UART_INTR
unsigned int ctl = readl(port->membase + UART_INTR(port));
writel(ctl, port->membase + UART_INTR(port));
ctl = readl(port->membase + UART_INTR(port));
writel(ctl, port->membase + UART_INTR(port));
ctl = readl(port->membase + UART_INTR(port));
writel(ctl, port->membase + UART_INTR(port));
ctl = readl(port->membase + UART_INTR(port));
writel(ctl, port->membase + UART_INTR(port));
writel(0, port->membase + UART_INTR(port));
intr = readl(port->membase + UART_INTR(port)) &
writel(0, port->membase + UART_INTR(port));
ctl = intr | readl(port->membase + UART_INTR(port));
writel(ctl, port->membase + UART_INTR(port));
mvuart->pm_regs.intr = readl(port->membase + UART_INTR(port));
writel(mvuart->pm_regs.intr, port->membase + UART_INTR(port));