linux-kernel - [PATCH v2 2/2] dt-bindings: dsp: fsl: Add DSP IPC binding support

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Date:   Thu, 27 Jun 2019 08:12:20 +0000
From:   Daniel Baluta <daniel.baluta@....com>
To:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "o.rempel@...gutronix.de" <o.rempel@...gutronix.de>
CC:     "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "S.j. Wang" <shengjiu.wang@....com>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        Anson Huang <anson.huang@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH v2 2/2] dt-bindings: dsp: fsl: Add DSP IPC binding support

DSP IPC is the layer that allows the Host CPU to communicate
with DSP firmware.
DSP is part of some i.MX8 boards (e.g i.MX8QM, i.MX8QXP)

Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 .../devicetree/bindings/dsp/fsl,dsp_ipc.yaml  | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dsp/fsl,dsp_ipc.yaml

diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp_ipc.yaml b/Documentation/devicetree/bindings/dsp/fsl,dsp_ipc.yaml
new file mode 100644
index 000000000000..1cbf5d25b258
--- /dev/null
+++ b/Documentation/devicetree/bindings/dsp/fsl,dsp_ipc.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/freescale/fsl,dsp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX8 IPC DSP interface
+
+maintainers:
+  - Daniel Baluta <daniel.baluta@....com>
+
+description: |
+  IPC communication layer between Host CPU and DSP on NXP i.MX8 platforms
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx8qxp-dsp
+
+  mboxes:
+    description:
+      List of <&phandle type channel> - 2 channels for TXDB, 2 channels for RXDB
+      (see mailbox/fsl,mu.txt)
+    maxItems: 4
+
+  mbox-names:
+    items:
+      - const: txdb0
+      - const: txdb1
+      - const: rxdb0
+      - const: rxdb1
+
+required:
+  - compatible
+  - mboxes
+  - mbox-names
+
+examples:
+  - |
+    dsp_ipc {
+      compatbile = "fsl,imx8qxp-dsp";
+      mbox-names = "txdb0", "txdb1", "rxdb0", "rxdb1";
+      mboxes = <&lsio_mu13 2 0>, <&lsio_mu13 2 1>, <&lsio_mu13 3 0>, <&lsio_mu13 3 1>;
+    };
-- 
2.17.1