Adebola, who spent a month on loan at Oldham towards the end of last season, is out of contract at St Andrews and is spending the next few days training with the Pompey squad and could play some part in their friendly against Chelsea on Saturday.
Adebola, a £1million signing from Crewe in 1998, has a chance to make the move to the south coast club permanent if he impresses Portsmouth manager Harry Redknapp over the next few days.