Commit 6b1d255e authored by Eric Long's avatar Eric Long Committed by Vinod Koul
Browse files

dmaengine: sprd: Define the DMA transfer step type 



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

Signed-off-by: default avatarEric Long <eric.long@spreadtrum.com>
Signed-off-by: default avatarBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 60cc43fc

drivers/dma/sprd-dma.c

+13 −6
Original line number Diff line number Diff line
@@ -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;