is there a BBB-specific tutorial for device trees?

in my never-ending quest to be as lazy as possible, i'm looking for
a publicly-available tutorial on device trees for my training
course(s) that specifically addresses the beaglebone black. for
example, here's one for zilinx's zynq-7000:

which, admittedly, is still pretty good for general use, but if anyone
has written something similar for the BBB, that'd be great.