On Mon, Jan 28, 2013 at 9:15 AM, Chanho Min <chanho.min@xxxxxxx> wrote: > [Russell] >>Well, I thought I had explained that I'd prefer to see the poll rate >>adjusted with the baud rate, but maybe I wasn't explicit enough. >>Instead, what we seem to have ended up with are two new entries in >>platform data (which we're trying to get away from with DT): >> >>+ unsigned int dma_rx_poll_rate; >>+ unsigned int dma_rx_poll_timeout; >> >>If this were to be done, then receive DMA could be used on the Versatile >>PB platforms without having it suck CPU usage unnecessarily at slower >>baud rates. > This patch is working well on our pl011+ pl080 platform. > If no data is received during time-out, no tick timer works. > Do you want to adjust the poll rate with the baud rate additionally? I'm not following, you wrote earlier in the thread: >>Should we scale the polling interval according to baud >>rate? > > It is also our concern, I will suggest the proper way. We are waiting for you suggestion, i.e. a new patch iteration taking this into account. Yours, Linus Walleij -- 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
