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dmaengine: jz4780: Use dma_get_slave_channel when requesting a specific channel 

When the DT requests a specific channel to use it is not necesssary
to scan through all DMA channels in the system. Just return the
requested channel using dma_get_slave_channel().

Signed-off-by: Alex Smith <alex.smith@imgtec.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
hifive-unleashed-5.1
Alex Smith 2015-07-24 17:24:23 +01:00 committed by Vinod Koul
parent 839896ef3f
commit d3273e10ad
1 changed files with 7 additions and 2 deletions
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9
drivers/dma/dma-jz4780.c
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@ -726,9 +726,14 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec,
data.channel);
return NULL;
}
}
return dma_request_channel(mask, jz4780_dma_filter_fn, &data);
jzdma->chan[data.channel].transfer_type = data.transfer_type;
return dma_get_slave_channel(
&jzdma->chan[data.channel].vchan.chan);
} else {
return dma_request_channel(mask, jz4780_dma_filter_fn, &data);
}
}
static int jz4780_dma_probe(struct platform_device *pdev)