The former Manchester City and Newcastle man made the loan move to France in August 2012, when Mark Hughes was in charge at Loftus Road.
|SHOULD I STAY OR SHOULD I GO?
BARTON'S MOVE 'DILEMMA'
"I want to stay here but it does not depend on me," Barton told TF1 after Saturday's victory over Lorient. "I belong to another club.
"I had a discussion with QPR and I might stay here, but the most important thing is to qualify for the Champions League. Then we can discuss my future.
"Everyone knows how much I love this club and if it were up to me I would finish my career here."
Redknapp admitted it might be difficult to convince Barton to return to QPR next season.
"Joey has done well," he said. "He’s had a great season for them. He’s a good player but, if you saw where Joey lived in Marseille, I think it would be very difficult to get him back."