Kernel driver ibm-cffps

Supported chips:

  • IBM Common Form Factor power supply

Author: Eddie James <>


This driver supports IBM Common Form Factor (CFF) power supplies. This driver is a client to the core PMBus driver.

Usage Notes

This driver does not auto-detect devices. You will have to instantiate the devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for details.

Sysfs entries

The following attributes are supported:

curr1_alarm Output current over-current alarm.
curr1_input Measured output current in mA.
curr1_label “iout1”
fan1_alarm Fan 1 warning.
fan1_fault Fan 1 fault.
fan1_input Fan 1 speed in RPM.
fan2_alarm Fan 2 warning.
fan2_fault Fan 2 fault.
fan2_input Fan 2 speed in RPM.
in1_alarm Input voltage under-voltage alarm.
in1_input Measured input voltage in mV.
in1_label “vin”
in2_alarm Output voltage over-voltage alarm.
in2_input Measured output voltage in mV.
in2_label “vout1”
power1_alarm Input fault or alarm.
power1_input Measured input power in uW.
power1_label “pin”
temp1_alarm PSU inlet ambient temperature over-temperature alarm.
temp1_input Measured PSU inlet ambient temp in millidegrees C.
temp2_alarm Secondary rectifier temp over-temperature alarm.
temp2_input Measured secondary rectifier temp in millidegrees C.
temp3_alarm ORing FET temperature over-temperature alarm.
temp3_input Measured ORing FET temperature in millidegrees C.