On Tue, Feb 28, 2012 at 06:46:12PM +0900, Chanho Min wrote: > > Because the flags are manipulated to give the illusion of a one byte > > FIFO, as stated in the TRM. > Yes. It is the problem that rx interrupt is pended with this status as > I mentioned. Which is why my patch explicitly clears the receive interrupt status before requesting the interrupt. Have you read my patch? > > And we don't set the mask register to 1 until later. > In the last part of startup, set to 1. Interrupt can be occurred just > after it. > > uap->im = UART011_RTIM; > if (!pl011_dma_rx_running(uap)) > uap->im |= UART011_RXIM; > writew(uap->im, uap->port.membase + UART011_IMSC); > > > But we want to do the transmit interrupt provocation with the FIFO disabled. > I know. It's test only. Wrong, it's fundamental to the UARTs operation. -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
