WM8903 audio CODEC
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This device supports I2C only.
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Required properties:
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- compatible : "wlf,wm8903"
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- reg : the I2C address of the device.
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- gpio-controller : Indicates this device is a GPIO controller.
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- #gpio-cells : Should be two. The first cell is the pin number and the
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second cell is used to specify optional parameters (currently unused).
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Optional properties:
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- interrupts : The interrupt line the codec is connected to.
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- micdet-cfg : Default register value for R6 (Mic Bias). If absent, the
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default is 0.
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- micdet-delay : The debounce delay for microphone detection in mS. If
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absent, the default is 100.
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- gpio-cfg : A list of GPIO configuration register values. The list must
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be 5 entries long. If absent, no configuration of these registers is
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performed. If any entry has the value 0xffffffff, that GPIO's
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configuration will not be modified.
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- AVDD-supply : Analog power supply regulator on the AVDD pin.
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- CPVDD-supply : Charge pump supply regulator on the CPVDD pin.
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- DBVDD-supply : Digital buffer supply regulator for the DBVDD pin.
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- DCVDD-supply : Digital core supply regulator for the DCVDD pin.
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Pins on the device (for linking into audio routes):
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* IN1L
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* IN1R
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* IN2L
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* IN2R
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* IN3L
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* IN3R
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* DMICDAT
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* HPOUTL
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* HPOUTR
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* LINEOUTL
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* LINEOUTR
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* LOP
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* LON
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* ROP
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* RON
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* MICBIAS
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Example:
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wm8903: codec@1a {
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compatible = "wlf,wm8903";
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reg = <0x1a>;
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interrupts = < 347 >;
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AVDD-supply = <&fooreg_a>;
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CPVDD-supply = <&fooreg_b>;
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DBVDD-supply = <&fooreg_c>;
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DCVDC-supply = <&fooreg_d>;
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gpio-controller;
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#gpio-cells = <2>;
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micdet-cfg = <0>;
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micdet-delay = <100>;
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gpio-cfg = <
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0x0600 /* DMIC_LR, output */
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0x0680 /* DMIC_DAT, input */
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0x0000 /* GPIO, output, low */
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0x0200 /* Interrupt, output */
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0x01a0 /* BCLK, input, active high */
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>;
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};
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