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 */ >; };