The Reverse-Engineered Corsair PSU Linux Driver Continues To Be Improved Upon

Written by Michael Larabel in Hardware on 15 March 2021 at 12:00 AM EDT. 20 Comments
Added for Linux 5.11 was an independently-developed, reverse-engineered Corsair power supply driver for the company's desktop PSUs supporting their USB-based "LINK" interface for exposing voltage, temperature, current, and Wattage under Linux. This open-source "corsair-psu" driver has continued maturing as well since being mainlined.

The Corsair-PSU driver was added to Linux 5.11 and supports Corsair LINK-enabled power supplies such as the RMi / HXi / AXi power supply families. This driver is a conventional HWMON driver and allows for the sensors to be exposed through conventional sysfs interfaces for easy querying by user-space tools.

The latest Corsair power supply driver improvement that's pending is critical value handling. With a new patch sent out this weekend by Corsair-PSU driver developer Wilken Gottwalt there is now support for critical value handling for temperatures, voltage, and current. This is handled similarly to other critical value HWMON drivers. Details on this latest addition via this patch.

Assuming no issues crop up, the patch will likely be mainlined with the Linux 5.13 cycle.
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