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 functionwill be enabled,- rpmsg-in:
- description: |
This is a boolean property. If present, the receiving functionwill 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