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dmaengine: Add helper function to convert direction value to text
author
Peter Ujfalusi
<peter.ujfalusi@ti.com>
Mon, 23 Dec 2019 11:04:46 +0000
(13:04 +0200)
committer
Vinod Koul
<vkoul@kernel.org>
Tue, 21 Jan 2020 05:36:12 +0000
(11:06 +0530)
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>
include/linux/dmaengine.h
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diff --git
a/include/linux/dmaengine.h
b/include/linux/dmaengine.h
index
b44b9c6
..
62225d4
100644
(file)
--- a/
include/linux/dmaengine.h
+++ b/
include/linux/dmaengine.h
@@
-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 */