POWER On-Chip Controller Driver Coming For Linux 4.21
Written by Michael Larabel in Hardware on 10 November 2018 at 07:16 AM EST. 3 Comments
HARDWARE --
The IBM POWER On-Chip Controller (OCC) driver is queued for inclusion in the next version of the Linux kernel. This on-chip controller driver collects sensor data from the system and processor, including temperature and power metrics, and exposes that to the user as well as handling thermal/power management tasks.

The on-chip controller is embedded into POWER processors with P8/P9 processors. The newly-queued OCC driver exposes via sysfs temperatures, frequencies, power usage, power capacity/minimum/maximums, and other sensor data. The OCC driver documentation covers the information in more detail.


The POWER OCC code is currently queued in hwmon-next for introduction in the next cycle that will be Linux 4.21 unless Linus Torvalds decides to rename that next kernel release to Linux 5.0.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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