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| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2017-04-20 01:35:41 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-05-17 10:21:21 +0100 |
| commit | 2d4e31de5bb2b5fbdbcd8a3bfec0eae0bd4ca409 (patch) | |
| tree | a77835a8af6b58fa9259409ebf80226e9fc88771 | |
| parent | 1689333f8311f5952ee69d64adf242028dc7e6c6 (diff) | |
ASoC: add audio-graph-card document
"Audio Graph Card" = "Simple Card" + "OF-graph"
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/sound/audio-graph-card.txt | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/audio-graph-card.txt b/Documentation/devicetree/bindings/sound/audio-graph-card.txt new file mode 100644 index 000000000000..bac4b1b1060f --- /dev/null +++ b/Documentation/devicetree/bindings/sound/audio-graph-card.txt @@ -0,0 +1,124 @@ +Audio Graph Card: + +Audio 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, Audio Graph Card property is same as Simple Card. +see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt + +Below are same as Simple-Card. + +- label +- dai-format +- frame-master +- bitclock-master +- bitclock-inversion +- frame-inversion +- dai-tdm-slot-num +- dai-tdm-slot-width +- clocks / system-clock-frequency + +Required properties: + +- compatible : "audio-graph-card"; +- dais : list of CPU DAI port{s} + +Example: Single DAI case + + sound_card { + compatible = "audio-graph-card"; + + dais = <&cpu_port>; + }; + + dai-controller { + ... + cpu_port: port { + cpu_endpoint: endpoint { + remote-endpoint = <&codec_endpoint>; + + dai-format = "left_j"; + ... + }; + }; + }; + + audio-codec { + ... + port { + codec_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint>; + }; + }; + }; + +Example: Multi DAI case + + sound-card { + compatible = "audio-graph-card"; + + label = "sound-card"; + + dais = <&cpu_port0 + &cpu_port1 + &cpu_port2>; + }; + + audio-codec@0 { + ... + port { + codec0_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint0>; + }; + }; + }; + + audio-codec@1 { + ... + port { + codec1_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint1>; + }; + }; + }; + + audio-codec@2 { + ... + port { + codec2_endpoint: endpoint { + remote-endpoint = <&cpu_endpoint2>; + }; + }; + }; + + dai-controller { + ... + ports { + cpu_port0: port@0 { + cpu_endpoint0: endpoint { + remote-endpoint = <&codec0_endpoint>; + + dai-format = "left_j"; + ... + }; + }; + cpu_port1: port@1 { + cpu_endpoint1: endpoint { + remote-endpoint = <&codec1_endpoint>; + + dai-format = "i2s"; + ... + }; + }; + cpu_port2: port@2 { + cpu_endpoint2: endpoint { + remote-endpoint = <&codec2_endpoint>; + + dai-format = "i2s"; + ... + }; + }; + }; + }; + |