This patch adds a new function rcar_dmac_clear_chcr_de() to simplify
adding pause function later.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
drivers/dma/sh/rcar-dmac.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index 9906a9c..d3b7388 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -759,18 +759,25 @@ static void rcar_dmac_chcr_de_barrier(struct rcar_dmac_chan *chan)
dev_err(chan->chan.device->dev, "CHCR DE check error\n");
}
-static void rcar_dmac_sync_tcr(struct rcar_dmac_chan *chan)
+static void rcar_dmac_clear_chcr_de(struct rcar_dmac_chan *chan)
{
u32 chcr = rcar_dmac_chan_read(chan, RCAR_DMACHCR);
- if (!(chcr & RCAR_DMACHCR_DE))
- return;
-
/* set DE=0 and flush remaining data */
rcar_dmac_chan_write(chan, RCAR_DMACHCR, (chcr & ~RCAR_DMACHCR_DE));
/* make sure all remaining data was flushed */
rcar_dmac_chcr_de_barrier(chan);
+}
+
+static void rcar_dmac_sync_tcr(struct rcar_dmac_chan *chan)
+{
+ u32 chcr = rcar_dmac_chan_read(chan, RCAR_DMACHCR);
+
+ if (!(chcr & RCAR_DMACHCR_DE))
+ return;
+
+ rcar_dmac_clear_chcr_de(chan);
/* back DE if remain data exists */
if (rcar_dmac_chan_read(chan, RCAR_DMATCR))
--
1.9.1
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