FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/sound/wm8994.txt

     WM1811/WM8994/WM8958 audio CODEC
     
     These devices support both I2C and SPI (configured with pin strapping
     on the board).
     
     Required properties:
     
       - compatible : One of "wlf,wm1811", "wlf,wm8994" or "wlf,wm8958".
     
      - reg : the I2C address of the device for I2C, the chip select
              number for SPI.
    
      - gpio-controller : Indicates this device is a GPIO controller.
      - #gpio-cells : Must be 2. The first cell is the pin number and the
        second cell is used to specify optional parameters (currently unused).
    
      - power supplies for the device, as covered in
        Documentation/devicetree/bindings/regulator/regulator.txt, depending
        on compatible:
        - for wlf,wm1811 and wlf,wm8958:
          AVDD1-supply, AVDD2-supply, DBVDD1-supply, DBVDD2-supply, DBVDD3-supply,
          DCVDD-supply, CPVDD-supply, SPKVDD1-supply, SPKVDD2-supply
        - for wlf,wm8994:
          AVDD1-supply, AVDD2-supply, DBVDD-supply, DCVDD-supply, CPVDD-supply,
          SPKVDD1-supply, SPKVDD2-supply
    
    Optional properties:
    
      - interrupts : The interrupt line the IRQ signal for the device is
        connected to.  This is optional, if it is not connected then none
        of the interrupt related properties should be specified.
      - interrupt-controller : These devices contain interrupt controllers
        and may provide interrupt services to other devices if they have an
        interrupt line connected.
      - #interrupt-cells: the number of cells to describe an IRQ, this should be 2.
        The first cell is the IRQ number.
        The second cell is the flags, encoded as the trigger masks from
        Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
    
      - clocks : A list of up to two phandle and clock specifier pairs
      - clock-names : A list of clock names sorted in the same order as clocks.
                      Valid clock names are "MCLK1" and "MCLK2".
    
      - wlf,gpio-cfg : A list of GPIO configuration register values. If absent,
        no configuration of these registers is performed. If any value is
        over 0xffff then the register will be left as default. If present 11
        values must be supplied.
    
      - wlf,micbias-cfg : Two MICBIAS register values for WM1811 or
        WM8958.  If absent the register defaults will be used.
    
      - wlf,ldo1ena : GPIO specifier for control of LDO1ENA input to device.
      - wlf,ldo2ena : GPIO specifier for control of LDO2ENA input to device.
    
      - wlf,lineout1-se : If present LINEOUT1 is in single ended mode.
      - wlf,lineout2-se : If present LINEOUT2 is in single ended mode.
    
      - wlf,lineout1-feedback : If present LINEOUT1 has common mode feedback
        connected.
      - wlf,lineout2-feedback : If present LINEOUT2 has common mode feedback
        connected.
    
      - wlf,ldoena-always-driven : If present LDOENA is always driven.
    
      - wlf,spkmode-pu : If present enable the internal pull-up resistor on
        the SPKMODE pin.
    
      - wlf,csnaddr-pd : If present enable the internal pull-down resistor on
        the CS/ADDR pin.
    
    Pins on the device (for linking into audio routes):
    
      * IN1LN
      * IN1LP
      * IN2LN
      * IN2LP:VXRN
      * IN1RN
      * IN1RP
      * IN2RN
      * IN2RP:VXRP
      * SPKOUTLP
      * SPKOUTLN
      * SPKOUTRP
      * SPKOUTRN
      * HPOUT1L
      * HPOUT1R
      * HPOUT2P
      * HPOUT2N
      * LINEOUT1P
      * LINEOUT1N
      * LINEOUT2P
      * LINEOUT2N
    
    Example:
    
    wm8994: codec@1a {
            compatible = "wlf,wm8994";
            reg = <0x1a>;
    
           gpio-controller;
           #gpio-cells = <2>;
   
           lineout1-se;
   
           AVDD1-supply = <&regulator>;
           AVDD2-supply = <&regulator>;
           CPVDD-supply = <&regulator>;
           DBVDD-supply = <&regulator>;
           DCVDD-supply = <&regulator>;
           SPKVDD1-supply = <&regulator>;
           SPKVDD2-supply = <&regulator>;
   };

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