On Thu, Feb 11, 2021 at 6:18 AM Rob Herring <robh@xxxxxxxxxx> wrote: > > 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. This one is for the sound card machine driver. Another one is for the sound card cpu dai driver. so there are 2 nodes. > > > > > 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 > >
