dmaengine: ep93xx_dma: remove dma_slave_config direction usage

dma_slave_config direction was marked as deprecated quite some
time back, remove the usage from this driver so that the field
can be removed
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/ep93xx_dma.c

@@ -109,6 +109,9 @@
 #define DMA_MAX_CHAN_DESCRIPTORS	32
 
 struct ep93xx_dma_engine;
+static int ep93xx_dma_slave_config_write(struct dma_chan *chan,
+					 enum dma_transfer_direction dir,
+					 struct dma_slave_config *config);
 
 /**
  * struct ep93xx_dma_desc - EP93xx specific transaction descriptor
@@ -180,6 +183,7 @@ struct ep93xx_dma_chan {
 	struct list_head		free_list;
 	u32				runtime_addr;
 	u32				runtime_ctrl;
+	struct dma_slave_config		slave_config;
 };
 
 /**
@@ -1051,6 +1055,8 @@ ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 		return NULL;
 	}
 
+	ep93xx_dma_slave_config_write(chan, dir, &edmac->slave_config);
+
 	first = NULL;
 	for_each_sg(sgl, sg, sg_len, i) {
 		size_t len = sg_dma_len(sg);
@@ -1136,6 +1142,8 @@ ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
 		return NULL;
 	}
 
+	ep93xx_dma_slave_config_write(chan, dir, &edmac->slave_config);
+
 	/* Split the buffer into period size chunks */
 	first = NULL;
 	for (offset = 0; offset < buf_len; offset += period_len) {
@@ -1227,6 +1235,17 @@ static int ep93xx_dma_slave_config(struct dma_chan *chan,
 				   struct dma_slave_config *config)
 {
 	struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
+
+	memcpy(&edmac->slave_config, config, sizeof(*config));
+
+	return 0;
+}
+
+static int ep93xx_dma_slave_config_write(struct dma_chan *chan,
+					 enum dma_transfer_direction dir,
+					 struct dma_slave_config *config)
+{
+	struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
 	enum dma_slave_buswidth width;
 	unsigned long flags;
 	u32 addr, ctrl;
@@ -1234,7 +1253,7 @@ static int ep93xx_dma_slave_config(struct dma_chan *chan,
 	if (!edmac->edma->m2m)
 		return -EINVAL;
 
-	switch (config->direction) {
+	switch (dir) {
 	case DMA_DEV_TO_MEM:
 		width = config->src_addr_width;
 		addr = config->src_addr;