DAS16M1_8255_IOBASE
ret = __comedi_request_region(dev, dev->iobase + DAS16M1_8255_IOBASE,
devpriv->extra_iobase = dev->iobase + DAS16M1_8255_IOBASE;
ret = subdev_8255_io_init(dev, s, DAS16M1_8255_IOBASE);