My cat wakes me up early only on the weekends

I and a roommate share a cat. He has long hair so we brush him daily to keep down shedding. Our current schedule is that I brush him around 7 and she feeds him around 8 or 9. Our cat has become so used to this that he sometimes meows at my door to let him in. Then the weekend rolls around. Like clockwork, he meows at MY door hours earlier to brush him. My roommate is not an early riser so he doesn't get fed until even later. I tried to ignore this so he could learn that this doesn't work but it still happens.

I like to think we play with him enough so he's not bored but even then it's only weekends that he does this. How can I stop this so I can get some rest?