diff options
| author | Vinod Koul <vinod.koul@intel.com> | 2014-10-11 21:16:44 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-10-15 21:31:27 +0530 |
| commit | 0a5642be03293f73706961a7649ac1d12bd0be59 (patch) | |
| tree | 158f2547dbcef8c5e4df0c290373ec4b106e3560 | |
| parent | b65612a868768cd0431084ccf376d0946c12132d (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.c | 16 | ||||
| -rw-r--r-- | include/linux/fsldma.h | 13 |
2 files changed, 28 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); diff --git a/include/linux/fsldma.h b/include/linux/fsldma.h new file mode 100644 index 000000000000..b213c02963c9 --- /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 |