DIO48E_EXTENT
if (!devm_request_region(dev, base[id], DIO48E_EXTENT, name)) {
base[id], base[id] + DIO48E_EXTENT);
regs = devm_ioport_map(dev, base[id], DIO48E_EXTENT);
#define MAX_NUM_DIO48E max_num_isa_dev(DIO48E_EXTENT)