Define the DMA data width type to make code more readable.
Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx>
---
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
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