arch/arm/boot/dts/overlays/uart3-overlay.dts

   1 /dts-v1/;
   2 /plugin/;
   3
   4 /{
   5         compatible = "brcm,bcm2711";
   6
   7         fragment@0 {
   8                 target = <&uart3>;
   9                 __overlay__ {
  10                         pinctrl-names = "default";
  11                         pinctrl-0 = <&uart3_pins>;
  12                         status = "okay";
  13                 };
  14         };
  15
  16         fragment@1 {
  17                 target = <&uart3_pins>;
  18                 __dormant__ {
  19                         brcm,pins = <4 5 6 7>;
  20                         brcm,pull = <0 2 2 0>;
  21                 };
  22         };
  23
  24         __overrides__ {
  25                 ctsrts = <0>,"=1";
  26         };
  27 };