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authorBaolin Wang <baolin.wang@linaro.org>2018-04-19 05:00:47 +0300
committerVinod Koul <vkoul@kernel.org>2018-04-27 09:24:55 +0300
commitd7c33cf8ff4e01e12ad854c92512bf76b5291928 (patch)
tree6133f1d7036da1489d23782fbdd24587275bb676 /drivers/dma/sprd-dma.c
parent6b1d255ecde522ac961226b22321f417c62b2435 (diff)
downloadlinux-d7c33cf8ff4e01e12ad854c92512bf76b5291928.tar.xz
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>
Diffstat (limited to 'drivers/dma/sprd-dma.c')
-rw-r--r--drivers/dma/sprd-dma.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index dcfa4179bf9e..65ff0a583615 100644
--- 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;
}