/mtk,vcp-mbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek Video Companion Processor (VCP) mailbox
+
+maintainers:
+  - Jjian Zhou <Jjian.Zhou@...iatek.com>
+
+description: |
+  The MTK VCP mailbox enables the SoC to communicate with the VCP by passing
+  messages through 64 32-bit wide registers. It has 32 interrupt vectors in
+  either direction for signalling purposes.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt8196-vcp-mbox
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#mbox-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#mbox-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    vcp_mailbox0: mailbox@...80000 {
+        compatible = "mediatek,mt8196-vcp-mbox";
+        reg = <0x31b80000 0x1000>;
+        interrupts = <GIC_SPI 789 IRQ_TYPE_LEVEL_HIGH 0>;
+        #mbox-cells = <0>;
+    };
-- 
2.45.2