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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2013-01-10 10:52:56 +0200
committerVinod Koul <vinod.koul@intel.com>2013-01-12 05:07:21 -0800
commit61cc13a51bcff737ce02d2047834171c0365b00d (patch)
treefc7c2d9708d63f82259c6b6bc1df0650050d01c2 /include/linux/dmaengine.h
parent21fe3c5245647d200a7ba25d42b80d21c578a8dc (diff)
downloadlinux-next-61cc13a51bcff737ce02d2047834171c0365b00d.tar.gz
dmaengine: introduce is_slave_direction function
This function helps to distinguish the slave type of transfer by checking the direction parameter. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'include/linux/dmaengine.h')
-rw-r--r--include/linux/dmaengine.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 4ca9cf73ad3f..bfcdecb5d87a 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -621,6 +621,11 @@ static inline int dmaengine_slave_config(struct dma_chan *chan,
(unsigned long)config);
}
+static inline bool is_slave_direction(enum dma_transfer_direction direction)
+{
+ return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM);
+}
+
static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
struct dma_chan *chan, dma_addr_t buf, size_t len,
enum dma_transfer_direction dir, unsigned long flags)