PCI_PTM_GRANULARITY_MASK
reg &= ~(PCI_PTM_CAP_RES | PCI_PTM_GRANULARITY_MASK);
FIELD_MODIFY(PCI_PTM_GRANULARITY_MASK, &ctrl, dev->ptm_granularity);
dev->ptm_granularity = FIELD_GET(PCI_PTM_GRANULARITY_MASK, cap);