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authorVinod Koul <vinod.koul@intel.com>2014-10-11 21:16:44 +0530
committerVinod Koul <vinod.koul@intel.com>2014-10-15 21:31:27 +0530
commit0a5642be03293f73706961a7649ac1d12bd0be59 (patch)
tree158f2547dbcef8c5e4df0c290373ec4b106e3560 /drivers/dma/fsldma.c
parentb65612a868768cd0431084ccf376d0946c12132d (diff)
downloadlinux-0a5642be03293f73706961a7649ac1d12bd0be59.tar.bz2
dmaengine: freescale: add and export fsl_dma_external_start()
The freescale driver uses custom device control FSLDMA_EXTERNAL_START to put the controller in external start mode. Since we are planning to deprecate the device control, move this to exported API. Subsequent patches will remove the FSLDMA_EXTERNAL_START Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/fsldma.c')
-rw-r--r--drivers/dma/fsldma.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index d5d6885ab341..0cded86f946c 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -36,7 +36,7 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
-
+#include <linux/fsldma.h>
#include "dmaengine.h"
#include "fsldma.h"
@@ -367,6 +367,20 @@ static void fsl_chan_toggle_ext_start(struct fsldma_chan *chan, int enable)
chan->feature &= ~FSL_DMA_CHAN_START_EXT;
}
+int fsl_dma_external_start(struct dma_chan *dchan, int enable)
+{
+ struct fsldma_chan *chan;
+
+ if (!dchan)
+ return -EINVAL;
+
+ chan = to_fsl_chan(dchan);
+
+ fsl_chan_toggle_ext_start(chan, enable);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fsl_dma_external_start);
+
static void append_ld_queue(struct fsldma_chan *chan, struct fsl_desc_sw *desc)
{
struct fsl_desc_sw *tail = to_fsl_desc(chan->ld_pending.prev);