| Nicolin Chen | 708b435 | 2014-07-30 19:27:38 +0800 | [diff] [blame] | 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 | |
| Maciej S. Szmigiero | 50760ca | 2015-09-19 02:00:25 +0200 | [diff] [blame^] | 16 | Note: The card is initially designed for those sound cards who use AC'97, I2S |
| 17 | and PCM DAI formats. However, it'll be also possible to support those non |
| 18 | AC'97/I2S/PCM type sound cards, such as S/PDIF audio and HDMI audio, as |
| 19 | long as the driver has been properly upgraded. |
| Nicolin Chen | 708b435 | 2014-07-30 19:27:38 +0800 | [diff] [blame] | 20 | |
| 21 | |
| 22 | The compatible list for this generic sound card currently: |
| Maciej S. Szmigiero | 50760ca | 2015-09-19 02:00:25 +0200 | [diff] [blame^] | 23 | "fsl,imx-audio-ac97" |
| 24 | |
| Nicolin Chen | 708b435 | 2014-07-30 19:27:38 +0800 | [diff] [blame] | 25 | "fsl,imx-audio-cs42888" |
| 26 | |
| 27 | "fsl,imx-audio-wm8962" |
| 28 | (compatible with Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt) |
| 29 | |
| 30 | "fsl,imx-audio-sgtl5000" |
| 31 | (compatible with Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt) |
| 32 | |
| 33 | Required properties: |
| 34 | |
| 35 | - compatible : Contains one of entries in the compatible list. |
| 36 | |
| 37 | - model : The user-visible name of this sound complex |
| 38 | |
| 39 | - audio-cpu : The phandle of an CPU DAI controller |
| 40 | |
| 41 | - audio-codec : The phandle of an audio codec |
| 42 | |
| 43 | - audio-routing : A list of the connections between audio components. |
| 44 | Each entry is a pair of strings, the first being the |
| 45 | connection's sink, the second being the connection's |
| 46 | source. There're a few pre-designed board connectors: |
| 47 | * Line Out Jack |
| 48 | * Line In Jack |
| 49 | * Headphone Jack |
| 50 | * Mic Jack |
| 51 | * Ext Spk |
| 52 | * AMIC (stands for Analog Microphone Jack) |
| 53 | * DMIC (stands for Digital Microphone Jack) |
| 54 | |
| 55 | Note: The "Mic Jack" and "AMIC" are redundant while |
| 56 | coexsiting in order to support the old bindings |
| 57 | of wm8962 and sgtl5000. |
| 58 | |
| 59 | Optional properties: |
| 60 | |
| 61 | - audio-asrc : The phandle of ASRC. It can be absent if there's no |
| 62 | need to add ASRC support via DPCM. |
| 63 | |
| 64 | Example: |
| 65 | sound-cs42888 { |
| 66 | compatible = "fsl,imx-audio-cs42888"; |
| 67 | model = "cs42888-audio"; |
| 68 | audio-cpu = <&esai>; |
| 69 | audio-asrc = <&asrc>; |
| 70 | audio-codec = <&cs42888>; |
| 71 | audio-routing = |
| 72 | "Line Out Jack", "AOUT1L", |
| 73 | "Line Out Jack", "AOUT1R", |
| 74 | "Line Out Jack", "AOUT2L", |
| 75 | "Line Out Jack", "AOUT2R", |
| 76 | "Line Out Jack", "AOUT3L", |
| 77 | "Line Out Jack", "AOUT3R", |
| 78 | "Line Out Jack", "AOUT4L", |
| 79 | "Line Out Jack", "AOUT4R", |
| 80 | "AIN1L", "Line In Jack", |
| 81 | "AIN1R", "Line In Jack", |
| 82 | "AIN2L", "Line In Jack", |
| 83 | "AIN2R", "Line In Jack"; |
| 84 | }; |