arch/arm/boot/dts/overlays/i2s-gpio28-31-overlay.dts

   1 /*
   2  * Device tree overlay to move i2s to gpio 28 to 31 on CM
   3  */
   4
   5 /dts-v1/;
   6 /plugin/;
   7
   8 / {
   9         compatible = "brcm,bcm2835";
  10
  11         fragment@0 {
  12                 target = <&i2s_pins>;
  13                 __overlay__ {
  14                         brcm,pins = <28 29 30 31>;
  15                         brcm,function = <6>; /* alt2 */
  16                 };
  17         };
  18 };