dma: Support for 3 bytes word size

Add DMA_SLAVE_BUSWIDTH_3_BYTES to dma_slave_buswidth for engines and users
to select 3 bytes as bus width.
For example eDMA can be configured to use 3bytes mode and in audio we have
formats stored on 3bytes in memory (_XXX_3LE) where this new bus width can
be used.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index d2c5cc7c583c..3d1c2aa51530 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -299,6 +299,7 @@ enum dma_slave_buswidth {
         DMA_SLAVE_BUSWIDTH_UNDEFINED = 0,
         DMA_SLAVE_BUSWIDTH_1_BYTE = 1,
         DMA_SLAVE_BUSWIDTH_2_BYTES = 2,
+        DMA_SLAVE_BUSWIDTH_3_BYTES = 3,
         DMA_SLAVE_BUSWIDTH_4_BYTES = 4,
         DMA_SLAVE_BUSWIDTH_8_BYTES = 8,
 };