This directory contains the source code for applications performing system power on and off control, and power sequencer device configuration and monitoring.
Implements GPIO control of power on / off and monitoring of the chassis power good (pgood). The GPIOs are defined in the device tree and are named power-chassis-control and power-chassis-good respectively. The chassis pgood is monitored on a three second poll. Enforces a minimum power off time of 15 seconds from cold start and 25 seconds from power off.
Provides the server implementation of the org.openbmc.control.Power D-Bus interface.
Determines the type and I2C information of the power sequencer device with the Entity Manager xyz.openbmc_project.Configuration.UCD90320 interface. If a specific device interface is not provided or not desired, a generic base class implementation (see the PowerSequencerMonitor class below) will be used.
Defines the org.openbmc.control.Power D-Bus interface.
The state property is set to initiate a power on or power off sequence. The power good pgood property reflects the power state of the chassis. At power on time the pgood will lag the state as the power sequencer performs its processing. The same lag will occur on a requested power off. Loss of pgood without a state change request indicates a pgood failure.
Implements a generic power sequencer device monitoring interface. Used when the specific device type is not specified or cannot be determined. Also used as a base class for specific device classes. The generic implementation does not do any device specific analysis and does not need Entity Manager or JSON file configuration.
Implements a specific UCD90320 power sequencer device monitoring class. Uses the Entity Manager IBMCompatibleSystem interface to locate its JSON based configuration. The loaded configuration allows pgood failure analysis to determine the specific voltage rail or pgood pin which has failed.