How to implement dual rotor FAN in Entity Manager & PID control

[Alice Hsu]

Hi team,

I would like to post dual rotor FAN in my BMC, but I have some problems in EntityManager/Fan sensor and PID control.

  1.  Entity Manager:

Per present pin could only corresponding to one fan tach, do it support the dual rotor condition , if it could how to configure the setting ?

  1.  PID Control: https://github.com/openbmc/phosphor-pid-control/blob/0001ee0224eea058e8bf0a71bd019e74f8b1738d/dbus/dbusconfiguration.cpp#L663

The referenced mentioned PID only support one pwm per one tach , we would like to know how to support dual rotor FAN?

Also post more details here.
https://github.com/openbmc/phosphor-pid-control/issues/18
https://github.com/openbmc/entity-manager/issues/17


Sincerely,
Alice Hsu

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