CDNS_UART_MODEMCR
val = readl(port->membase + CDNS_UART_MODEMCR);
writel(val, port->membase + CDNS_UART_MODEMCR);
val = readl(port->membase + CDNS_UART_MODEMCR);
writel(val, port->membase + CDNS_UART_MODEMCR);
val = readl(cdns_uart->port->membase + CDNS_UART_MODEMCR);
writel(val, cdns_uart->port->membase + CDNS_UART_MODEMCR);
cval = readl(port->membase + CDNS_UART_MODEMCR);
writel(cval, port->membase + CDNS_UART_MODEMCR);