Kernel driver corsair-psu

Supported devices:

• Corsair Power Supplies

  Corsair HX550i

  Corsair HX650i

  Corsair HX750i

  Corsair HX850i

  Corsair HX1000i (Series 2022 and 2023)

  Corsair HX1200i

  Corsair HX1500i (Series 2022 and 2023)

  Corsair RM550i

  Corsair RM650i

  Corsair RM750i

  Corsair RM850i

  Corsair RM1000i

Author: Wilken Gottwalt

Description

This driver implements the sysfs interface for the Corsair PSUs with a HID protocol interface of the HXi and RMi series. These power supplies provide access to a micro-controller with 2 attached temperature sensors, 1 fan rpm sensor, 4 sensors for volt levels, 4 sensors for power usage and 4 sensors for current levels and additional non-sensor information like uptimes.

Sysfs entries

curr1_input	Total current usage
curr2_input	Current on the 12v psu rail
curr2_crit	Current max critical value on the 12v psu rail
curr3_input	Current on the 5v psu rail
curr3_crit	Current max critical value on the 5v psu rail
curr4_input	Current on the 3.3v psu rail
curr4_crit	Current max critical value on the 3.3v psu rail
fan1_input	RPM of psu fan
in0_input	Voltage of the psu ac input
in1_input	Voltage of the 12v psu rail
in1_crit	Voltage max critical value on the 12v psu rail
in1_lcrit	Voltage min critical value on the 12v psu rail
in2_input	Voltage of the 5v psu rail
in2_crit	Voltage max critical value on the 5v psu rail
in2_lcrit	Voltage min critical value on the 5v psu rail
in3_input	Voltage of the 3.3v psu rail
in3_crit	Voltage max critical value on the 3.3v psu rail
in3_lcrit	Voltage min critical value on the 3.3v psu rail
power1_input	Total power usage
power2_input	Power usage of the 12v psu rail
power3_input	Power usage of the 5v psu rail
power4_input	Power usage of the 3.3v psu rail
pwm1	PWM value, read only
pwm1_enable	PWM mode, read only
temp1_input	Temperature of the psu vrm component
temp1_crit	Temperature max cirtical value of the psu vrm component
temp2_input	Temperature of the psu case
temp2_crit	Temperature max critical value of psu case

Usage Notes

It is an USB HID device, so it is auto-detected, supports hot-swapping and several devices at once.

Flickering values in the rail voltage levels can be an indicator for a failing PSU. Accordingly to the default automatic fan speed plan the fan starts at about 30% of the wattage rating. If this does not happen, a fan failure is likely. The driver also provides some additional useful values via debugfs, which do not fit into the hwmon class.

Debugfs entries

ocpmode	Single or multi rail mode of the PCIe power connectors
product	Product name of the psu
uptime	Session uptime of the psu
uptime_total	Total uptime of the psu
vendor	Vendor name of the psu