Gitiles
Code Review Sign In
gerrit.openbmc.org / openbmc / phosphor-power / e0c6a2d9a91f58ff25d18765516aa1a16618d5a0
commite0c6a2d9a91f58ff25d18765516aa1a16618d5a0[log] [tgz]
authorShawn McCarney <shawnmm@us.ibm.com>Fri May 01 11:37:08 2020 -0500
committerShawn McCarney <shawnmm@us.ibm.com>Sun May 03 00:07:53 2020 -0500
tree994d6b8d88048c1026794fc4eda5a527d99a88ec
parent84807b96facd36d4fbf93c16fe1f6ee9988dc4cf [diff]
regulators: Load JSON config file

There are three basic steps to loading the JSON configuration file
for the phosphor-regulators application:
* Find the correct base name using a D-Bus query
* Find the absolute path to the file by searching two directories
* Parse the config file and store the resulting C++ objects

The base name is currently hard-coded while waiting for an EntityManager
enhancement to be completed.  So the first step is partially done.

This commit implements the second and third steps.

Some minor changes were also made to conform these files to the coding
conventions used in the rest of the phosphor-regulators application.

Tested:
  * See test plan:
    https://gist.github.com/smccarney/5d164131a84717b3f2a8835ae0fc466b

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: Ie59d473d1fec5ce89c859621eb27579afdcde7aa
2 files changed
tree: 994d6b8d88048c1026794fc4eda5a527d99a88ec
  1. cold-redundancy/
  2. example/
  3. org/
  4. phosphor-power-supply/
  5. phosphor-regulators/
  6. power-sequencer/
  7. power-supply/
  8. services/
  9. test/
  10. tools/
  11. .clang-format
  12. .gitignore
  13. argument.hpp
  14. device.hpp
  15. device_monitor.hpp
  16. elog-errors.hpp
  17. file.hpp
  18. gpio.cpp
  19. gpio.hpp
  20. LICENSE
  21. MAINTAINERS
  22. meson.build
  23. meson_options.txt
  24. names_values.hpp
  25. pmbus.cpp
  26. pmbus.hpp
  27. README.md
  28. types.hpp
  29. utility.cpp
  30. utility.hpp
README.md

Code for detecting and analyzing power faults on Witherspoon.

To Build

To build this package, do the following steps:

    1. meson build
    2. ninja -C build

To clean the repository again run `rm -rf build`.

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",
  }