Can I get a restraining order for my son due to child abuse?

My son’s father believes in spanking him as punishment. I strongly disagree and that’s part of why he and I broke up. My son came back after visitation with his father with bruises on his bottom and the back of his legs. He says his dad used a belt and punished him for using his father’s computer when he was told not to. I reported this to Tennessee child welfare services. I don’t want to send my son back to his father for the next visit. I’m afraid if I don’t his father will go to my son’s school and pick him up from there. Can I get a restraining order to keep his father away from him and stop him from going to my son’s school or coming to my house based on the child abuse? If I can, what do I need to do to get the restraining order?