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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/core.c | |
| parent | 71cebd700257a4f644066631bf02187d8f67817e (diff) | |
| download | talos-op-linux-626a96db11698119a67eeda130488e869aa6f14e.tar.gz talos-op-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/core.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/core.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index 82079545adc4..cc9f1d4b104d 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -488,11 +488,15 @@ static struct resource ep93xx_spi_resources[] = { }, }; +static u64 ep93xx_spi_dma_mask = DMA_BIT_MASK(32); + static struct platform_device ep93xx_spi_device = { .name = "ep93xx-spi", .id = 0, .dev = { - .platform_data = &ep93xx_spi_master_data, + .platform_data = &ep93xx_spi_master_data, + .coherent_dma_mask = DMA_BIT_MASK(32), + .dma_mask = &ep93xx_spi_dma_mask, }, .num_resources = ARRAY_SIZE(ep93xx_spi_resources), .resource = ep93xx_spi_resources, |
