u-boot/arch/arm/dts/imx53-kp-u-boot.dtsi

/*
 * Copyright 2019
 * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
 *
 * SPDX-License-Identifier:     GPL-2.0+ or X11
 */

&fec {
	fixed-link { /* RMII fixed link for both HSC|DDC */
		speed = <100>;
		full-duplex;
	};
};

&pmic {
	u-boot,i2c-transaction-bytes = <3>;
};