RDA_UART_IRQ_CAUSE  415 drivers/tty/serial/rda-uart.c 	val = rda_uart_read(port, RDA_UART_IRQ_CAUSE);
RDA_UART_IRQ_CAUSE  416 drivers/tty/serial/rda-uart.c 	rda_uart_write(port, val, RDA_UART_IRQ_CAUSE);