WS16C48_EXTENT
#define MAX_NUM_WS16C48 max_num_isa_dev(WS16C48_EXTENT)
if (!devm_request_region(dev, base[id], WS16C48_EXTENT, name)) {
base[id], base[id] + WS16C48_EXTENT);
regs = devm_ioport_map(dev, base[id], WS16C48_EXTENT);