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    Subject[PATCH v3 3/7] ASoC: dt-bindings: fsl_rpmsg: Add binding doc for rpmsg cpu dai driver
    Date
    fsl_rpmsg cpu dai driver is driver for rpmsg audio, which is mainly used
    for getting the user's configuration from device tree and configure the
    clocks which is used by Cortex-M core. So in this document define the
    needed property.

    Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
    ---
    .../devicetree/bindings/sound/fsl,rpmsg.yaml | 94 +++++++++++++++++++
    1 file changed, 94 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml

    diff --git a/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
    new file mode 100644
    index 000000000000..ab6d3b8d0d38
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
    @@ -0,0 +1,94 @@
    +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    +%YAML 1.2
    +---
    +$id: http://devicetree.org/schemas/sound/fsl,rpmsg.yaml#
    +$schema: http://devicetree.org/meta-schemas/core.yaml#
    +
    +title: NXP Audio RPMSG CPU DAI Controller
    +
    +maintainers:
    + - Shengjiu Wang <shengjiu.wang@nxp.com>
    +
    +description: |
    + fsl_rpmsg cpu dai driver is virtual driver for rpmsg audio, which doesn't
    + touch hardware. It is mainly used for getting the user's configuration
    + from device tree and configure the clocks which is used by Cortex-M core.
    + So in this document define the needed property.
    +
    +properties:
    + compatible:
    + enum:
    + - fsl,imx7ulp-rpmsg
    + - fsl,imx8mn-rpmsg
    + - fsl,imx8mm-rpmsg
    + - fsl,imx8mp-rpmsg
    +
    + clocks:
    + items:
    + - description: Peripheral clock for register access
    + - description: Master clock
    + - description: DMA clock for DMA register access
    + - description: Parent clock for multiple of 8kHz sample rates
    + - description: Parent clock for multiple of 11kHz sample rates
    + minItems: 5
    +
    + clock-names:
    + items:
    + - const: ipg
    + - const: mclk
    + - const: dma
    + - const: pll8k
    + - const: pll11k
    + minItems: 5
    +
    + power-domains:
    + maxItems: 1
    +
    + fsl,audioindex:
    + $ref: /schemas/types.yaml#/definitions/uint32
    + enum: [0, 1]
    + default: 0
    + description: Instance index for sound card in
    + M core side, which share one rpmsg
    + channel.
    +
    + fsl,version:
    + $ref: /schemas/types.yaml#/definitions/uint32
    + enum: [1, 2]
    + default: 2
    + description: The version of M core image, which is
    + to make driver compatible with different image.
    +
    + fsl,buffer-size:
    + $ref: /schemas/types.yaml#/definitions/uint32
    + description: pre allocate dma buffer size
    +
    + fsl,enable-lpa:
    + $ref: /schemas/types.yaml#/definitions/flag
    + description: enable low power audio path.
    +
    + fsl,codec-type:
    + $ref: /schemas/types.yaml#/definitions/uint32
    + enum: [0, 1, 2]
    + default: 0
    + description: Sometimes the codec is registered by
    + driver not the device tree, this items
    + can be used to distinguish codecs.
    +
    +required:
    + - compatible
    + - fsl,audioindex
    + - fsl,version
    + - fsl,buffer-size
    +
    +additionalProperties: false
    +
    +examples:
    + - |
    + rpmsg_audio: rpmsg_audio {
    + compatible = "fsl,imx8mn-rpmsg";
    + fsl,audioindex = <0> ;
    + fsl,version = <2>;
    + fsl,buffer-size = <0x6000000>;
    + fsl,enable-lpa;
    + };
    --
    2.27.0
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