karlp@nanopineo:~$ cat /boot/overlay-user/karl-usart2-rx.dts
/dts-v1/;
/plugin/;

/ {
	compatible = "allwinner,sun4i-a10", "allwinner,sun7i-a20", "allwinner,sun8i-h3", "allwinner,sun50i-a64", "a
llwinner,sun50i-h5";

	/* Attempt to enable internal pulls on uart2 rx... */
	fragment@0 {
		target = <&pio>;
		__overlay__ {
			k_rx2_pull_please: uart2-pins {
				pins = "PA1";
				bias-pull-up;
			};
		};
	};

};