DB2K_REF_DACS_SET 628 drivers/staging/comedi/drivers/daqboard2000.c writew(DB2K_REF_DACS_SET | DB2K_REF_DACS_SELECT_POS_REF, DB2K_REF_DACS_SET 638 drivers/staging/comedi/drivers/daqboard2000.c writew(DB2K_REF_DACS_SET | DB2K_REF_DACS_SELECT_NEG_REF,