projects / deliverable / linux.git / blame
| 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 | }; |