Cool [Q] Set Camera button to end call?

I was wondering if there is any possible way to have to camera button end a call while on a call, and work regularly as the camera button usually does when not on a call. I know there is an option to have to power button end the call, but I prefer to power button to turn the screen of during a call so I don't accidentally hit mute / hangup / dialpad with my face.

So, is it possible?