tree f3d5295bfda7268fe33008d42319fab62765e735
parent e610b3168321eee167271e4532c37fe1ed9c6f56
author Chris Cain <cjcain@us.ibm.com> 1708023572 -0600
committer Chris Cain <cjcain@us.ibm.com> 1708724886 +0000

Systems: Add support to read AllowedPowerModes

Instead of hardcodeing the AllowedPowerModes property, the data will be
read from dbus if it exists. If data is empty/not found, the property
will be set to the default value:
  [ "MaximumPerformance", "PowerSaving", "Static" ]

Tested on Rainier hardware and Validator passed

When dbus property is empty, it will show default modes:
'''
xyz.openbmc_project.Control.Power.Mode interface -         -                                                                     -
.AllowedPowerModes                     property  as        0                                                                     const
.PowerMode                             property  s         "xyz.openbmc_project.Control.Power.Mode.PowerMode.MaximumPerformance" emits-change writable

    "PowerMode": "MaximumPerformance",
    "PowerMode@Redfish.AllowableValues": [
        "MaximumPerformance",
        "PowerSaving",
        "Static"
    ],
    "PowerRestorePolicy": "AlwaysOff",
'''

When dbus property populated with 6 modes:
'''                                                                                                           -
xyz.openbmc_project.Control.Power.Mode interface -         -                                                                                                                                                                                                                                                                                                                                                                                                                             -
.AllowedPowerModes                     property  as        6 "xyz.openbmc_project.Control.Power.Mode.PowerMode.BalancedPerformance" "xyz.openbmc_project.Control.Power.Mode.PowerMode.EfficiencyFavorPerformance" "xyz.openbmc_project.Control.Power.Mode.PowerMode.EfficiencyFavorPower" "xyz.openbmc_project.Control.Power.Mode.PowerMode.MaximumPerformance" "xyz.openbmc_project.Control.Power.Mode.PowerMode.PowerSaving" "xyz.openbmc_project.Control.Power.Mode.PowerMode.Static" const
.PowerMode                             property  s         "xyz.openbmc_project.Control.Power.Mode.PowerMode.MaximumPerformance"                                                                                                                                                                                                                                                                                                                                                         emits-change writable

    "PowerMode": "MaximumPerformance",
    "PowerMode@Redfish.AllowableValues": [
        "BalancedPerformance",
        "EfficiencyFavorPerformance",
        "EfficiencyFavorPower",
        "MaximumPerformance",
        "PowerSaving",
        "Static"
    ],
    "PowerRestorePolicy": "AlwaysOff",
'''

When dbus property not defined it will show default modes:
'''
xyz.openbmc_project.Control.Power.Mode interface -         -                                                                     -
.PowerMode                             property  s         "xyz.openbmc_project.Control.Power.Mode.PowerMode.MaximumPerformance" emits-change writable

    "PowerMode": "MaximumPerformance",
    "PowerMode@Redfish.AllowableValues": [
        "MaximumPerformance",
        "PowerSaving",
        "Static"
    ],
    "PowerRestorePolicy": "AlwaysOff",
'''

Signed-off-by: Chris Cain <cjcain@us.ibm.com>
Change-Id: Ic9882d2760a39dd1a0ea353624eb3c8575f4c6a0