The 25 year old winger is rumoured to be interesting a host of Championship clubs but the Latics are the only team known to have made a firm offer.
The offer is believed to be around £850,000 and Bristol City boss O'Driscoll wants the issue sorted before the start of the season.
"I want this settled by the time we get back from Spain and I don't want it dragging on into the season," said O'Driscoll in the Bristol Evening Post.
"If he wants to see out the last year of his contract here, then fine. If we sell him, then I don't have a problem with that either. Albert understands that and is okay with it.
"It is out of my hands to a degree and is down to the powers that be, but hopefully it will be settled quickly.
"I've spoken to Albert and I've told him I just want to bring this thing to a head. Either it is going to happen or it is not.
"The sooner the situation is sorted out one way or the other the better. Until something is decided, there will continue to be speculation and I will not be able to play him."
Adomah has just 12 months remaining on his contract with the AshtonGate club and could leave at the end of the season on a free transfer.
"There is still an offer on the table from Wigan. I've spoken to Owen Coyle and asked if that offer is still kosher and he told me he likes the boy," added O'Driscoll.
"But it is not my money and it is up to others to decide what they want to do and make it clear so we can move on."