__devm_request_region
dev_res = __devm_request_region(port->dev, &res, res.start,
__devm_request_region(dev, &ioport_resource, (start), (n), (name))
__devm_request_region(dev, &iomem_resource, (start), (n), (name))
extern struct resource * __devm_request_region(struct device *dev,
EXPORT_SYMBOL(__devm_request_region);
return __devm_request_region(dev, parent, start, n, name);