Overview

This repository contains applications for configuring and monitoring devices that deliver power to the system.

• cold-redundancy: Application that makes power supplies work in Cold Redundancy mode and rotates them at intervals.
• phosphor-power-supply: Next generation power supply monitoring application.
• phosphor-regulators: JSON-driven application that configures and monitors voltage regulators.
• power-sequencer: A power sequencer monitoring application.
• power-supply: Original power supply monitoring application.
• tools/power-utils: Power supply utilities.

Build

To build all applications in this repository:

  meson build
  ninja -C build

To clean the repository and remove all build output:

  rm -rf build

You can specify meson options to customize the build process. For example, you can specify:

• Which applications to build and install.
• Application-specific configuration data, such as power sequencer type.
• Whether to build tests.

Power Supply Monitor and Util JSON config

Several applications in this repository require a PSU JSON config to run. The JSON config file provides information for:

• Where to access the pmbus attributes
• Which attribute file in pmbus maps to which property and interface in D-Bus
• Which kernel device directory is used on which PSU

There is an example psu.json to describe the necessary configurations.

• inventoryPMBusAccessType defines the pmbus access type, which tells the service which sysfs type to use to read the attributes. The possible values are:
  • Base: The base dir, e.g. /sys/bus/i2c/devices/3-0069/
  • Hwmon: The hwmon dir, e.g. /sys/bus/i2c/devices/3-0069/hwmon/hwmonX/
  • Debug: The pmbus debug dir, e.g. /sys/kernel/debug/pmbus/hwmonX/
  • DeviceDebug: The device debug dir, e.g. '/sys/kernel/debug/./`
  • HwmonDeviceDebug: The hwmon device debug dir, e.g. /sys/kernel/debug/pmbus/hwmonX/cffps1/
• fruConfigs defines the mapping between the attribute file and the FRU inventory interface and property. The configuration example below indicates that the service will read part_number attribute file from a directory specified by the above pmbus access type, and assign to PartNumber property in xyz.openbmc_project.Inventory.Decorator.Asset interface.

    "fruConfigs": [
      {
        "propertyName": "PartNumber",
        "fileName": "part_number",
        "interface": "xyz.openbmc_project.Inventory.Decorator.Asset"
      }
    ]
  

• psuDevices defines the kernel device dir for each PSU in inventory. The configuration example below indicates that powersupply0's device is located in /sys/bus/i2c/devices/3-0069.

    "psuDevices": {
      "/xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply0" : "/sys/bus/i2c/devices/3-0069",
    }