RE: [PATCH v2] ARM: PL011: Add support for Rx DMA buffer polling

[Chanho Min]

>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?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/