> +&emac { > + allwinner,tx-delay-ps = <500>; > +}; Is this direct MAC to MAC without a PHY in the middle? And RGMII? 500ps seems odd. It is normally 1000ps. And you need to specify a delay for both Rx and Tx. I could understand &emac { allwinner,tx-delay-ps = <500>; allwinner,rx-delay-ps = <500>; }; then each end adds 1/2 the delay on both Rx and Tx. Andrew