Coreboot for Intel's low-power Bay Trail platform is a basic DPTF framework. The DPTF framework for Bay Trail isn't yet complete but is nearly working. DPTF is the Dynamic Platform and Thermal Framework designed for "thin, quiet, and cool platform designs." As explained at 01.org, "Intel DPTF provides mechanisms for platform components and devices to be exposed to individual technologies in a consistent and modular fashion thus enabling a coordinated control of the platform to achieve the power and thermal management goals."
There's also been many other Coreboot changes landing, most of which are related to Bay Trail and readying the support for Bay Trail powered Chromebooks.