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.
Signed-off-by: Shengjiu Wang shengjiu.wang@nxp.com --- .../bindings/sound/imx-audio-rpmsg.yaml | 55 +++++++++++++++++++ 1 file changed, 55 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..ff9b3fc69dae --- /dev/null +++ b/Documentation/devicetree/bindings/sound/imx-audio-rpmsg.yaml @@ -0,0 +1,55 @@ +# 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 + +description: | + imx-rpmsg is a machine driver for supporting audio by rpmsg. + 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. + +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; + };