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-Card, and cleanup
.../bindings/sound/simple-graph-card.txt | 65 ++++++++++++++++++++++ 1 file changed, 65 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..11823b0 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/simple-graph-card.txt @@ -0,0 +1,65 @@ +Simple-Graph-Card: + +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 +- 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"; + +Example + +ak4643: codec@12 { + compatible = "asahi-kasei,ak4643"; + ... + port { + ak4643_port: endpoint { + remote-endpoint = <&rcar_ak4643_port>; + clocks = <&audio_clock>; + }; + }; +}; + +rcar_sound { + ... + port { + compatible = "asoc-simple-graph-card"; + + simple-audio-card,format = "left_j"; + simple-audio-card,bitclock-master = <&ak4643_port>; + simple-audio-card,frame-master = <&ak4643_port>; + + rcar_ak4643_port: endpoint { + remote-endpoint = <&ak4643_port>; + ... + }; + }; +};