[U-Boot] IXP43X and Ethernet NPE

Hello,

I want to use Uboot on a Gateworks Cambria Board. This board includes an IXP430 CPU. Uboot is already running, but I have some problems getting Ethernet to work. All the NPE stuff, in Uboot, is based on IXP400 SW Release version 2.0 which doesn't support the IXP43X MCU NPEs. So what do you think, should I have to use the IXP400 SW Release 2.4, which offer support for IXP43X MCU NPEs? Or is there somethings else I can do?

Thanks!

Best regards Mirko