Zhangfei Gao
7bb587f4ee
dmaengine: add interface of dma_get_slave_channel
Suggested by Arnd, add dma_get_slave_channel interface
Dma host driver could get specific channel specificied by request line, rather than filter.
host example:
static struct dma_chan *xx_of_dma_simple_xlate(struct of_phandle_args *dma_spec,
struct of_dma *ofdma)
{
struct xx_dma_dev *d = ofdma->of_dma_data;
unsigned int request = dma_spec->args[0];
if (request > d->dma_requests)
return NULL;
return dma_get_slave_channel(&(d->chans[request].vc.chan));
}
probe:
of_dma_controller_register((&op->dev)->of_node, xx_of_dma_simple_xlate, d);
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-08-13 16:32:59 +05:30
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