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Not support FAN dual rotator to one present pin #17
Description
Hi All,
I am working on to add dual-rotor fans in my BMC. I added the below code. But the Fan_#_b does not have present property(cause of the present pin could use only one) , it will trigger the under threshold event due to no present judgment.
How do support dual-rotor in same present pin?
{
"Exposes": [
{
"Name": "Node Manager Sensor",
"Type": "NMSensor"
},
{
"Class": "AST2600-SRAM",
"Name": "Chassis Intrusion Sensor",
"Type": "ChassisIntrusionSensor"
},
{
"BindConnector": "System Fan connector 1",
"Index": 0,
"MaxReading": 28000,
"Name": "Fan 1 a",
"Bus": 3,
"Address": "0x20",
"Presence": {
"PinName": "FAN1_PRSNT_N",
"Polarity": "Low"
},
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 1",
"Index": 1,
"MaxReading": 28000,
"Name": "Fan 1 b",
"Bus": 3,
"Address": "0x20",
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 2",
"Index": 2,
"MaxReading": 28000,
"Name": "Fan 2 a",
"Bus": 3,
"Address": "0x20",
"Presence": {
"PinName": "FAN2_PRSNT_N",
"Polarity": "Low"
},
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 2",
"Index": 3,
"MaxReading": 28000,
"Name": "Fan 2 b",
"Bus": 3,
"Address": "0x20",
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 3",
"Index": 4,
"MaxReading": 28000,
"Name": "Fan 3 a",
"Bus": 3,
"Address": "0x20",
"Presence": {
"PinName": "FAN3_PRSNT_N",
"Polarity": "Low"
},
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 3",
"Index": 5,
"MaxReading": 28000,
"Name": "Fan 3 b",
"Bus": 3,
"Address": "0x20",
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 4",
"Index": 0,
"MaxReading": 28000,
"Name": "Fan 4 a",
"Bus": 3,
"Address": "0x23",
"Presence": {
"PinName": "FAN4_PRSNT_N",
"Polarity": "Low"
},
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 4",
"Index": 1,
"MaxReading": 28000,
"Name": "Fan 4 b",
"Bus": 3,
"Address": "0x23",
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 5",
"Index": 2,
"MaxReading": 28000,
"Name": "Fan 5 a",
"Bus": 3,
"Address": "0x23",
"Presence": {
"PinName": "FAN5_PRSNT_N",
"Polarity": "Low"
},
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 5",
"Index": 3,
"MaxReading": 28000,
"Name": "Fan 5 b",
"Bus": 3,
"Address": "0x23",
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 6",
"Index": 4,
"MaxReading": 28000,
"Name": "Fan 6 a",
"Bus": 3,
"Address": "0x23",
"Presence": {
"PinName": "FAN6_PRSNT_N",
"Polarity": "Low"
},
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"BindConnector": "System Fan connector 6",
"Index": 5,
"MaxReading": 28000,
"Name": "Fan 6 b",
"Bus": 3,
"Address": "0x23",
"Thresholds": [
{
"Direction": "less than",
"Name": "lower critical",
"Severity": 1,
"Value": 1000
},
{
"Direction": "less than",
"Name": "lower non critical",
"Severity": 0,
"Value": 2000
}
],
"Type": "I2CFan"
},
{
"Name": "System Fan connector 1",
"PwmName": "Pwm1",
"Pwm": 0,
"Tachs": [
0,1
],
"Type": "IntelFanConnector"
},
{
"Name": "System Fan connector 2",
"PwmName": "Pwm2",
"Pwm": 2,
"Tachs": [
2,3
],
"Type": "IntelFanConnector"
},
{
"Name": "System Fan connector 3",
"PwmName": "Pwm3",
"Pwm": 4,
"Tachs": [
4,5
],
"Type": "IntelFanConnector"
},
{
"Name": "System Fan connector 4",
"PwmName": "Pwm4",
"Pwm": 0,
"Tachs": [
0,1
],
"Type": "IntelFanConnector"
},
{
"Name": "System Fan connector 5",
"PwmName": "Pwm5",
"Pwm": 2,
"Tachs": [
2,3
],
"Type": "IntelFanConnector"
},
{
"Name": "System Fan connector 6",
"PwmName": "Pwm6",
"Pwm": 4,
"Tachs": [
4,5
],
"Type": "IntelFanConnector"
},
{
"Class": "fan",
"FFGainCoefficient": 5.0,
"FFOffCoefficient": 0.0,
"ICoefficient": 0.0,
"ILimitMax": 0.0,
"ILimitMin": 0.0,
"Inputs": [
"Fan_1_a",
"Fan_2_a",
"Fan_3_a",
"Fan_4_a",
"Fan_5_a",
"Fan_6_a"
],
"Name": "System_Fan",
"NegativeHysteresis": 0.0,
"OutLimitMax": 60.0,
"OutLimitMin": 30.0,
"Outputs": [
"Pwm1",
"Pwm2",
"Pwm3",
"Pwm4",
"Pwm5",
"Pwm6"
],
"PCoefficient": 0.0,
"PositiveHysteresis": 0.0,
"SlewNeg": 0.0,
"SlewPos": 0.0,
"Type": "Pid",
"Zones": [
"Zone1"
]
},
{
"Class": "Floor",
"Inputs": [
"PCIe2_Inlet"
],
"Name": "PCIe2_Inlet",
"NegativeHysteresis": 1,
"Output": [
60.0,
80.0
],
"PositiveHysteresis": 0,
"Reading": [
60,
70
],
"Type": "Stepwise",
"Zones": [
"Zone1"
]
},
{
"FailSafePercent": 60,
"MinThermalOutput": 60,
"Name": "Zone1",
"Type": "Pid.Zone"
}
],
"Name": "chassis",
"Probe": [
"TRUE"
],
"Type": "Chassis",
"xyz.openbmc_project.Inventory.Decorator.Asset": {
"Manufacturer": "$PRODUCT_MANUFACTURER",
"Model": "$PRODUCT_PRODUCT_NAME",
"PartNumber": "$PRODUCT_PART_NUMBER",
"SerialNumber": "$PRODUCT_SERIAL_NUMBER"
},
"xyz.openbmc_project.Inventory.Decorator.AssetTag": {
"AssetTag": "$PRODUCT_ASSET_TAG"
},
"xyz.openbmc_project.Inventory.Item.System": {}
}
Activity
[-]Not support FAN dual rotator to one present [/-][+]Not support FAN dual rotator to one present pin[/+]pointbazaar commentedon Sep 29, 2025
Can you please trim down your config to a minimal example.