dma_async_device_channel_register
EXPORT_SYMBOL_GPL(dma_async_device_channel_register);
rc = dma_async_device_channel_register(dma, chan, NULL);
ret = dma_async_device_channel_register(&ddata->dma_dev, &chan->vchan.chan, name);
int dma_async_device_channel_register(struct dma_device *device,