[PATCH v5 1/2] dt-bindings: mailbox: mediatek,mt8196-vcp-mbox: add mtk vcp-mbox document

Jjian Zhou
2025-08-22T07:50:20Z

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.

This adds a binding for Mediatek VCP mailbox.

Signed-off-by: Jjian Zhou <jjian.zhou@mediatek.com>
---
.../mailbox/mediatek,mt8196-vcp-mbox.yaml | 49 +++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mailbox/mediatek,mt8196-vcp-mbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-vcp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-vcp-mbox.yaml
new file mode 100644
index 000000000000..7b1c5165e64e
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-vcp-mbox.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/mediatek,mt8196-vcp-mbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek Video Companion Processor (VCP) mailbox
+
+maintainers:
+ - Jjian Zhou <Jjian.Zhou@mediatek.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>
+
+ mailbox@31b80000 {
+ compatible = "mediatek,mt8196-vcp-mbox";
+ reg = <0x31b80000 0x1000>;
+ interrupts = <GIC_SPI 789 IRQ_TYPE_LEVEL_HIGH 0>;
+ #mbox-cells = <0>;
+ };
--
2.46.0