DMA: AT91: Get transfer width

In one dma transfer, the data transfer width can be configured and it is limited by source or destination peripheral width,
tx_width will save the transfer width, but for memcpy, either source or destination transfer width is taken as tx_width.

Signed-off-by: Elen Song <elen.song@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h
index c604d26fd4d3..3679933fb646 100644
--- a/drivers/dma/at_hdmac_regs.h
+++ b/drivers/dma/at_hdmac_regs.h
@@ -182,6 +182,7 @@ struct at_lli {
  * @txd: support for the async_tx api
  * @desc_node: node on the channed descriptors list
  * @len: total transaction bytecount
+ * @tx_width: transfer width
  */
 struct at_desc {
         /* FIRST values the hardware uses */
@@ -192,6 +193,7 @@ struct at_desc {
         struct dma_async_tx_descriptor  txd;
         struct list_head                desc_node;
         size_t                          len;
+        u32                             tx_width;
 };
 
 static inline struct at_desc *