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authorVinod Koul <vinod.koul@intel.com>2014-10-11 15:46:44 (GMT)
committerVinod Koul <vinod.koul@intel.com>2014-10-15 16:01:27 (GMT)
commit0a5642be03293f73706961a7649ac1d12bd0be59 (patch)
tree158f2547dbcef8c5e4df0c290373ec4b106e3560
parentb65612a868768cd0431084ccf376d0946c12132d (diff)
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>
-rw-r--r--drivers/dma/fsldma.c16
-rw-r--r--include/linux/fsldma.h13
2 files changed, 28 insertions, 1 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index d5d6885..0cded86 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);
diff --git a/include/linux/fsldma.h b/include/linux/fsldma.h
new file mode 100644
index 0000000..b213c02
--- /dev/null
+++ b/include/linux/fsldma.h
@@ -0,0 +1,13 @@
+/*
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef FSL_DMA_H
+#define FSL_DMA_H
+/* fsl dma API for enxternal start */
+int fsl_dma_external_start(struct dma_chan *dchan, int enable);
+
+#endif

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