From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- .../bindings/sound/simple-graph-card.txt | 137 +++++++++++++++++++++ 1 file changed, 137 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..5fa7b74 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/simple-graph-card.txt @@ -0,0 +1,137 @@ +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,format +- simple-audio-card,frame-master +- simple-audio-card,bitclock-master +- simple-audio-card,bitclock-inversion +- simple-audio-card,frame-inversion +- simple-audio-card,dai-tdm-slot-num +- simple-audio-card,dai-tdm-slot-width +- clocks / system-clock-frequency + +These should be implemented +- 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 + +Required properties: + +- compatible : "asoc-simple-graph-card"; +- dais : list of CPU DAI port{s} + +Example: Single DAI case + + sound_card: sound { + compatible = "asoc-simple-graph-card"; + + dais = <&cpu_port>; + }; + + codec { + ... + port { + codec_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint>; + }; + }; + }; + + cpu { + ... + cpu_port: port@0 { + cpu_endpoint: endpoint { + remote-endpoint = <&codec_endpoint>; + + simple-audio-card,format = "left_j"; + simple-audio-card,bitclock-master = <&cpu_endpoint>; + simple-audio-card,frame-master = <&cpu_endpoint>; + ... + }; + }; + }; + +Example: Multi DAI case + + sound_card: sound { + compatible = "asoc-simple-graph-card"; + + dais = <&cpu_port0 + &cpu_port1 + &cpu_port2>; + }; + + codec0 { + ... + port { + codec0_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint0>; + }; + }; + }; + + codec1 { + ... + port { + codec1_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint1>; + }; + }; + }; + + codec2 { + ... + port { + codec2_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint2>; + }; + }; + }; + + cpu { + ... + ports { + cpu_port0: port@0 { + cpu_endpoint0: endpoint { + remote-endpoint = <&codec0_endpoint>; + + simple-audio-card,format = "left_j"; + simple-audio-card,bitclock-master = <&cpu_endpoint0>; + simple-audio-card,frame-master = <&cpu_endpoint0>; + ... + }; + }; + cpu_port1: port@1 { + cpu_endpoint1: endpoint { + remote-endpoint = <&codec1_endpoint>; + + simple-audio-card,format = "i2s"; + simple-audio-card,bitclock-master = <&cpu_endpoint1>; + simple-audio-card,frame-master = <&cpu_endpoint1>; + ... + }; + }; + cpu_port2: port@2 { + cpu_endpoint2: endpoint { + remote-endpoint = <&codec2_endpoint>; + + simple-audio-card,format = "i2s"; + simple-audio-card,bitclock-master = <&cpu_endpoint2>; + simple-audio-card,frame-master = <&cpu_endpoint2>; + ... + }; + }; + }; + }; +