LPC32XX_UART_IIR_FCR
__raw_writel(0xC1, LPC32XX_UART_IIR_FCR(puart));
__raw_writel(0, LPC32XX_UART_IIR_FCR(puart));
__raw_writel(0xC1, LPC32XX_UART_IIR_FCR(puart));
__raw_writel(0, LPC32XX_UART_IIR_FCR(puart));