Hi,
The Powertop Linaro-2012.12 release is available[1] based on upstream v2.2 version. The upstream v2.2 minor release mainly includes bug fixes and new report generator facility. Detailed notes available at [2].
Powertop Linaro-2012.12 release highlights - Bug fix to display freq stats when cpuidle is not enabled - Devfreq support to display devfreq device freq stats
[1] http://git.linaro.org/gitweb?p=tools/powertop-2.0.git [2] http://lists.01.org/pipermail/powertop/2012-November/000619.html