From: Muhammad Hamza Farooq <mfarooq@xxxxxxxxxxx> Signed-off-by: Muhammad Hamza Farooq <mfarooq@xxxxxxxxxxx> --- drivers/dma/sh/rcar-dmac.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index b5b5e89..c3753e1 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -774,6 +774,26 @@ static void rcar_dmac_chan_reinit(struct rcar_dmac_chan *chan) } } +static int rcar_dmac_chan_pause(struct dma_chan *chan) +{ + u32 chcr; + int ret; + unsigned long flags; + struct rcar_dmac_chan *rchan = to_rcar_dmac_chan(chan); + + spin_lock_irqsave(&rchan->lock, flags); + + chcr = rcar_dmac_chan_read(rchan, RCAR_DMACHCR); + chcr &= ~RCAR_DMACHCR_DE; + rcar_dmac_chan_write(rchan, RCAR_DMACHCR, chcr); + ret = rcar_dmac_wait_stop(rchan); + + spin_unlock_irqrestore(&rchan->lock, flags); + + WARN_ON(ret < 0); + return ret; +} + static void rcar_dmac_stop(struct rcar_dmac *dmac) { rcar_dmac_write(dmac, RCAR_DMAOR, 0); @@ -1740,6 +1760,7 @@ static int rcar_dmac_probe(struct platform_device *pdev) engine->device_prep_slave_sg = rcar_dmac_prep_slave_sg; engine->device_prep_dma_cyclic = rcar_dmac_prep_dma_cyclic; engine->device_config = rcar_dmac_device_config; + engine->device_pause = rcar_dmac_chan_pause; engine->device_terminate_all = rcar_dmac_chan_terminate_all; engine->device_tx_status = rcar_dmac_tx_status; engine->device_issue_pending = rcar_dmac_issue_pending; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html