> There is a strong distinction between selling open hardware
Correct. The entire supply chain evolved for proprietary stuff. There are NDAs and roadblocks everywhere.
Most chip vendors are very happy to assist close phone manufacturers in implementing drivers, optimize battery usage etc. and do not cooperate with any open source effort.
Edit: Google's Borg is a very different beast.
Edit: no need to patronize me. I worked on massive scale deployments otherwise I would not be commenting.