s5 at&t sm-g900a rooting or permissive topic

ok so im trying to root my s5 so i can use my app radio touch screen function. Towel root doesn't work on my phone because its a newer kernal and has been "fixed". I was wondering if there was any other way to root my phone or at least make it permissive so i can use my app radio touch screen function to control the phone. I see there is talk about the guy who made the towel root working for google now so there is no way of getting an updated towel root. Anyone have any ideas?