Holt had four years at Norwich.
"I never really got to say goodbye, to be honest," said Holt. "It's always difficult when you leave in the summer. You don't get to say goodbye to everyone and not just the fans, but the people at the club.
"I've made some good friends there along the way and hopefully I'll get back and see them in a few weeks' time when I go down and tie a few loose ends up.
"And then hopefully at some point we'll either get them in the cup or get us promoted this year and play them in the Premier League next year, and I'll get the chance to go back and get a good welcome."