res_size = resource_size(&res);
 
        if (!request_mem_region(res.start, res_size, DRV_NAME)) {
-               dev_err(&ofdev->dev, "couldn't request %#llx..%#llx\n",
-                       (unsigned long long)res.start,
-                       (unsigned long long)res.end);
+               dev_err(&ofdev->dev, "couldn't request %pR\n", &res);
                return -EBUSY;
        }
 
        base = ioremap_nocache(res.start, res_size);
        if (!base) {
-               dev_err(&ofdev->dev, "couldn't ioremap %#llx..%#llx\n",
-                       (unsigned long long)res.start,
-                       (unsigned long long)res.end);
+               dev_err(&ofdev->dev, "couldn't ioremap %pR\n", &res);
                err = -ENOMEM;
                goto exit_release_mem;
        }