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SubjectRe: [PATCH v2 7/7] ASoC: dt-bindings: imx-rpmsg: Add binding doc for rpmsg machine driver
On Sun, Feb 07, 2021 at 06:23:55PM +0800, Shengjiu Wang wrote:
> Imx-rpmsg is a new added machine driver for supporting audio on Cortex-M
> core. The Cortex-M core will control the audio interface, DMA and audio
> codec, setup the pipeline, the audio driver on Cortex-A core side is just
> to communitcate with M core, it is a virtual sound card and don't touch
> the hardware.

I don't understand why there are 2 nodes for this other than you happen
to want to split this into 2 Linux drivers. It's 1 h/w thing.

>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> ---
> .../bindings/sound/imx-audio-rpmsg.yaml | 48 +++++++++++++++++++
> 1 file changed, 48 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/imx-audio-rpmsg.yaml
>
> diff --git a/Documentation/devicetree/bindings/sound/imx-audio-rpmsg.yaml b/Documentation/devicetree/bindings/sound/imx-audio-rpmsg.yaml
> new file mode 100644
> index 000000000000..b941aeb80678
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/imx-audio-rpmsg.yaml
> @@ -0,0 +1,48 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/imx-audio-rpmsg.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NXP i.MX audio complex with rpmsg
> +
> +maintainers:
> + - Shengjiu Wang <shengjiu.wang@nxp.com>
> +
> +properties:
> + compatible:
> + enum:
> + - fsl,imx-audio-rpmsg
> +
> + model:
> + $ref: /schemas/types.yaml#/definitions/string
> + description: User specified audio sound card name
> +
> + audio-cpu:
> + description: The phandle of an CPU DAI controller
> +
> + rpmsg-out:
> + description: |
> + This is a boolean property. If present, the transmitting function
> + will be enabled,
> +
> + rpmsg-in:
> + description: |
> + This is a boolean property. If present, the receiving function
> + will be enabled.
> +
> +required:
> + - compatible
> + - model
> + - audio-cpu
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + sound-rpmsg {
> + compatible = "fsl,imx-audio-rpmsg";
> + model = "ak4497-audio";
> + audio-cpu = <&rpmsg_audio>;
> + rpmsg-out;
> + };
> --
> 2.27.0
>

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