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dmaengine: Couple DMA channels to their physical DMA device 

Set the 'parent' field of channel class devices to point to the
physical DMA device initialized by the DMA engine driver.

This allows drivers to use chan->dev.parent for syncing DMA buffers
and adds a 'device' symlink to the real device in
/sys/class/dma/dmaXchanY.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Haavard Skinnemoen 2008-07-08 11:58:05 -07:00 committed by Dan Williams
parent 65bc3ffe8c
commit 1099dc7924
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/dmaengine.c
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@ -378,7 +378,7 @@ int dma_async_device_register(struct dma_device *device)
chan->chan_id = chancnt++; chan->chan_id = chancnt++;
chan->dev.class = &dma_devclass; chan->dev.class = &dma_devclass;
chan->dev.parent = NULL; chan->dev.parent = device->dev;
snprintf(chan->dev.bus_id, BUS_ID_SIZE, "dma%dchan%d", snprintf(chan->dev.bus_id, BUS_ID_SIZE, "dma%dchan%d",
device->dev_id, chan->chan_id); device->dev_id, chan->chan_id);