dmaengine: sprd: Define the DMA data width type

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

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index dcfa417..65ff0a5 100644 (file)
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -176,6 +176,14 @@ enum sprd_dma_int_type {
        SPRD_DMA_CFGERR_INT,
 };
 
+/* 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;
@@ -604,15 +612,15 @@ 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;
        }