Kernel-4.18.0-80.el8_wm8903

WM8903 audio CODEC

This device supports I2C only.

Required properties:

• compatible : “wlf,wm8903”

• reg : the I2C address of the device.

• gpio-controller : Indicates this device is a GPIO controller.

• #gpio-cells : Should be two. The first cell is the pin number and the
  second cell is used to specify optional parameters (currently unused).

Optional properties:

• interrupts : The interrupt line the codec is connected to.

• micdet-cfg : Default register value for R6 (Mic Bias). If absent, the
  default is 0.

• micdet-delay : The debounce delay for microphone detection in mS. If
  absent, the default is 100.

• gpio-cfg : A list of GPIO configuration register values. The list must
  be 5 entries long. If absent, no configuration of these registers is
  performed. If any entry has the value 0xffffffff, that GPIO’s
  configuration will not be modified.

• AVDD-supply : Analog power supply regulator on the AVDD pin.

• CPVDD-supply : Charge pump supply regulator on the CPVDD pin.

• DBVDD-supply : Digital buffer supply regulator for the DBVDD pin.

• DCVDD-supply : Digital core supply regulator for the DCVDD pin.

Pins on the device (for linking into audio routes):

• IN1L
• IN1R
• IN2L
• IN2R
• IN3L
• IN3R
• DMICDAT
• HPOUTL
• HPOUTR
• LINEOUTL
• LINEOUTR
• LOP
• LON
• ROP
• RON
• MICBIAS

Example:

wm8903: codec@1a {
compatible = “wlf,wm8903”;
reg = <0x1a>;
interrupts = < 347 >;

AVDD-supply = <&fooreg_a>;
CPVDD-supply = <&fooreg_b>;
DBVDD-supply = <&fooreg_c>;
DCVDC-supply = <&fooreg_d>;

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

micdet-cfg = <0>;
micdet-delay = <100>;
gpio-cfg = <
    0x0600 /* DMIC_LR, output */
    0x0680 /* DMIC_DAT, input */
    0x0000 /* GPIO, output, low */
    0x0200 /* Interrupt, output */
    0x01a0 /* BCLK, input, active high */
>;

};