TIMBUART_IER
iowrite32(ier, uart->port.membase + TIMBUART_IER);
port->membase + TIMBUART_IER);
iowrite32(0, port->membase + TIMBUART_IER);
uart->last_ier = ioread32(uart->port.membase + TIMBUART_IER);
iowrite32(0, uart->port.membase + TIMBUART_IER);
u32 ier = ioread32(port->membase + TIMBUART_IER) & ~RXFLAGS;
iowrite32(ier, port->membase + TIMBUART_IER);
u32 ier = ioread32(port->membase + TIMBUART_IER) & ~TXBAE;
iowrite32(ier, port->membase + TIMBUART_IER);