[PATCH v8 06/18] dmaengine: Add helper function to convert direction value to text

Peter Ujfalusi
2019-12-23T11:06:26Z

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>
---
include/linux/dmaengine.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 7f9a7150a632..9852ba7399db 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1537,4 +1537,23 @@ 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 */