tests/bluetooth/tester/nrf52840_pca10056.overlay - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 / {
 	chosen {
 		zephyr,uart-pipe = &uart0;
 	};
 };

 &uart0 {
 	compatible = "nordic,nrf-uart";
 	current-speed = <115200>;
 	status = "ok";
 };
	/ {
	chosen {
	zephyr,uart-pipe = &uart0;
	};
	};

	&uart0 {
	compatible = "nordic,nrf-uart";
	current-speed = <115200>;
	status = "ok";
	};