I tried to add a proper entry to the .dts file that adds the GPIO pins but I wasn't successful as I have less to zero knowledge on how all this entries work together. But I guess for somebody who knows what he is doing it would be fairly easy to get it working with the information from the wiki.
Ah cool, i had the unit on my desk and was going to try it out today. looking fwd to seeing your results, the normal ERX has a POE port aswell, would be nice if i could get it to work
Thanks. I checked already upfront the new wiki page. In the sense of the PoE my questions was still the same (since the wiki page is the same on that part). I did some more tests today and I'm going to edit the wiki now with the latest status as of OpenWrt 19.07(-rc2).