it's because of the phone app is buggy. each time u start the phone app the freq will drop to 125 mhz. this is a known bug and it is fixed in the power kernel by adding 125 mhz to the tuneable value avoid_frequencies. u want to load a default setting with kernel-config load default and then override the limits with kernel-config limits x,y. u don't need to load a userspace driver. Or u want to read the wiki page about overclocking. u want to try my tools too.