1Freescale Generic ASoC Sound Card with ASRC support 2 3The Freescale Generic ASoC Sound Card can be used, ideally, for all Freescale 4SoCs connecting with external CODECs. 5 6The idea of this generic sound card is a bit like ASoC Simple Card. However, 7for Freescale SoCs (especially those released in recent years), most of them 8have ASRC (Documentation/devicetree/bindings/sound/fsl,asrc.txt) inside. And 9this is a specific feature that might be painstakingly controlled and merged 10into the Simple Card. 11 12So having this generic sound card allows all Freescale SoC users to benefit 13from the simplification of a new card support and the capability of the wide 14sample rates support through ASRC. 15 16Note: 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. 20 21 22The compatible list for this generic sound card currently: 23 "fsl,imx-audio-ac97" 24 25 "fsl,imx-audio-cs42888" 26 27 "fsl,imx-audio-cs427x" 28 (compatible with CS4271 and CS4272) 29 30 "fsl,imx-audio-wm8962" 31 32 "fsl,imx-audio-sgtl5000" 33 (compatible with Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt) 34 35 "fsl,imx-audio-wm8960" 36 37 "fsl,imx-audio-mqs" 38 39 "fsl,imx-audio-wm8524" 40 41 "fsl,imx-audio-tlv320aic32x4" 42 43Required properties: 44 45 - compatible : Contains one of entries in the compatible list. 46 47 - model : The user-visible name of this sound complex 48 49 - audio-cpu : The phandle of an CPU DAI controller 50 51 - audio-codec : The phandle of an audio codec 52 53Optional properties: 54 55 - audio-asrc : The phandle of ASRC. It can be absent if there's no 56 need to add ASRC support via DPCM. 57 58 - audio-routing : A list of the connections between audio components. 59 Each entry is a pair of strings, the first being the 60 connection's sink, the second being the connection's 61 source. There're a few pre-designed board connectors: 62 * Line Out Jack 63 * Line In Jack 64 * Headphone Jack 65 * Mic Jack 66 * Ext Spk 67 * AMIC (stands for Analog Microphone Jack) 68 * DMIC (stands for Digital Microphone Jack) 69 70 Note: The "Mic Jack" and "AMIC" are redundant while 71 coexisting in order to support the old bindings 72 of wm8962 and sgtl5000. 73 74 - hp-det-gpio : The GPIO that detect headphones are plugged in 75 - mic-det-gpio : The GPIO that detect microphones are plugged in 76 - bitclock-master : Indicates dai-link bit clock master; for details see simple-card.yaml. 77 - frame-master : Indicates dai-link frame master; for details see simple-card.yaml. 78 - dai-format : audio format, for details see simple-card.yaml. 79 - frame-inversion : dai-link uses frame clock inversion, for details see simple-card.yaml. 80 - bitclock-inversion : dai-link uses bit clock inversion, for details see simple-card.yaml. 81 82Optional unless SSI is selected as a CPU DAI: 83 84 - mux-int-port : The internal port of the i.MX audio muxer (AUDMUX) 85 86 - mux-ext-port : The external port of the i.MX audio muxer 87 88Example: 89sound-cs42888 { 90 compatible = "fsl,imx-audio-cs42888"; 91 model = "cs42888-audio"; 92 audio-cpu = <&esai>; 93 audio-asrc = <&asrc>; 94 audio-codec = <&cs42888>; 95 audio-routing = 96 "Line Out Jack", "AOUT1L", 97 "Line Out Jack", "AOUT1R", 98 "Line Out Jack", "AOUT2L", 99 "Line Out Jack", "AOUT2R", 100 "Line Out Jack", "AOUT3L", 101 "Line Out Jack", "AOUT3R", 102 "Line Out Jack", "AOUT4L", 103 "Line Out Jack", "AOUT4R", 104 "AIN1L", "Line In Jack", 105 "AIN1R", "Line In Jack", 106 "AIN2L", "Line In Jack", 107 "AIN2R", "Line In Jack"; 108}; 109