Add new power actions for the sysmoBTS2050. This allows to
switch off the secondary/slave when the system temperature
is too high and back on when the normal level is reached.
Do not allow to switch off the master (so remove the enum
value), do not check if the slave is switching itself off.
The PA will be unconditionally turned. This makes it possible
that in case of a crash, the PA will be turned on and then we
will do the temperature measurement and turn it off again. There
are no known crashes with the sysmobts-mgr right now so the risk
seems to be okay. In case we can't switch off the PA we have no
way to escalate it right now. We have not seen a dead uc either
so the risk is okay as well.
We can't switch the PA back on once we reach the normal level
as the BTS might transmit with full power and we would need more
current than the power supply/rails can carry. So leave the
system off right now.
What is missing is to use the OML router to actually inform
the BSC that something bad has happened at the BTS.
Check the temperature and move between "NORMAL", "WARNING"
and "CRITICAL" state. We will only return from CRITICAL to
WARNING when the temperature has significantly changed, and
when being in state "WARNING" we enter an intermediate state
to allow an easy hysteris.
We haven't done anything with the result of the micro controller
query and querying every six hours for the temperature of the
system will not help us. We need to query the temperatures more
frequently but avoid writing to the eeprom too frequently so we
will start another timer for that.
Holger Hans Peter Freyther