1Renesas Sampling Rate Convert Sound Card:
2
3Renesas Sampling Rate Convert Sound Card specifies audio DAI connections of SoC <-> codec.
4
5Required properties:
6
7- compatible				: "renesas,rsrc-card,<board>"
8					  Examples with soctypes are:
9					    - "renesas,rsrc-card"
10					    - "renesas,rsrc-card,lager"
11					    - "renesas,rsrc-card,koelsch"
12Optional properties:
13
14- card_name				: User specified audio sound card name, one string
15					  property.
16- cpu					: CPU   sub-node
17- codec					: CODEC sub-node
18
19Optional subnode properties:
20
21- format				: CPU/CODEC common audio format.
22					  "i2s", "right_j", "left_j" , "dsp_a"
23					  "dsp_b", "ac97", "pdm", "msb", "lsb"
24- frame-master				: Indicates dai-link frame master.
25					  phandle to a cpu or codec subnode.
26- bitclock-master			: Indicates dai-link bit clock master.
27					  phandle to a cpu or codec subnode.
28- bitclock-inversion			: bool property. Add this if the
29					  dai-link uses bit clock inversion.
30- frame-inversion			: bool property. Add this if the
31					  dai-link uses frame clock inversion.
32- convert-rate				: platform specified sampling rate convert
33- audio-prefix				: see audio-routing
34- audio-routing				: A list of the connections between audio components.
35					  Each entry is a pair of strings, the first being the connection's sink,
36					  the second being the connection's source. Valid names for sources.
37					  use audio-prefix if some components is using same sink/sources naming.
38					  it can be used if compatible was "renesas,rsrc-card";
39
40Required CPU/CODEC subnodes properties:
41
42- sound-dai				: phandle and port of CPU/CODEC
43
44Optional CPU/CODEC subnodes properties:
45
46- clocks / system-clock-frequency	: specify subnode's clock if needed.
47					  it can be specified via "clocks" if system has
48					  clock node (= common clock), or "system-clock-frequency"
49					  (if system doens't support common clock)
50					  If a clock is specified, it is
51					  enabled with clk_prepare_enable()
52					  in dai startup() and disabled with
53					  clk_disable_unprepare() in dai
54					  shutdown().
55
56Example
57
58sound {
59	compatible = "renesas,rsrc-card,lager";
60
61	card-name = "rsnd-ak4643";
62	format = "left_j";
63	bitclock-master = <&sndcodec>;
64	frame-master = <&sndcodec>;
65
66	sndcpu: cpu {
67		sound-dai = <&rcar_sound>;
68	};
69
70	sndcodec: codec {
71		sound-dai = <&ak4643>;
72		system-clock-frequency = <11289600>;
73	};
74};
75