The T5 object may have various sizes depending on the objects used on the particular maXTouch chip and firmware version, therefore it can't be hardcoded in the driver. Allocate a buffer on probe instead. Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk> Acked-by: Benson Leung <bleung@chromium.org> Acked-by: Yufeng Shen <miletus@chromium.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>