This way it can easily be spotted which port is being triggered in case
someone wants to manually test it.
Change-Id: Ibd2c70170d97a786e37b6838b1ed6d4eb637ad8b
File powersupply.py defines the interface to be used by child classes
implementing it. It also provides helpers to allocate a child class
based on configuration provided ('type' field).
File powersupply_sispm.py is an implementation using pysispm [1], as it's
the one used to control the programmable power socket we have right now.
This kind of class will be used in later commits by Nanobts class, as we
want to poweroff the Nanobts completelly when not in use.
Using it requires the following extra dependencies:
$ apt-get install python3-usb
$ pip3 install pysispm
Related: OS#3040
[1] https://github.com/xypron/pysispm
Change-Id: I981c260eca1a61657147e6d83b4226618088223c
Pau Espin