Messages in this thread Patch in this message |  | | From | Baolin Wang <> | Subject | [PATCH v2 2/5] dmaengine: sprd: Define the DMA data width type | Date | Thu, 19 Apr 2018 10:00:47 +0800 |
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Define the DMA data width type to make code more readable.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org> --- Changes since v1: - No updates. --- 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 dcfa417..65ff0a58 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; } -- 1.7.9.5
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