I'm trying to build a image for my Overo where I can reduce the power consumption (PM). As I see in this post http://old.nabble.com/sample-numbers-for-Overo-Earth-power-consumption-td29792431.html I need a Linux Omap3 PM kernel.
I have modified the overo config file (org.openembedded.dev/conf/machine/overo.conf) to include PREFERRED_PROVIDER_virtual/kernel = "linux-omap-pm", and not "linux-omap3". Then I build a simple omap3-console-image (bitbake omap3-console-image), that include the last linux-omap-pm linux kernel recipe version  (the default last version is 2.6.29, recipes/linux/linux-omap-pm_2.6.29.bb).
Is this the correct way to build it?
 
Thanks