arch/arm/boot/dts/overlays/fe-pi-audio-overlay.dts

   1 // Definitions for Fe-Pi Audio
   2 /dts-v1/;
   3 /plugin/;
   4
   5 / {
   6         compatible = "brcm,bcm2835";
   7
   8         fragment@0 {
   9                 target-path = "/";
  10                 __overlay__ {
  11                         sgtl5000_mclk: sgtl5000_mclk {
  12                                 compatible = "fixed-clock";
  13                                 #clock-cells = <0>;
  14                                 clock-frequency = <12288000>;
  15                                 clock-output-names = "sgtl5000-mclk";
  16                         };
  17                 };
  18         };
  19
  20         fragment@1 {
  21                 target = <&soc>;
  22                 __overlay__ {
  23                         reg_1v8: reg_1v8@0 {
  24                                 compatible = "regulator-fixed";
  25                                 regulator-name = "1V8";
  26                                 regulator-min-microvolt = <1800000>;
  27                                 regulator-max-microvolt = <1800000>;
  28                                 regulator-always-on;
  29                         };
  30                 };
  31         };
  32
  33         fragment@2 {
  34                 target = <&i2c1>;
  35                 __overlay__ {
  36                         #address-cells = <1>;
  37                         #size-cells = <0>;
  38                         status = "okay";
  39
  40                         sgtl5000@a {
  41                                 #sound-dai-cells = <0>;
  42                                 compatible = "fsl,sgtl5000";
  43                                 reg = <0x0a>;
  44                                 clocks = <&sgtl5000_mclk>;
  45                                 micbias-resistor-k-ohms = <2>;
  46                                 micbias-voltage-m-volts = <3000>;
  47                                 VDDA-supply = <&vdd_3v3_reg>;
  48                                 VDDIO-supply = <&vdd_3v3_reg>;
  49                                 VDDD-supply = <&reg_1v8>;
  50                                 status = "okay";
  51                         };
  52                 };
  53         };
  54
  55         fragment@3 {
  56                 target = <&i2s>;
  57                 __overlay__ {
  58                         status = "okay";
  59                 };
  60         };
  61
  62         fragment@4 {
  63                 target = <&sound>;
  64                 __overlay__ {
  65                         compatible = "fe-pi,fe-pi-audio";
  66                         i2s-controller = <&i2s>;
  67                         status = "okay";
  68                 };
  69         };
  70 };