cs42l56.txt

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    1 CS42L52 audio CODEC
    2 
    3 Required properties:
    4 
    5   - compatible : "cirrus,cs42l56"
    6 
    7   - reg : the I2C address of the device for I2C
    8 
    9   - VA-supply, VCP-supply, VLDO-supply : power supplies for the device,
   10   as covered in Documentation/devicetree/bindings/regulator/regulator.txt.
   11 
   12 Optional properties:
   13 
   14   - cirrus,gpio-nreset : GPIO controller's phandle and the number
   15   of the GPIO used to reset the codec.
   16 
   17   - cirrus,chgfreq-divisor : Values used to set the Charge Pump Frequency.
   18   Allowable values of 0x00 through 0x0F. These are raw values written to the
   19   register, not the actual frequency. The frequency is determined by the following.
   20   Frequency = MCLK / 4 * (N+2)
   21   N = chgfreq_val
   22   MCLK = Where MCLK is the frequency of the mclk signal after the MCLKDIV2 circuit.
   23 
   24   - cirrus,ain1a-ref-cfg, ain1b-ref-cfg : boolean, If present, AIN1A or AIN1B are configured
   25   as a pseudo-differential input referenced to AIN1REF/AIN3A.
   26 
   27   - cirrus,ain2a-ref-cfg, ain2b-ref-cfg : boolean, If present, AIN2A or AIN2B are configured
   28   as a pseudo-differential input referenced to AIN2REF/AIN3B.
   29 
   30   - cirrus,micbias-lvl: Set the output voltage level on the MICBIAS Pin.
   31   0 = 0.5 x VA
   32   1 = 0.6 x VA
   33   2 = 0.7 x VA
   34   3 = 0.8 x VA
   35   4 = 0.83 x VA
   36   5 = 0.91 x VA
   37 
   38   - cirrus,adaptive-pwr-cfg : Configures how the power to the Headphone and Lineout
   39   Amplifiers adapt to the output signal levels.
   40   0 = Adapt to Volume Mode. Voltage level determined by the sum of the relevant volume settings.
   41   1 = Fixed - Headphone and Line Amp supply = + or - VCP/2.
   42   2 = Fixed - Headphone and Line Amp supply = + or - VCP.
   43   3 = Adapted to Signal; Voltage level is dynamically determined by the output signal.
   44 
   45   - cirrus,hpf-left-freq, hpf-right-freq : Sets the corner frequency (-3dB point) for the internal High-Pass
   46   Filter.
   47   0 = 1.8Hz
   48   1 = 119Hz
   49   2 = 236Hz
   50   3 = 464Hz
   51 
   52 
   53 Example:
   54 
   55 codec: codec@4b {
   56         compatible = "cirrus,cs42l56";
   57         reg = <0x4b>;
   58         cirrus,gpio-nreset = <&gpio 10 0>;
   59         cirrus,chgfreq-divisor = <0x05>;
   60         cirrus.ain1_ref_cfg;
   61         cirrus,micbias-lvl = <5>;
   62         VA-supply = <&reg_audio>;
   63 };

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sys/contrib/device-tree/Bindings/sound/cs42l56.txt