dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic

Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to allow passing client/target specific information associated
with the data transfer.
Modify all affected DMA engine drivers.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 7d7384b34621..8f84761f98ba 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -759,6 +759,7 @@ fail:
  * @sg_len: number of entries in @scatterlist
  * @direction: DMA direction
  * @flags: DMAEngine flags
+ * @context: transaction context (ignored)
  *
  * Prepare a set of descriptors for a DMA_SLAVE transaction. Following the
  * DMA_SLAVE API, this gets the device-specific information from the
@@ -766,7 +767,8 @@ fail:
  */
 static struct dma_async_tx_descriptor *fsl_dma_prep_slave_sg(
         struct dma_chan *dchan, struct scatterlist *sgl, unsigned int sg_len,
-        enum dma_transfer_direction direction, unsigned long flags)
+        enum dma_transfer_direction direction, unsigned long flags,
+        void *context)
 {
         /*
          * This operation is not supported on the Freescale DMA controller