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serial: pl011: use DMA RX polling by default 

Making DMA RX polling optional when DMA is on was just
over-cautious: there is one single system in the kernel tree
using this facility, Ux500 and after some testing I turned
this on also for Ux500, which means it should simply be on
by default if DMA is enabled.

Cc: Jongsung Kim <neidhard.kim@lge.com>
Cc: Chanho Min <chanho.min@lge.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Linus Walleij 2013-11-28 10:41:04 +01:00 committed by Greg Kroah-Hartman
parent d0ce850d60
commit 17438217a6
2 changed files with 1 additions and 2 deletions
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2
drivers/tty/serial/amba-pl011.c
View File

@ -325,7 +325,7 @@ static void pl011_dma_probe_initcall(struct device *dev, struct uart_amba_port *
dmaengine_slave_config(chan, &rx_conf); dmaengine_slave_config(chan, &rx_conf);
uap->dmarx.chan = chan; uap->dmarx.chan = chan;
if (plat && plat->dma_rx_poll_enable) { if (plat) {
/* Set poll rate if specified. */ /* Set poll rate if specified. */
if (plat->dma_rx_poll_rate) { if (plat->dma_rx_poll_rate) {
uap->dmarx.auto_poll_rate = false; uap->dmarx.auto_poll_rate = false;

1
include/linux/amba/serial.h
View File

@ -203,7 +203,6 @@ struct amba_pl011_data {
bool (*dma_filter)(struct dma_chan *chan, void *filter_param); bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
void *dma_rx_param; void *dma_rx_param;
void *dma_tx_param; void *dma_tx_param;
bool dma_rx_poll_enable;
unsigned int dma_rx_poll_rate; unsigned int dma_rx_poll_rate;
unsigned int dma_rx_poll_timeout; unsigned int dma_rx_poll_timeout;
void (*init) (void); void (*init) (void);