I request a method of preparing a board-specific funcions: sfp_present and sfp_read_part_id (currently defined in dev/sfp.c). The preferred method would be to enable defining them in boards/boardname/board.c.

I'm working on support of a board that requires setting up a few i2c muxes to access sfp via i2c. On the same board sfp present is accessable via i2c-gpio extender.