On EIC7700, RXC and RXD experience an internal skew before reaching the
MAC. At high speed, this can shift the effective sampling point by
approximately half a cycle, causing the MAC to sample the wrong nibble
on each edge.

You say internal. So the skew is fixed, it is a property of the
silicon? If so, why a DT property? Why not just hard code it in the
driver? Since it is internal, different boards should not need it set
differently?

	Andrew