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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:
codec: wm8903@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 */
>;
};
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