mirror of https://gitee.com/openkylin/linux.git
75 lines
2.3 KiB
Plaintext
75 lines
2.3 KiB
Plaintext
Renesas Sampling Rate Convert Sound Card:
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Renesas Sampling Rate Convert Sound Card specifies audio DAI connections of SoC <-> codec.
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Required properties:
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- compatible : "renesas,rsrc-card{,<board>}"
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Examples with boards are:
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- "renesas,rsrc-card"
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- "renesas,rsrc-card,lager"
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- "renesas,rsrc-card,koelsch"
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Optional properties:
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- card_name : User specified audio sound card name, one string
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property.
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- cpu : CPU sub-node
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- codec : CODEC sub-node
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Optional subnode properties:
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- format : CPU/CODEC common audio format.
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"i2s", "right_j", "left_j" , "dsp_a"
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"dsp_b", "ac97", "pdm", "msb", "lsb"
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- frame-master : Indicates dai-link frame master.
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phandle to a cpu or codec subnode.
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- bitclock-master : Indicates dai-link bit clock master.
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phandle to a cpu or codec subnode.
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- bitclock-inversion : bool property. Add this if the
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dai-link uses bit clock inversion.
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- frame-inversion : bool property. Add this if the
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dai-link uses frame clock inversion.
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- convert-rate : platform specified sampling rate convert
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- audio-prefix : see audio-routing
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- audio-routing : A list of the connections between audio components.
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Each entry is a pair of strings, the first being the connection's sink,
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the second being the connection's source. Valid names for sources.
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use audio-prefix if some components is using same sink/sources naming.
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it can be used if compatible was "renesas,rsrc-card";
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Required CPU/CODEC subnodes properties:
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- sound-dai : phandle and port of CPU/CODEC
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Optional CPU/CODEC subnodes properties:
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- clocks / system-clock-frequency : specify subnode's clock if needed.
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it can be specified via "clocks" if system has
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clock node (= common clock), or "system-clock-frequency"
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(if system doens't support common clock)
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If a clock is specified, it is
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enabled with clk_prepare_enable()
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in dai startup() and disabled with
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clk_disable_unprepare() in dai
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shutdown().
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Example
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sound {
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compatible = "renesas,rsrc-card,lager";
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card-name = "rsnd-ak4643";
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format = "left_j";
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bitclock-master = <&sndcodec>;
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frame-master = <&sndcodec>;
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sndcpu: cpu {
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sound-dai = <&rcar_sound>;
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};
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sndcodec: codec {
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sound-dai = <&ak4643>;
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system-clock-frequency = <11289600>;
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};
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};
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