On Mon, Nov 28, 2016 at 02:47:57AM +0000, Kuninori Morimoto wrote:
>
> From: Kuninori Morimoto <[email protected]>
>
> Signed-off-by: Kuninori Morimoto <[email protected]>
> ---
> .../bindings/sound/simple-graph-card.txt | 67
> ++++++++++++++++++++++
> 1 file changed, 67 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/sound/simple-graph-card.txt
>
> diff --git a/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> new file mode 100644
> index 0000000..3d4c5a8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> @@ -0,0 +1,67 @@
> +Simple-Graph-Card:
There's nothing simple about this. graph-audio-card or audio-card-graph.
> +
> +Simple-Graph-Card specifies audio DAI connections of SoC <-> codec.
> +It is based on common bindings for device graphs.
> +see ${LINUX}/Documentation/devicetree/bindings/graph.txt
> +
> +Basically, Simple-Graph-Card property is same as Simple-Card.
> +see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
> +
> +Below are same as Simple-Card.
> +
> +- simple-audio-card,name
> +- simple-audio-card,widgets
> +- simple-audio-card,routing
> +- simple-audio-card,mclk-fs
> +- simple-audio-card,hp-det-gpio
> +- simple-audio-card,mic-det-gpio
> +- simple-audio-card,format
> +- simple-audio-card,frame-master
> +- simple-audio-card,bitclock-master
> +- simple-audio-card,bitclock-inversion
> +- simple-audio-card,frame-inversion
> +- simple-audio-card,mclk-fs
> +- simple-audio-card,dai-tdm-slot-num
> +- simple-audio-card,dai-tdm-slot-width
The simple-audio-card prefix is pointless. It's fine to reuse, but don't
add to it.
> +- clocks / system-clock-frequency
> +
> +In Simple-Graph-Card, above properties need in CPU side port on DT.
> +And it needs to have "compatible" property too.
> +In addition, CPU side driver needs to call
> asoc_simple_card_try_to_probe_graph_card().
> +It will probe specified Card driver if it could find "compatible" property
> on port.
> +Otherwise, it will do nothing.
> +
> +Required properties:
> +
> +- compatible : "asoc-simple-graph-card";
> +- type : "sound";
> +
> +Example
> +
> +ak4643: codec@12 {
> + compatible = "asahi-kasei,ak4643";
> + ...
> + port {
> + type = "sound";
> + ak4643_port: endpoint {
> + remote-endpoint = <&rcar_ak4643_port>;
> + ...
> + };
> + };
> +};
> +
> +rcar_sound {
> + ...
> + port {
> + compatible = "asoc-simple-graph-card";
Do you have an example where you'd have multiple ports? If not, this
should go up a level.
> +
> + simple-audio-card,format = "left_j";
> + simple-audio-card,bitclock-master = <&ak4643_port>;
> + simple-audio-card,frame-master = <&ak4643_port>;
If you follow video-interfaces.txt, these should all go in the endpoint
node.
> + type = "sound";
> + rcar_ak4643_port: endpoint {
> + remote-endpoint = <&ak4643_port>;
> + ...
> + };
> + };
> +};
> --
> 1.9.1
>
