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-Renesas Sampling Rate Convert Sound Card:
-
-Renesas Sampling Rate Convert Sound Card specifies audio DAI connections of SoC <-> codec.
-
-Required properties:
-
-- compatible : "renesas,rsrc-card{,<board>}"
- Examples with boards are:
- - "renesas,rsrc-card"
- - "renesas,rsrc-card,lager"
- - "renesas,rsrc-card,koelsch"
-Optional properties:
-
-- card_name : User specified audio sound card name, one string
- property.
-- cpu : CPU sub-node
-- codec : CODEC sub-node
-
-Optional subnode properties:
-
-- format : CPU/CODEC common audio format.
- "i2s", "right_j", "left_j" , "dsp_a"
- "dsp_b", "ac97", "pdm", "msb", "lsb"
-- frame-master : Indicates dai-link frame master.
- phandle to a cpu or codec subnode.
-- bitclock-master : Indicates dai-link bit clock master.
- phandle to a cpu or codec subnode.
-- bitclock-inversion : bool property. Add this if the
- dai-link uses bit clock inversion.
-- frame-inversion : bool property. Add this if the
- dai-link uses frame clock inversion.
-- convert-rate : platform specified sampling rate convert
-- convert-channels : platform specified converted channel size (2 - 8 ch)
-- audio-prefix : see audio-routing
-- audio-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
-
-sound {
- compatible = "renesas,rsrc-card,lager";
-
- card-name = "rsnd-ak4643";
- format = "left_j";
- bitclock-master = <&sndcodec>;
- frame-master = <&sndcodec>;
-
- sndcpu: cpu {
- sound-dai = <&rcar_sound>;
- };
-
- sndcodec: codec {
- sound-dai = <&ak4643>;
- system-clock-frequency = <11289600>;
- };
-};