u-boot/arch/arm/dts/omap3-u-boot.dtsi

/*
 * Copyright (C) 2017
 * Logic PD - http://www.logicpd.com
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

&uart1 {
	reg-shift = <2>;
};

&uart2 {
	reg-shift = <2>;
};

&uart3 {
	reg-shift = <2>;
};