DT development over time

- https://elinux.org/Device_Tree_frowand
- https://www.elinux.org/images/archive/e/e5/20161014033717!Dt_debugging_part_3.pdf
- https://events19.linuxfoundation.org/wp-content/uploads/2017/11/Edit-Speaker-Tools-BoF-Devicetree-OSS-Frank-Rowand.pdf
- https://elinux.org/images/d/dc/Elce_2017_dt_bof.pdf
- http://events17.linuxfoundation.org/sites/events/files/slides/elc_2017_dt_bof_0.pdf