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 41Required properties: 42 43 - compatible : Contains one of entries in the compatible list. 44 45 - model : The user-visible name of this sound complex 46 47 - audio-cpu : The phandle of an CPU DAI controller 48 49 - audio-codec : The phandle of an audio codec 50 51Optional properties: 52 53 - audio-asrc : The phandle of ASRC. It can be absent if there's no 54 need to add ASRC support via DPCM. 55 56 - audio-routing : A list of the connections between audio components. 57 Each entry is a pair of strings, the first being the 58 connection's sink, the second being the connection's 59 source. There're a few pre-designed board connectors: 60 * Line Out Jack 61 * Line In Jack 62 * Headphone Jack 63 * Mic Jack 64 * Ext Spk 65 * AMIC (stands for Analog Microphone Jack) 66 * DMIC (stands for Digital Microphone Jack) 67 68 Note: The "Mic Jack" and "AMIC" are redundant while 69 coexisting in order to support the old bindings 70 of wm8962 and sgtl5000. 71 72 - hp-det-gpio : The GPIO that detect headphones are plugged in 73 - mic-det-gpio : The GPIO that detect microphones are plugged in 74 - bitclock-master : Indicates dai-link bit clock master; for details see simple-card.yaml. 75 - frame-master : Indicates dai-link frame master; for details see simple-card.yaml. 76 - dai-format : audio format, for details see simple-card.yaml. 77 - frame-inversion : dai-link uses frame clock inversion, for details see simple-card.yaml. 78 - bitclock-inversion : dai-link uses bit clock inversion, for details see simple-card.yaml. 79 80Optional unless SSI is selected as a CPU DAI: 81 82 - mux-int-port : The internal port of the i.MX audio muxer (AUDMUX) 83 84 - mux-ext-port : The external port of the i.MX audio muxer 85 86Example: 87sound-cs42888 { 88 compatible = "fsl,imx-audio-cs42888"; 89 model = "cs42888-audio"; 90 audio-cpu = <&esai>; 91 audio-asrc = <&asrc>; 92 audio-codec = <&cs42888>; 93 audio-routing = 94 "Line Out Jack", "AOUT1L", 95 "Line Out Jack", "AOUT1R", 96 "Line Out Jack", "AOUT2L", 97 "Line Out Jack", "AOUT2R", 98 "Line Out Jack", "AOUT3L", 99 "Line Out Jack", "AOUT3R", 100 "Line Out Jack", "AOUT4L", 101 "Line Out Jack", "AOUT4R", 102 "AIN1L", "Line In Jack", 103 "AIN1R", "Line In Jack", 104 "AIN2L", "Line In Jack", 105 "AIN2R", "Line In Jack"; 106}; 107