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ASoC: simple-card: Add DT documentation for multi-DAI links 

Many couples of CPU/CODEC DAI links may be described in the DT
thanks to 'simple-audio-card,dai-link' containers.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Jean-Francois Moine 2014-03-20 11:04:16 +01:00 committed by Mark Brown
parent cf7dc23cbf
commit 015f630de8
1 changed files with 41 additions and 1 deletions
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42
Documentation/devicetree/bindings/sound/simple-card.txt
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@ -23,6 +23,11 @@ Optional properties:
Required subnodes:
- simple-audio-card,dai-link : container for the CPU and CODEC sub-nodes
This container may be omitted when the
card has only one DAI link.
See the examples.
- simple-audio-card,cpu : CPU sub-node
- simple-audio-card,codec : CODEC sub-node
@ -49,7 +54,7 @@ Note:
CPU and CODEC sides as we need to keep the settings identical for both ends
of the link.
Example:
Example 1 - single DAI link:
sound {
compatible = "simple-audio-card";
@ -94,3 +99,38 @@ sh_fsi2: sh_fsi2@ec230000 {
interrupt-parent = <&gic>;
interrupts = <0 146 0x4>;
};
Example 2 - many DAI links:
sound {
compatible = "simple-audio-card";
simple-audio-card,name = "Cubox Audio";
simple-audio-card,format = "i2s";
simple-audio-card,dai-link@0 { /* I2S - HDMI */
simple-audio-card,cpu {
sound-dai = <&audio1 0>;
};
simple-audio-card,codec {
sound-dai = <&tda998x 0>;
};
};
simple-audio-card,dai-link@1 { /* S/PDIF - HDMI */
simple-audio-card,cpu {
sound-dai = <&audio1 1>;
};
simple-audio-card,codec {
sound-dai = <&tda998x 1>;
};
};
simple-audio-card,dai-link@2 { /* S/PDIF - S/PDIF */
simple-audio-card,cpu {
sound-dai = <&audio1 1>;
};
simple-audio-card,codec {
sound-dai = <&spdif_codec>;
};
};
};