ACPI & Power Management Updates For Linux 4.5

Intel's Rafael Wysocki has sent in the refreshed ACPI and power management code that's targeting the Linux 4.5 kernel merge window.

Of interest with these updates is a debugfs interface for communicating with ACPICA's new AML debugger so it can be accessed from a new user-space tool, more efficient handling of CPUfreq governors, many CPUfreq driver changes (including Intel's P-state driver), and updates to the device properties framework.

The P-State driver work includes improvements to benefit Atom CPUs based on Airmont and Silvermont for lower energy consumption. The ACPI driver for AMD SoCs has also been updated to support the APM X-Gene ACPI I2C device.

More details on these power management improvements for the Linux 4.5 kernel can be found via this pull request.