dmaengine: sprd: Define the DMA transfer step type
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:
Родитель
60cc43fc88
Коммит
6b1d255ecd
|
@ -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;
|
||||
|
|
Загрузка…
Ссылка в новой задаче