tree 4ff90ef22c4fe2afb70f2745732ad9aaca06570b
parent 8d8d8d7ca49b06cecfbc0a87f821f05dec535fa3
author Adrian Ambrożewicz <adrian.ambrozewicz@linux.intel.com> 1591271995 +0200
committer Adrian Ambrożewicz <adrian.ambrozewicz@linux.intel.com> 1591609951 +0000

Support retrieving 'utilization' from ME

ME exposes sensors which express host CPU utilization in range 0-255.
This change introduces following things:
- 'MESensor' sensor type introduced alongside legacy 'METemp' for clarity
- ability to expose 'utilization' sensor with range 0-100 (percent)
- scaling utilization value from 0-255 to 0-100

Testing:
- added following configuration on platform:
{
  "Address": 190,
  "Class": "MESensor",
  "Name": "Host CPU Core Utilization",
  "SensorType": "utilization",
  "ScaleValue": 0.392,
  "Type": "IpmbSensor"
}
- configuration properly loaded
- sensors appear on D-Bus and Redfish:
{
    "@odata.id": "/redfish/v1/Chassis/WC_Baseboard/Sensors/Host_CPU_Core_Utilization",
    "@odata.type": "#Sensor.v1_0_0.Sensor",
    "Id": "Host_CPU_Core_Utilization",
    "Name": "Host CPU Core Utilization",
    "Reading": 98.784,
    "ReadingRangeMax": 100.0,
    "ReadingRangeMin": 0.0,
    "ReadingUnits": "Percent",
    "Status": {
        "Health": "OK",
        "State": "Enabled"
    }
}

Change-Id: I49a14820e1b72f9776bd24ba1584d81ee0c95cd5
Signed-off-by: Adrian Ambrożewicz <adrian.ambrozewicz@linux.intel.com>