xref: /openbmc/phosphor-pid-control/pid/README (revision 6d31049a)
1ThermalControllers and FanControllers are derived objects from a common PID
2Controller object.  The design implemented in this structure is a facsimile of
3what was published in the Chrome OS source.
4
5One has any number of ThermalControllers that run through a PID step to
6generate a setpoint RPM to reach its thermal setpoint.  The maximum output
7from the set of ThermalControllers is taken as the input to all the
8FanController PID loops.
9
10Each group of these controllers is managed within a zone.  A PIDZone object
11helps manage them by providing a sensor value cache and overall execution.
12