Thompson damaged knee ligaments against Sheffield United late in the season and had feared he would not be fit for the start of the season.
However he said: "The knee has responded very well and I am now looking forward.
"The physios have done a great job but now I want to put this behind me.
"I will be 100% fit for the start of pre-season, which is a massive boost for me."
Cruciate ligament victim Jack Lester may also be fit in time for the start of the season.