Support temp sensor on MCU which is available from I2C

Chassis MCU exposes register to report temperature for the peripheral board.
The MCU access is configurable as below:
        {
            "Bus": $bus,
            "Address": "0xAA",
            "Reg": "0xBB",
            "Class": "MCUTemp",
            "Name": "MCU Temp",
            "Thresholds": [
                xxx
            ]
            "Type": "MCUTempSensor"
        }

Tested:
The below interface was found under temperature sensor namespace:
          └─/xyz/openbmc_project/sensors/temperature/MCU_Temp

Run ipmitool sensor and check below from list:
MCU Temp     | 30.175      | degrees C  | cr    | na        | 0.000     | 5.000     | 110.000   | 115.000   | na

Change-Id: I8d54455ccc39ea4f60a5b4aee5c68be092d39a72
Signed-off-by: Yuan Li <yuan.li@linux.intel.com>
4 files changed
tree: bf08faea7d55e2d4fa89572d8f34c178d8f712dc
  1. cmake/
  2. include/
  3. service_files/
  4. src/
  5. tests/
  6. .clang-format
  7. .gitignore
  8. cmake-format.json
  9. CMakeLists.txt
  10. Jenkinsfile
  11. LICENSE
  12. MAINTAINERS
  13. README.md
README.md

dbus-sensors

dbus-sensors is a collection of sensor applications that provide the xyz.openbmc_project.Sensor collection of interfaces. They read sensor values from hwmon, d-bus, or direct driver access to provide readings. Some advance non-sensor features such as fan presence, pwm control, and automatic cpu detection (x86) are also supported.

key features

  • runtime re-configurable from d-bus (entity-manager or the like)

  • isolated: each sensor type is isolated into its own daemon, so a bug in one sensor is unlikely to affect another, and single sensor modifications are possible

  • async single-threaded: uses sdbusplus/asio bindings

  • multiple data inputs: hwmon, d-bus, direct driver access