From 6b1d255ecde522ac961226b22321f417c62b2435 Mon Sep 17 00:00:00 2001 From: Eric Long Date: Thu, 19 Apr 2018 10:00:46 +0800 Subject: dmaengine: sprd: Define the DMA transfer step type Define the DMA transfer step type to make code more readable. Signed-off-by: Eric Long Signed-off-by: Baolin Wang Signed-off-by: Vinod Koul --- drivers/dma/sprd-dma.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'drivers/dma/sprd-dma.c') diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index b106e8a60af6..dcfa4179bf9e 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -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; -- cgit v1.2.3