projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 708b4351 NC |
1 | Freescale Generic ASoC Sound Card with ASRC support |
| 2 | ||
| 3 | The Freescale Generic ASoC Sound Card can be used, ideally, for all Freescale | |
| 4 | SoCs connecting with external CODECs. | |
| 5 | ||
| 6 | The idea of this generic sound card is a bit like ASoC Simple Card. However, | |
| 7 | for Freescale SoCs (especially those released in recent years), most of them | |
| 8 | have ASRC (Documentation/devicetree/bindings/sound/fsl,asrc.txt) inside. And | |
| 9 | this is a specific feature that might be painstakingly controlled and merged | |
| 10 | into the Simple Card. | |
| 11 | ||
| 12 | So having this generic sound card allows all Freescale SoC users to benefit | |
| 13 | from the simplification of a new card support and the capability of the wide | |
| 14 | sample rates support through ASRC. | |
| 15 | ||
| 16 | Note: The card is initially designed for those sound cards who use I2S and | |
| 17 | PCM DAI formats. However, it'll be also possible to support those non | |
| 18 | I2S/PCM type sound cards, such as S/PDIF audio and HDMI audio, as long | |
| 19 | as the driver has been properly upgraded. | |
| 20 | ||
| 21 | ||
| 22 | The compatible list for this generic sound card currently: | |
| 23 | "fsl,imx-audio-cs42888" | |
| 24 | ||
| 25 | "fsl,imx-audio-wm8962" | |
| 26 | (compatible with Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt) | |
| 27 | ||
| 28 | "fsl,imx-audio-sgtl5000" | |
| 29 | (compatible with Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt) | |
| 30 | ||
| 31 | Required properties: | |
| 32 | ||
| 33 | - compatible : Contains one of entries in the compatible list. | |
| 34 | ||
| 35 | - model : The user-visible name of this sound complex | |
| 36 | ||
| 37 | - audio-cpu : The phandle of an CPU DAI controller | |
| 38 | ||
| 39 | - audio-codec : The phandle of an audio codec | |
| 40 | ||
| 41 | - audio-routing : A list of the connections between audio components. | |
| 42 | Each entry is a pair of strings, the first being the | |
| 43 | connection's sink, the second being the connection's | |
| 44 | source. There're a few pre-designed board connectors: | |
| 45 | * Line Out Jack | |
| 46 | * Line In Jack | |
| 47 | * Headphone Jack | |
| 48 | * Mic Jack | |
| 49 | * Ext Spk | |
| 50 | * AMIC (stands for Analog Microphone Jack) | |
| 51 | * DMIC (stands for Digital Microphone Jack) | |
| 52 | ||
| 53 | Note: The "Mic Jack" and "AMIC" are redundant while | |
| 54 | coexsiting in order to support the old bindings | |
| 55 | of wm8962 and sgtl5000. | |
| 56 | ||
| 57 | Optional properties: | |
| 58 | ||
| 59 | - audio-asrc : The phandle of ASRC. It can be absent if there's no | |
| 60 | need to add ASRC support via DPCM. | |
| 61 | ||
| 62 | Example: | |
| 63 | sound-cs42888 { | |
| 64 | compatible = "fsl,imx-audio-cs42888"; | |
| 65 | model = "cs42888-audio"; | |
| 66 | audio-cpu = <&esai>; | |
| 67 | audio-asrc = <&asrc>; | |
| 68 | audio-codec = <&cs42888>; | |
| 69 | audio-routing = | |
| 70 | "Line Out Jack", "AOUT1L", | |
| 71 | "Line Out Jack", "AOUT1R", | |
| 72 | "Line Out Jack", "AOUT2L", | |
| 73 | "Line Out Jack", "AOUT2R", | |
| 74 | "Line Out Jack", "AOUT3L", | |
| 75 | "Line Out Jack", "AOUT3R", | |
| 76 | "Line Out Jack", "AOUT4L", | |
| 77 | "Line Out Jack", "AOUT4R", | |
| 78 | "AIN1L", "Line In Jack", | |
| 79 | "AIN1R", "Line In Jack", | |
| 80 | "AIN2L", "Line In Jack", | |
| 81 | "AIN2R", "Line In Jack"; | |
| 82 | }; |