dmaengine: pl330: add DMA_PAUSE feature

	return 0;

}

/*

 * We don't support DMA_RESUME command because of hardware

 * limitations, so after pausing the channel we cannot restore

 * it to active state. We have to terminate channel and setup

 * DMA transfer again. This pause feature was implemented to

 * allow safely read residue before channel termination.

 */

int pl330_pause(struct dma_chan *chan)

{

	struct dma_pl330_chan *pch = to_pchan(chan);

	struct pl330_dmac *pl330 = pch->dmac;

	unsigned long flags;

	pm_runtime_get_sync(pl330->ddma.dev);

	spin_lock_irqsave(&pch->lock, flags);

	spin_lock(&pl330->lock);

	_stop(pch->thread);

	spin_unlock(&pl330->lock);

	spin_unlock_irqrestore(&pch->lock, flags);

	pm_runtime_mark_last_busy(pl330->ddma.dev);

	pm_runtime_put_autosuspend(pl330->ddma.dev);

	return 0;

}

static void pl330_free_chan_resources(struct dma_chan *chan)

{

	struct dma_pl330_chan *pch = to_pchan(chan);

	pd->device_tx_status = pl330_tx_status;

	pd->device_prep_slave_sg = pl330_prep_slave_sg;

	pd->device_config = pl330_config;

	pd->device_pause = pl330_pause;

	pd->device_terminate_all = pl330_terminate_all;

	pd->device_issue_pending = pl330_issue_pending;

	pd->src_addr_widths = PL330_DMA_BUSWIDTHS;