pci_bus_to_OF_node
dn = pci_bus_to_OF_node(bus);
struct device_node *dn = pci_bus_to_OF_node(bus);
if (pci_bus_to_OF_node(bus) == dn)
dn = pci_bus_to_OF_node(pbus);
struct device_node *node = pci_bus_to_OF_node(bus);
dn = pci_bus_to_OF_node(bus);
dn = pci_bus_to_OF_node(bus);
ppnode = pci_bus_to_OF_node(pdev->bus);
np = pci_bus_to_OF_node(bridge->bus);
if (pci_bus_to_OF_node(bridge->bus))
pnode = pci_bus_to_OF_node(pdev->bus);