[PATCH] dmaengine: add dma_ctrl_cmd to pass buffer stride configuration

[Sundaram Raju]

Added new dma_ctrl_cmd TI_DMA_STRIDE_CONFIG to pass the TI DMA
controller specific configurations on how a buffer must be walked
through and how data is picked for transfer based on a specified
pattern over the channel.

The configuration passed is specific to the TI DMA controller used.

Signed-off-by: Sundaram Raju <sundaram at ti.com>
---
 include/linux/dmaengine.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index eee7add..51dadc4 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -123,6 +123,10 @@ enum dma_ctrl_flags {
  * command.
  * @FSLDMA_EXTERNAL_START: this command will put the Freescale DMA controller
  * into external start mode.
+ * @TI_DMA_STRIDE_CONFIG: this command is only implemented by TI DMA
+ * controllers that need to pass special configuration on how to walk through
+ * the buffer to pick up data in a specified pattern to be transferred in
+ * the channel.
  */
 enum dma_ctrl_cmd {
 	DMA_TERMINATE_ALL,
@@ -130,6 +134,7 @@ enum dma_ctrl_cmd {
 	DMA_RESUME,
 	DMA_SLAVE_CONFIG,
 	FSLDMA_EXTERNAL_START,
+	TI_DMA_STRIDE_CONFIG,
 };
 
 /**
-- 
1.6.2.4