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dmaengine: sprd: Define the DMA transfer step type

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Define the DMA transfer step type to make code more readable.

Signed-off-by: Eric Long <eric.long@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Eric Long 2018-04-19 10:00:46 +08:00 committed by Vinod Koul
parent 60cc43fc88
commit 6b1d255ecd
1 changed files with 13 additions and 6 deletions
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19
drivers/dma/sprd-dma.c
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@ -116,6 +116,13 @@
#define SPRD_DMA_SRC_TRSF_STEP_OFFSET 0
#define SPRD_DMA_TRSF_STEP_MASK GENMASK(15, 0)
/* define the DMA transfer step type */
#define SPRD_DMA_NONE_STEP 0
#define SPRD_DMA_BYTE_STEP 1
#define SPRD_DMA_SHORT_STEP 2
#define SPRD_DMA_WORD_STEP 4
#define SPRD_DMA_DWORD_STEP 8
#define SPRD_DMA_SOFTWARE_UID 0
/*
@ -598,16 +605,16 @@ static int sprd_dma_config(struct dma_chan *chan, struct sprd_dma_desc *sdesc,
if (IS_ALIGNED(len, 4)) {
datawidth = 2;
src_step = 4;
des_step = 4;
src_step = SPRD_DMA_WORD_STEP;
des_step = SPRD_DMA_WORD_STEP;
} else if (IS_ALIGNED(len, 2)) {
datawidth = 1;
src_step = 2;
des_step = 2;
src_step = SPRD_DMA_SHORT_STEP;
des_step = SPRD_DMA_SHORT_STEP;
} else {
datawidth = 0;
src_step = 1;
des_step = 1;
src_step = SPRD_DMA_BYTE_STEP;
des_step = SPRD_DMA_BYTE_STEP;
}
fragment_len = SPRD_DMA_MEMCPY_MIN_SIZE;