Commit | Line | Data |
---|---|---|
415f1cb2 KM |
1 | Renesas Sampling Rate Convert Sound Card: |
2 | ||
3 | Renesas Sampling Rate Convert Sound Card specifies audio DAI connections of SoC <-> codec. | |
4 | ||
5 | Required properties: | |
6 | ||
7 | - compatible : "renesas,rsrc-card,<board>" | |
8 | Examples with soctypes are: | |
9 | - "renesas,rsrc-card,lager" | |
10 | - "renesas,rsrc-card,koelsch" | |
11 | Optional properties: | |
12 | ||
13 | - card_name : User specified audio sound card name, one string | |
14 | property. | |
15 | - cpu : CPU sub-node | |
16 | - codec : CODEC sub-node | |
17 | ||
18 | Optional subnode properties: | |
19 | ||
20 | - format : CPU/CODEC common audio format. | |
21 | "i2s", "right_j", "left_j" , "dsp_a" | |
22 | "dsp_b", "ac97", "pdm", "msb", "lsb" | |
23 | - frame-master : Indicates dai-link frame master. | |
24 | phandle to a cpu or codec subnode. | |
25 | - bitclock-master : Indicates dai-link bit clock master. | |
26 | phandle to a cpu or codec subnode. | |
27 | - bitclock-inversion : bool property. Add this if the | |
28 | dai-link uses bit clock inversion. | |
29 | - frame-inversion : bool property. Add this if the | |
30 | dai-link uses frame clock inversion. | |
af7e2be9 | 31 | - convert-rate : platform specified sampling rate convert |
415f1cb2 KM |
32 | |
33 | Required CPU/CODEC subnodes properties: | |
34 | ||
35 | - sound-dai : phandle and port of CPU/CODEC | |
36 | ||
37 | Optional CPU/CODEC subnodes properties: | |
38 | ||
39 | - clocks / system-clock-frequency : specify subnode's clock if needed. | |
40 | it can be specified via "clocks" if system has | |
41 | clock node (= common clock), or "system-clock-frequency" | |
42 | (if system doens't support common clock) | |
43 | If a clock is specified, it is | |
44 | enabled with clk_prepare_enable() | |
45 | in dai startup() and disabled with | |
46 | clk_disable_unprepare() in dai | |
47 | shutdown(). | |
48 | ||
49 | Example | |
50 | ||
51 | sound { | |
52 | compatible = "renesas,rsrc-card,lager"; | |
53 | ||
54 | card-name = "rsnd-ak4643"; | |
55 | format = "left_j"; | |
56 | bitclock-master = <&sndcodec>; | |
57 | frame-master = <&sndcodec>; | |
58 | ||
59 | sndcpu: cpu { | |
60 | sound-dai = <&rcar_sound>; | |
61 | }; | |
62 | ||
63 | sndcodec: codec { | |
64 | sound-dai = <&ak4643>; | |
65 | system-clock-frequency = <11289600>; | |
66 | }; | |
67 | }; |