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| author | Mika Westerberg <mika.westerberg@iki.fi> | 2011-05-29 13:10:06 +0300 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-06-08 15:46:12 -0600 |
| commit | 626a96db11698119a67eeda130488e869aa6f14e (patch) | |
| tree | 1d5fd7da4a7919596bd81e0136d96679196e1152 /arch/arm/mach-ep93xx/include | |
| parent | 71cebd700257a4f644066631bf02187d8f67817e (diff) | |
| download | linux-626a96db11698119a67eeda130488e869aa6f14e.tar.gz linux-626a96db11698119a67eeda130488e869aa6f14e.tar.bz2 linux-626a96db11698119a67eeda130488e869aa6f14e.zip | |
spi/ep93xx: add DMA support
This patch adds DMA support for the EP93xx SPI driver. By default the DMA is
not enabled but it can be enabled by setting ep93xx_spi_info.use_dma to true
in board configuration file.
Note that the SPI driver still uses PIO for small transfers (<= 8 bytes) for
performance reasons.
Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/arm/mach-ep93xx/include')
| -rw-r--r-- | arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h b/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h index 0a37961b3453..9bb63ac13f04 100644 --- a/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h +++ b/arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h @@ -7,9 +7,11 @@ struct spi_device; * struct ep93xx_spi_info - EP93xx specific SPI descriptor * @num_chipselect: number of chip selects on this board, must be * at least one + * @use_dma: use DMA for the transfers */ struct ep93xx_spi_info { int num_chipselect; + bool use_dma; }; /** |