CDNS_UART_MR
mode_reg = readl(port->membase + CDNS_UART_MR);
writel(mode_reg, port->membase + CDNS_UART_MR);
writel(mr, port->membase + CDNS_UART_MR);
mreg = readl(port->membase + CDNS_UART_MR);
writel(mreg, port->membase + CDNS_UART_MR);
mode_reg = readl(port->membase + CDNS_UART_MR);
writel(cval, port->membase + CDNS_UART_MR);
port->membase + CDNS_UART_MR);