From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- v2 -> v3
- Added how to use Simple-Graph-SCU-Card, and cleaned-up
.../bindings/sound/simple-graph-scu-card.txt | 65 ++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt
diff --git a/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt b/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt new file mode 100644 index 0000000..223096a --- /dev/null +++ b/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt @@ -0,0 +1,65 @@ +Simple-Graph-SCU-Card: + +Simple-Graph-SCU-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-SCU-Card property is same as Simple-Card / Simple-Graph-Card. +see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt + ${LINUX}/Documentation/devicetree/bindings/sound/simple-graph-card.txt + +Main difference between Simple-Graph-Card and Simple-Graph-SCU-Card is that +Simple-Graph-SCU-Card can use multi CPU. + +Required properties: + +- compatible : "asoc-simple-graph-scu-card"; +- simple-audio-card,routing : see simple-card.txt + +Example + +ak4643: codec@12 { + compatible = "asahi-kasei,ak4643"; + ... + port { + ak4643_fe: endpoint@0 { + remote-endpoint = <&rsnd_fe>; + ... + }; + ak4643_be: endpoint@1 { + remote-endpoint = <&rsnd_be>; + ... + }; + }; +}; + +rcar_sound { + ... + ports { + compatible = "asoc-simple-graph-scu-card"; + + simple-audio-card,name = "graph-sound"; + simple-audio-card,format = "left_j"; + simple-audio-card,bitclock-master = <&rsnd_fe>; + simple-audio-card,frame-master = <&rsnd_fe>; + simple-audio-card,convert-rate = <48000>; + simple-audio-card,convert-channels = <2>; + simple-audio-card,prefix = "ak4642"; + simple-audio-card,routing = + "ak4642 Playback", "DAI0 Playback", + "ak4642 Playback", "DAI1 Playback"; + + port@0 { + rsnd_fe: endpoint@0 { + remote-endpoint = <&ak4643_fe>; + ... + }; + }; + port@1 { + rsnd_be: endpoint@1 { + remote-endpoint = <&ak4643_be>; + ... + }; + }; + }; +};