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@xxxxxxx> > --- > .../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@xxxxxxx> > + > +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 >
