[PATCH 2/5] dmaengine: sprd: Define the DMA data width type

[Baolin Wang]

Define the DMA data width type to make code more readable.

Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
---
 drivers/dma/sprd-dma.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index af9c156..9f44d6f 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -185,6 +185,14 @@ enum sprd_dma_step {
        SPRD_DMA_DWORD_STEP = BIT(3),
 };
 
+/* dma data width values */
+enum sprd_dma_datawidth {
+       SPRD_DMA_DATAWIDTH_1_BYTE,
+       SPRD_DMA_DATAWIDTH_2_BYTES,
+       SPRD_DMA_DATAWIDTH_4_BYTES,
+       SPRD_DMA_DATAWIDTH_8_BYTES,
+};
+
 /* dma channel hardware configuration */
 struct sprd_dma_chn_hw {
        u32 pause;
@@ -613,15 +621,15 @@ static int sprd_dma_config(struct dma_chan *chan, struct 
sprd_dma_desc *sdesc,
        u32 fix_mode = 0, fix_en = 0;
 
        if (IS_ALIGNED(len, 4)) {
-               datawidth = 2;
+               datawidth = SPRD_DMA_DATAWIDTH_4_BYTES;
                src_step = SPRD_DMA_WORD_STEP;
                des_step = SPRD_DMA_WORD_STEP;
        } else if (IS_ALIGNED(len, 2)) {
-               datawidth = 1;
+               datawidth = SPRD_DMA_DATAWIDTH_2_BYTES;
                src_step = SPRD_DMA_SHORT_STEP;
                des_step = SPRD_DMA_SHORT_STEP;
        } else {
-               datawidth = 0;
+               datawidth = SPRD_DMA_DATAWIDTH_1_BYTE;
                src_step = SPRD_DMA_BYTE_STEP;
                des_step = SPRD_DMA_BYTE_STEP;
        }
-- 
1.7.9.5