Barton appeared to distance himself from suggestions on Wednesday by his agent Willie McKay that he might join Everton, the club he supported as a boy.
"It's well known who I support. It doesn't take a rocket scientist to work that out," Barton wrote on Twitter.
"Good football agents will always be looking to move players, that's how they make money.
"Recent rumours are slightly wide of the mark, everyone knows where I would like to end up, in France, playing in the Champions League for Olympique Marseille, nothing has changed my end.
"If not, I am contracted to QPR and will give my all to help them regain their Premier League status.
"If something happens and both clubs decide differently, than I will assess my options."
Marseille are keen to have him back at the Stade Velodrome but believe it is up to Barton to negotiate an exit settlement with QPR.