diff options
Diffstat (limited to 'Documentation/devicetree/bindings/sound/simple-scu-card.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/sound/simple-scu-card.txt | 67 |
1 files changed, 25 insertions, 42 deletions
diff --git a/Documentation/devicetree/bindings/sound/simple-scu-card.txt b/Documentation/devicetree/bindings/sound/simple-scu-card.txt index d6fe47ed09af..327d229a51b2 100644 --- a/Documentation/devicetree/bindings/sound/simple-scu-card.txt +++ b/Documentation/devicetree/bindings/sound/simple-scu-card.txt @@ -1,35 +1,29 @@ -ASoC simple SCU Sound Card +ASoC Simple SCU Sound Card -Simple-Card specifies audio DAI connections of SoC <-> codec. +Simple SCU Sound Card is "Simple Sound Card" + "ALSA DPCM". +For example, you can use this driver if you want to exchange sampling rate convert, +Mixing, etc... Required properties: - compatible : "simple-scu-audio-card" "renesas,rsrc-card" - Optional properties: -- simple-audio-card,name : User specified audio sound card name, one string - property. -- simple-audio-card,cpu : CPU sub-node -- simple-audio-card,codec : CODEC sub-node +- simple-audio-card,name : see simple-audio-card.txt +- simple-audio-card,cpu : see simple-audio-card.txt +- simple-audio-card,codec : see simple-audio-card.txt Optional subnode properties: -- simple-audio-card,format : CPU/CODEC common audio format. - "i2s", "right_j", "left_j" , "dsp_a" - "dsp_b", "ac97", "pdm", "msb", "lsb" -- simple-audio-card,frame-master : Indicates dai-link frame master. - phandle to a cpu or codec subnode. -- simple-audio-card,bitclock-master : Indicates dai-link bit clock master. - phandle to a cpu or codec subnode. -- simple-audio-card,bitclock-inversion : bool property. Add this if the - dai-link uses bit clock inversion. -- simple-audio-card,frame-inversion : bool property. Add this if the - dai-link uses frame clock inversion. +- simple-audio-card,format : see simple-audio-card.txt +- simple-audio-card,frame-master : see simple-audio-card.txt +- simple-audio-card,bitclock-master : see simple-audio-card.txt +- simple-audio-card,bitclock-inversion : see simple-audio-card.txt +- simple-audio-card,frame-inversion : see simple-audio-card.txt - simple-audio-card,convert-rate : platform specified sampling rate convert - simple-audio-card,convert-channels : platform specified converted channel size (2 - 8 ch) -- simple-audio-card,prefix : see audio-routing +- simple-audio-card,prefix : see routing - simple-audio-card,routing : A list of the connections between audio components. Each entry is a pair of strings, the first being the connection's sink, the second being the connection's source. Valid names for sources. @@ -38,32 +32,23 @@ Optional subnode properties: Required CPU/CODEC subnodes properties: -- sound-dai : phandle and port of CPU/CODEC +- sound-dai : see simple-audio-card.txt Optional CPU/CODEC subnodes properties: -- clocks / system-clock-frequency : specify subnode's clock if needed. - it can be specified via "clocks" if system has - clock node (= common clock), or "system-clock-frequency" - (if system doens't support common clock) - If a clock is specified, it is - enabled with clk_prepare_enable() - in dai startup() and disabled with - clk_disable_unprepare() in dai - shutdown(). +- clocks / system-clock-frequency : see simple-audio-card.txt -Example 1. Sampling Rate Covert +Example 1. Sampling Rate Conversion sound { compatible = "simple-scu-audio-card"; simple-audio-card,name = "rsnd-ak4643"; simple-audio-card,format = "left_j"; - simple-audio-card,format = "left_j"; simple-audio-card,bitclock-master = <&sndcodec>; simple-audio-card,frame-master = <&sndcodec>; - simple-audio-card,convert-rate = <48000>; /* see audio_clk_a */ + simple-audio-card,convert-rate = <48000>; simple-audio-card,prefix = "ak4642"; simple-audio-card,routing = "ak4642 Playback", "DAI0 Playback", @@ -79,20 +64,18 @@ sound { }; }; -Example 2. 2 CPU 1 Codec +Example 2. 2 CPU 1 Codec (Mixing) sound { - compatible = "renesas,rsrc-card"; - - card-name = "rsnd-ak4643"; - format = "left_j"; - bitclock-master = <&dpcmcpu>; - frame-master = <&dpcmcpu>; + compatible = "simple-scu-audio-card"; - convert-rate = <48000>; /* see audio_clk_a */ + simple-audio-card,name = "rsnd-ak4643"; + simple-audio-card,format = "left_j"; + simple-audio-card,bitclock-master = <&dpcmcpu>; + simple-audio-card,frame-master = <&dpcmcpu>; - audio-prefix = "ak4642"; - audio-routing = "ak4642 Playback", "DAI0 Playback", + simple-audio-card,prefix = "ak4642"; + simple-audio-card,routing = "ak4642 Playback", "DAI0 Playback", "ak4642 Playback", "DAI1 Playback"; dpcmcpu: cpu@0 { |