Kernel-3.10.0-957.el7_wm8994

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).

• AVDD2-supply, DBVDD1-supply, DBVDD2-supply, DBVDD3-supply, CPVDD-supply,
  SPKVDD1-supply, SPKVDD2-supply : power supplies for the device, as covered
  in Documentation/devicetree/bindings/regulator/regulator.txt

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-parent : The parent interrupt controller.

• #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/interrupts.txt

• 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.

Example:

codec: wm8994@1a {
compatible = “wlf,wm8994”;
reg = <0x1a>;

gpio-controller;
#gpio-cells = <2>;

lineout1-se;

AVDD2-supply = <&regulator>;
CPVDD-supply = <&regulator>;
DBVDD1-supply = <&regulator>;
DBVDD2-supply = <&regulator>;
DBVDD3-supply = <&regulator>;
SPKVDD1-supply = <&regulator>;
SPKVDD2-supply = <&regulator>;

};