Linux 4.2 Power Management Update Yields More ACPI 6 Changes

Open-source developers for a while have been working on ACPI 6 support for Linux with 64-bit ARM support, ACPI 6 NV-DIMM support, and other functionality. With the Linux 4.2 kernel that's now in-development, more ACPI 6 code will be landing.

Rafael Wysocki of Intel sent in the power management and ACPI updates on Monday for landing in the Linux 4.2 merge window. This update pulls in the latest ACPICA code, including the new ACPI 6 material. There's also an update to the ACPI device power management core for following ACPI 6 and other changes. Following ACPI 6 in turn reflects the ACPI device power management implementation on Windows.

This PM/ACPI pull for Linux 4.2 also has battery driver clean-ups, processor driver updates, CPUfreq driver changes, and a long assortment of other fixes. Intel's Xeon Phi "Knights Landing" is also now supported by the Intel RAPL (Runtime Average Power Limiting) driver.

More details on these power management changes for the next version of the Linux kernel can be found via this pull request.