wm8903.txt

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    1 WM8903 audio CODEC
    2 
    3 This device supports I2C only.
    4 
    5 Required properties:
    6 
    7   - compatible : "wlf,wm8903"
    8 
    9   - reg : the I2C address of the device.
   10 
   11   - gpio-controller : Indicates this device is a GPIO controller.
   12 
   13   - #gpio-cells : Should be two. The first cell is the pin number and the
   14     second cell is used to specify optional parameters (currently unused).
   15 
   16 Optional properties:
   17 
   18   - interrupts : The interrupt line the codec is connected to.
   19 
   20   - micdet-cfg : Default register value for R6 (Mic Bias). If absent, the
   21     default is 0.
   22 
   23   - micdet-delay : The debounce delay for microphone detection in mS. If
   24     absent, the default is 100.
   25 
   26   - gpio-cfg : A list of GPIO configuration register values. The list must
   27     be 5 entries long. If absent, no configuration of these registers is
   28     performed. If any entry has the value 0xffffffff, that GPIO's
   29     configuration will not be modified.
   30 
   31   - AVDD-supply : Analog power supply regulator on the AVDD pin.
   32 
   33   - CPVDD-supply : Charge pump supply regulator on the CPVDD pin.
   34 
   35   - DBVDD-supply : Digital buffer supply regulator for the DBVDD pin.
   36 
   37   - DCVDD-supply : Digital core supply regulator for the DCVDD pin.
   38 
   39 Pins on the device (for linking into audio routes):
   40 
   41   * IN1L
   42   * IN1R
   43   * IN2L
   44   * IN2R
   45   * IN3L
   46   * IN3R
   47   * DMICDAT
   48   * HPOUTL
   49   * HPOUTR
   50   * LINEOUTL
   51   * LINEOUTR
   52   * LOP
   53   * LON
   54   * ROP
   55   * RON
   56   * MICBIAS
   57 
   58 Example:
   59 
   60 wm8903: codec@1a {
   61         compatible = "wlf,wm8903";
   62         reg = <0x1a>;
   63         interrupts = < 347 >;
   64 
   65         AVDD-supply = <&fooreg_a>;
   66         CPVDD-supply = <&fooreg_b>;
   67         DBVDD-supply = <&fooreg_c>;
   68         DCVDC-supply = <&fooreg_d>;
   69 
   70         gpio-controller;
   71         #gpio-cells = <2>;
   72 
   73         micdet-cfg = <0>;
   74         micdet-delay = <100>;
   75         gpio-cfg = <
   76                 0x0600 /* DMIC_LR, output */
   77                 0x0680 /* DMIC_DAT, input */
   78                 0x0000 /* GPIO, output, low */
   79                 0x0200 /* Interrupt, output */
   80                 0x01a0 /* BCLK, input, active high */
   81         >;
   82 };

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sys/contrib/device-tree/Bindings/sound/wm8903.txt