diff options
| author |   Baolin Wang <baolin.wang@linaro.org> | 2018-04-19 10:00:47 +0800 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2018-04-27 11:54:55 +0530 |
| commit | d7c33cf8ff4e01e12ad854c92512bf76b5291928 (patch) | |
| tree | 6133f1d7036da1489d23782fbdd24587275bb676 /drivers/dma/sprd-dma.c | |
| parent | dmaengine: sprd: Define the DMA transfer step type (diff) | |
| download | linux-dev-d7c33cf8ff4e01e12ad854c92512bf76b5291928.tar.xz linux-dev-d7c33cf8ff4e01e12ad854c92512bf76b5291928.zip | |
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.c | 14 |
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; } |