The ELMA readreg/writereg commands changed some time ago from;

readreg slot reg-index
writereg slot reg-index hex-val-to-write

to

readreg slot reg-hex-addr
writereg slot reg-hex-addr hex-val-to-write

Previously, the ei2c.py script was quickly changed from one version to another
to validate that the hardware works. Now, I finally found the time to make the
addition to support the older versions as well.

The ei2c.py was changed to check (in the open()) function which f/w version we
have on the ELMA SysMon and applies the correct command based on version.