linux/Documentation/devicetree/bindings/mfd/arizona.txt
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   1Wolfson Arizona class audio SoCs
   2
   3These devices are audio SoCs with extensive digital capabilites and a range
   4of analogue I/O.
   5
   6Required properties:
   7
   8  - compatible : one of the following chip-specific strings:
   9        "wlf,wm5102"
  10        "wlf,wm5110"
  11  - reg : I2C slave address when connected using I2C, chip select number when
  12    using SPI.
  13
  14  - interrupts : The interrupt line the /IRQ signal for the device is
  15    connected to.
  16  - interrupt-controller : Arizona class devices contain interrupt controllers
  17    and may provide interrupt services to other devices.
  18  - interrupt-parent : The parent interrupt controller.
  19  - #interrupt-cells: the number of cells to describe an IRQ, this should be 2.
  20    The first cell is the IRQ number.
  21    The second cell is the flags, encoded as the trigger masks from
  22    Documentation/devicetree/bindings/interrupts.txt
  23
  24  - gpio-controller : Indicates this device is a GPIO controller.
  25  - #gpio-cells : Must be 2. The first cell is the pin number and the
  26    second cell is used to specify optional parameters (currently unused).
  27
  28  - AVDD1-supply, DBVDD1-supply, DBVDD2-supply, DBVDD3-supply, CPVDD-supply,
  29    SPKVDDL-supply, SPKVDDR-supply : power supplies for the device, as covered
  30    in Documentation/devicetree/bindings/regulator/regulator.txt
  31
  32Optional properties:
  33
  34  - wlf,reset : GPIO specifier for the GPIO controlling /RESET
  35  - wlf,ldoena : GPIO specifier for the GPIO controlling LDOENA
  36
  37  - wlf,gpio-defaults : A list of GPIO configuration register values. If
  38    absent, no configuration of these registers is performed. If any
  39    entry has a value that is out of range for a 16 bit register then
  40    the chip default will be used.  If present exactly five values must
  41    be specified.
  42
  43Example:
  44
  45codec: wm5102@1a {
  46        compatible = "wlf,wm5102";
  47        reg = <0x1a>;
  48        interrupts = <347>;
  49        #interrupt-cells = <2>;
  50        interrupt-parent = <&gic>;
  51
  52        gpio-controller;
  53        #gpio-cells = <2>;
  54
  55        wlf,gpio-defaults = <
  56                0x00000000, /* AIF1TXLRCLK */
  57                0xffffffff,
  58                0xffffffff,
  59                0xffffffff,
  60                0xffffffff,
  61        >;
  62};
  63