The PS4's compatibility shouldn't be any different then the PS3's. If it works on a PS3, it should work no problem on a PS4. All you really need is a cheap keyboard, no need for a gaming keyboard. You should be able to get one for 10 bucks at wal mart.

If you don't have a keyboard, or until you can buy the one you want if you want a certain one, I would recommend creating some general communication macros. They're not perfect, but they're better then nothing.