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>
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 8207954..cc9f1d4 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -488,11 +488,15 @@
},
};
+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,