Beaglebone Black timer capture driver
More info on: Hardware [https://blog.dan.drown.org/beaglebone-black-gpstemperature-cape/],
Kernel Driver software [https://github.com/ddrown/pps-gmtimer]
The Beaglebone Black has a hardware timer capture. This means it can save the
couter value at the time an input edge happens. Since it has a 24MHz clock, the
timer has