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gerrit.openbmc.org / openbmc / phosphor-power / a3ff7e71b1e044bfe4edcbb338e335b45a624715
commita3ff7e71b1e044bfe4edcbb338e335b45a624715[log] [tgz]
authorShawn McCarney <shawnmm@us.ibm.com>Tue Oct 15 17:34:49 2024 -0500
committerShawn McCarney <shawnmm@us.ibm.com>Tue Oct 22 11:27:29 2024 -0500
treefa46b270a8579e034fbe53b967dba88d0b929cae
parentdf2f4cb8883e4876ce9a13ce21340cf41390f324 [diff]
I2CInterface: Add process call methods

Add C++ methods to perform the following SMBus commands:
* Process Call
* Block Write-Block Read Process Call

For Block Write-Block Read Process Call, implement support for writes up
to 255 bytes. SMBus 2.0 supported a maximum of 32 bytes, and SMBus 3.0
supports a maximum of 255 bytes. The current Linux SMBus function only
supports 32 byte writes. Provide an alternate implementation using the
lower level I2C_RDWR ioctl() to support up to 255 bytes.

Tested:
* Verified Process Call worked correctly
* Verified Block Write-Block Read Process Call worked correctly
  * When using SMBus function
  * When using I2C_RDWR ioctl()
* Tested error cases
* See complete test plan at
  https://gist.github.com/smccarney/96eda4c7c11fe4f89e4491c768f76047

Change-Id: Icc1ba840741b1e26a50fe32bad8b2181a01dbb24
Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
4 files changed
tree: fa46b270a8579e034fbe53b967dba88d0b929cae
  1. cold-redundancy/
  2. example/
  3. org/
  4. phosphor-power-sequencer/
  5. phosphor-power-supply/
  6. phosphor-regulators/
  7. power-sequencer/
  8. power-supply/
  9. services/
  10. subprojects/
  11. test/
  12. tools/
  13. .clang-format
  14. .gitignore
  15. .shellcheck
  16. compatible_system_types_finder.cpp
  17. compatible_system_types_finder.hpp
  18. dbus_interfaces_finder.cpp
  19. dbus_interfaces_finder.hpp
  20. device.hpp
  21. device_monitor.hpp
  22. elog-errors.hpp
  23. file_descriptor.hpp
  24. format_utils.hpp
  25. gpio.cpp
  26. gpio.hpp
  27. LICENSE
  28. meson.build
  29. meson.options
  30. names_values.hpp
  31. OWNERS
  32. pmbus.cpp
  33. pmbus.hpp
  34. README.md
  35. temporary_file.cpp
  36. temporary_file.hpp
  37. temporary_subdirectory.cpp
  38. temporary_subdirectory.hpp
  39. types.hpp
  40. utility.cpp
  41. utility.hpp
README.md

phosphor-power

Overview

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

Actively-maintained applications:

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

Legacy applications:

  • power-sequencer: Original power sequencer monitoring application.
  • power-supply: Original power supply monitoring application.

Build

To build all applications in this repository:

  meson setup 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/<driver>.<instance>/
    • 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",
  }