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authorSascha Hauer <s.hauer@pengutronix.de>2016-10-18 10:10:24 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2016-10-18 10:10:24 +0200
commitbfbf18d991756858337f7700e8ff0a6f0dc31afc (patch)
treecf3568de4fdff1891e277507f08f49a871682706 /dts/Bindings/sound/simple-scu-card.txt
parent834f6bf5e5f1169065376ad1aeb6a6266e66ce5c (diff)
downloadbarebox-bfbf18d991756858337f7700e8ff0a6f0dc31afc.tar.gz
barebox-bfbf18d991756858337f7700e8ff0a6f0dc31afc.tar.xz
dts: update to v4.9-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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+ASoC simple SCU Sound Card
+
+Simple-Card specifies audio DAI connections of SoC <-> codec.
+
+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
+
+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,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,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.
+ use audio-prefix if some components is using same sink/sources naming.
+ it can be used if compatible was "renesas,rsrc-card";
+
+Required CPU/CODEC subnodes properties:
+
+- sound-dai : phandle and port of CPU/CODEC
+
+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().
+
+Example 1. Sampling Rate Covert
+
+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,prefix = "ak4642";
+ simple-audio-card,routing = "ak4642 Playback", "DAI0 Playback",
+ "DAI0 Capture", "ak4642 Capture";
+
+ sndcpu: simple-audio-card,cpu {
+ sound-dai = <&rcar_sound>;
+ };
+
+ sndcodec: simple-audio-card,codec {
+ sound-dai = <&ak4643>;
+ system-clock-frequency = <11289600>;
+ };
+};
+
+Example 2. 2 CPU 1 Codec
+
+sound {
+ compatible = "renesas,rsrc-card";
+
+ card-name = "rsnd-ak4643";
+ format = "left_j";
+ bitclock-master = <&dpcmcpu>;
+ frame-master = <&dpcmcpu>;
+
+ convert-rate = <48000>; /* see audio_clk_a */
+
+ audio-prefix = "ak4642";
+ audio-routing = "ak4642 Playback", "DAI0 Playback",
+ "ak4642 Playback", "DAI1 Playback";
+
+ dpcmcpu: cpu@0 {
+ sound-dai = <&rcar_sound 0>;
+ };
+
+ cpu@1 {
+ sound-dai = <&rcar_sound 1>;
+ };
+
+ codec {
+ sound-dai = <&ak4643>;
+ clocks = <&audio_clock>;
+ };
+};