map_regs
ret = map_regs(v3d, &v3d->hub_regs, "hub");
ret = map_regs(v3d, &v3d->core_regs[0], "core0");
ret = map_regs(v3d, &v3d->sms_regs, "sms");
ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
ret = map_regs(v3d, &v3d->gca_regs, "gca");
rv = map_regs(pdev, &video, &mgbdev->video);
rv = map_regs(pdev, &cmt, &mgbdev->cmt);