Here's his stance on the issue.
> there is no need to reject hardware with nonfree designs on principle.
http://www.wired.com/2015/03/need-free-digital-hardware-desi...
> there is no need to reject hardware with nonfree designs on principle.
http://www.wired.com/2015/03/need-free-digital-hardware-desi...
That's not to say that there isn't value in open hardware, and certainly it's not a bad idea to advocate for open designs. It's just not part of the FSF's mission.