Lantiq have come out with a new chipset and Netgear have released a new model based on it. The https://www.netgear.com/support/product/D7000v2.aspx. There are GPL sources available and they use a build system very much based on OpenWRT. It uses a 3.10.102 kernel which appears to have quite a few Lantiq specific patches so I guess porting their drivers to a current kernel is non-trivial.
It is the first decent device I have found that has integrated xDSL so it would be quite amazing to get this working.
The chipset is XRX500.
Anyone who has expertise in this are and willing to help. I can facilitate remote console access with remote reboot if required. I am will to pay for time spent?