linux-kernel - [PATCH v18 1/2] dt-bindings: mailbox: mtk,adsp-mbox: add mtk adsp-mbox document

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Message-ID: <20220225132427.29152-2-allen-kh.cheng@mediatek.com>
Date:   Fri, 25 Feb 2022 21:24:26 +0800
From:   Allen-KH Cheng <allen-kh.cheng@...iatek.com>
To:     Jassi Brar <jaswinder.singh@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     Jassi Brar <jassisinghbrar@...il.com>,
        Linux-ALSA <alsa-devel@...a-project.org>, <tzungbi@...gle.com>,
        <cujomalainey@...gle.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        "Mark Brown" <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Kevin Hilman <khilman@...libre.com>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <sound-open-firmware@...a-project.org>,
        Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>
Subject: [PATCH v18 1/2] dt-bindings: mailbox: mtk,adsp-mbox: add mtk adsp-mbox document

From: Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>

This patch adds document for mediatek adsp mbox

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 .../bindings/mailbox/mtk,adsp-mbox.yaml       | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
new file mode 100644
index 000000000000..fe454a1fba17
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/mtk,adsp-mbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek ADSP mailbox
+
+maintainers:
+  - Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>
+
+description: |
+  The MTK ADSP mailbox Inter-Processor Communication (IPC) enables the SoC
+  to ommunicate with ADSP by passing messages through two mailbox channels.
+  The MTK ADSP mailbox IPC also provides the ability for one processor to
+  signal the other processor using interrupts.
+
+properties:
+  compatible:
+    items:
+      - const: mediatek,mt8195-adsp-mbox
+
+  "#mbox-cells":
+    const: 0
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - "#mbox-cells"
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    adsp_mailbox0:mailbox@...16000 {
+        compatible = "mediatek,mt8195-adsp-mbox";
+        #mbox-cells = <0>;
+        reg = <0x10816000 0x1000>;
+        interrupts = <GIC_SPI 702 IRQ_TYPE_LEVEL_HIGH 0>;
+    };
-- 
2.18.0