UART010_LCRH
lcr_h = readb(port->membase + UART010_LCRH);
writel(lcr_h, port->membase + UART010_LCRH);
writel(readb(port->membase + UART010_LCRH) &
port->membase + UART010_LCRH);
writel(lcr_h, port->membase + UART010_LCRH);
lcr_h = readb(uap->port.membase + UART010_LCRH);