dw_dmac: store direction in the custom channel structure

Currently the direction value comes from the generic slave configuration
structure and explicitly as a preparation function parameter. The first one is
kinda obsoleted. Thus, we have to store the value passed to the preparation
function somewhere in our structures to be able to use it later. The best
candidate to provide the storage is a custom channel structure. Until now we
still keep and check the direction field of the slave config structure as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/dma/dw_dmac_regs.h b/drivers/dma/dw_dmac_regs.h
index 8881e9b277a3..f9532c29b808 100644
--- a/drivers/dma/dw_dmac_regs.h
+++ b/drivers/dma/dw_dmac_regs.h
@@ -9,6 +9,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/dmaengine.h>
 #include <linux/dw_dmac.h>
 
 #define DW_DMA_MAX_NR_CHANNELS  8
@@ -184,12 +185,13 @@ enum dw_dmac_flags {
 };
 
 struct dw_dma_chan {
-        struct dma_chan         chan;
-        void __iomem            *ch_regs;
-        u8                      mask;
-        u8                      priority;
-        bool                    paused;
-        bool                    initialized;
+        struct dma_chan                 chan;
+        void __iomem                    *ch_regs;
+        u8                              mask;
+        u8                              priority;
+        enum dma_transfer_direction     direction;
+        bool                            paused;
+        bool                            initialized;
 
         /* software emulation of the LLP transfers */
         struct list_head        *tx_list;