SAN FRANCISCO — After four years, former longtime Pillsbury Winthrop Shaw Pittman partner and former Bank of America General Counsel Michael Halloran is returning to the Bay Area — at least part time.

On this round, he’s coming in with Texas firm Haynes and Boone. Halloran, who joined at the start of April as equity partner, will split his time between Haynes and Boone’s San Jose and Washington, D.C., offices, he said.