mobile

I'm looking for an app that will let me increase the minimum CPU frequency, but only when bluetooth is active. I don't want it messing with the CPU at any other time because I'd prefer the better battery life of the resting speed. I want it to turn on and set the new minimum when I turn bluetooth on, and turn itself off and go back to system defaults when I turn bluetooth off.

Anyone know of one? I'm rooted so that's not a concern.