Some years ago I was investigating it as a possible product for Routie ( https://routie.io ) to sell. Then I had one at home, and I wanted to come back and conquer porting linux to a new platform.
This is a pretty unique platform. The interrupt controller is something that no open source driver exists for (unless you count the Linux 2.6 era hacky trash you find in GPL dumps).
The timer is also unique, it runs at 200Mhz so it has a 5 nanosecond tick rate, but again, no drivers exist. I suspect this might be because good timing is required for the fiber protocol ¯\_(ツ)_/¯
This processor is EcoNet EN7526, but if I can make it work, the same port SHOULD work for EN7512, EN7513, EN7520 and EN7521 out of the box. With minimal reworking it should also work for EN7516, EN7527 and EN7528 as well.
So this port will bring linux compatibility to quite a bit of hardware.