serial8250_pci_setup_port
err = serial8250_pci_setup_port(pcidev, port, 0, offset, board->reg_shift, priv->virt);
ret = serial8250_pci_setup_port(pcidev, port, 0, offset, 0, priv->virt);
return serial8250_pci_setup_port(priv->dev, port, bar, offset, regshift, iomem);
ret = serial8250_pci_setup_port(pdev, port, 0, PORT_OFFSET * port_idx, 0, priv->membase);
EXPORT_SYMBOL_NS_GPL(serial8250_pci_setup_port, "SERIAL_8250_PCI");
int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port, u8 bar,