memory_region_init_io(&s->regs_region, &softusb_mmio_ops, s,
"milkymist-softusb", R_MAX * 4);
- sysbus_init_mmio_region(dev, &s->regs_region);
+ sysbus_init_mmio(dev, &s->regs_region);
/* register pmem and dmem */
memory_region_init_ram(&s->pmem, NULL, "milkymist-softusb.pmem",