diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/mmp_pdma.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c index b1a260002cf8..9a32f2d174b0 100644 --- a/drivers/dma/mmp_pdma.c +++ b/drivers/dma/mmp_pdma.c @@ -252,10 +252,16 @@ static void mmp_pdma_free_phy(struct mmp_pdma_chan *pchan) { struct mmp_pdma_device *pdev = to_mmp_pdma_dev(pchan->chan.device); unsigned long flags; + u32 reg; if (!pchan->phy) return; + /* clear the channel mapping in DRCMR */ + reg = pchan->phy->vchan->drcmr; + reg = ((reg < 64) ? 0x0100 : 0x1100) + ((reg & 0x3f) << 2); + writel(0, pchan->phy->base + reg); + spin_lock_irqsave(&pdev->phy_lock, flags); pchan->phy->vchan = NULL; pchan->phy = NULL; |