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dmaengine: Add helper function to convert direction value to text

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dmaengine_get_direction_text() can be useful when the direction is printed
out. The text is easier to comprehend than the number.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20191223110458.30766-7-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peter Ujfalusi 2019-12-23 13:04:46 +02:00 committed by Vinod Koul
parent 6755ec06d1
commit 816ebf4844
1 changed files with 19 additions and 0 deletions
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19
include/linux/dmaengine.h
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@ -1545,4 +1545,23 @@ static inline struct dma_chan
return __dma_request_channel(mask, fn, fn_param, NULL);
}
static inline char *
dmaengine_get_direction_text(enum dma_transfer_direction dir)
{
switch (dir) {
case DMA_DEV_TO_MEM:
return "DEV_TO_MEM";
case DMA_MEM_TO_DEV:
return "MEM_TO_DEV";
case DMA_MEM_TO_MEM:
return "MEM_TO_MEM";
case DMA_DEV_TO_DEV:
return "DEV_TO_DEV";
default:
break;
}
return "invalid";
}
#endif /* DMAENGINE_H */