arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts

   1 // Definitions for audiosense add on soundcard
   2 /dts-v1/;
   3 /plugin/;
   4 #include <dt-bindings/pinctrl/bcm2835.h>
   5 #include <dt-bindings/gpio/gpio.h>
   6
   7 / {
   8         compatible = "brcm,bcm2835";
   9
  10         fragment@0 {
  11                 target = <&i2s>;
  12                 __overlay__ {
  13                         status = "okay";
  14                 };
  15         };
  16
  17         fragment@1 {
  18                 target-path = "/";
  19                 __overlay__ {
  20                         codec_reg_1v8: codec-reg-1v8 {
  21                                 compatible = "regulator-fixed";
  22                                 regulator-name = "tlv320aic3204_1v8";
  23                                 regulator-min-microvolt = <1800000>;
  24                                 regulator-max-microvolt = <1800000>;
  25                                 regulator-always-on;
  26                         };
  27
  28                         /* audio external oscillator */
  29                         codec_osc: codec_osc {
  30                                 compatible = "fixed-clock";
  31                                 #clock-cells = <0>;
  32                                 clock-frequency = <12000000>;   /* 12 MHz */
  33                         };
  34                 };
  35         };
  36
  37         fragment@2 {
  38                 target = <&gpio>;
  39                 __overlay__ {
  40                         codec_rst: codec-rst {
  41                                 brcm,pins = <26>;
  42                                 brcm,function = <BCM2835_FSEL_GPIO_OUT>;
  43                         };
  44                 };
  45         };
  46
  47         fragment@3 {
  48                 target = <&i2c1>;
  49                 __overlay__ {
  50                         #address-cells = <1>;
  51                         #size-cells = <0>;
  52                         status = "okay";
  53
  54                         codec: tlv320aic32x4@18 {
  55                                 #sound-dai-cells = <0>;
  56                                 compatible = "ti,tlv320aic32x4";
  57                                 reg = <0x18>;
  58
  59                                 clocks = <&codec_osc>;
  60                                 clock-names = "mclk";
  61
  62                                 iov-supply = <&vdd_3v3_reg>;
  63                                 ldoin-supply = <&vdd_3v3_reg>;
  64
  65                                 gpio-controller;
  66                                 #gpio-cells = <2>;
  67                                 reset-gpios = <&gpio 26 GPIO_ACTIVE_HIGH>;
  68
  69                                 status = "okay";
  70                         };
  71                 };
  72         };
  73
  74         fragment@4 {
  75                 target = <&sound>;
  76                 __overlay__ {
  77                         compatible = "as,audiosense-pi";
  78                         i2s-controller = <&i2s>;
  79                         status = "okay";
  80                 };
  81         };
  82 };