The apology stems from an incident on Jan. 3, when Valentine turned his back on Berry while the guard attempted to discuss a non-call with the official during a loss to Florida State.
Valentine was removed from two Big Ten games that he'd been scheduled to work as a result and even briefly mulled retirement before returning to work.
Berry and Valentine talked briefly, with both smiling as they gave each other a brief embrace.
Berry said Valentine "made sure that there was nothing wrong between us, and I told him it was all good.''
Berry told reporters that he didn't think it was a big deal, but appreciated Valentine's apology.
"You can have a learning experience at any age," Berry said.