docs/designs/power-recovery.md

36 Some system owners may chose to attach an Uninterrupted Power Supply (UPS) to
37 their system. A UPS continues to provide power to a system through a blackout or
38 brownout scenario. A UPS has a limited amount of power so it's main purpose is
102 loss of power if there is no UPS installed to keep the system on. To identify
145 ### Uninterruptible Power Supply (UPS)
147 When a UPS is present and a blackout or brownout condition occurs, the BMC must:
152 - If the UPS battery power becomes low and if host firmware is running, notify
155 - Log an error if the UPS battery power becomes low and a power loss to the
157   power and UPS is about to run out of power)
254 ### Uninterruptible Power Supply (UPS)
256 A new phosphor-dbus-interface will be defined to represent a UPS. A BMC
257 application will implement one of these per UPS attached to the system. This
258 application will monitor UPS status and monitor for the following:
260 - UPS utility fail (system power has failed and UPS is providing system power)
261 - UPS battery low (UPS is about to run out of power)
263 If the application sees power has been lost and the system is running on UPS
264 battery power then it will monitor for the power remaining in the UPS and notify
266 responsible for logging an error indicating the UPS backup power has been
269 phosphor-state-manager will query mapper for implementation of this new UPS
319 Plug a UPS into a system and ensure when power is cut to the system that an