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-rw-r--r--drivers/dma/fsldma.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index d300de456c90..8670a5012122 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -221,13 +221,26 @@ static void dma_halt(struct fsldma_chan *chan)
u32 mode;
int i;
+ /* read the mode register */
mode = DMA_IN(chan, &chan->regs->mr, 32);
- mode |= FSL_DMA_MR_CA;
- DMA_OUT(chan, &chan->regs->mr, mode, 32);
- mode &= ~(FSL_DMA_MR_CS | FSL_DMA_MR_EMS_EN | FSL_DMA_MR_CA);
+ /*
+ * The 85xx controller supports channel abort, which will stop
+ * the current transfer. On 83xx, this bit is the transfer error
+ * mask bit, which should not be changed.
+ */
+ if ((chan->feature & FSL_DMA_IP_MASK) == FSL_DMA_IP_85XX) {
+ mode |= FSL_DMA_MR_CA;
+ DMA_OUT(chan, &chan->regs->mr, mode, 32);
+
+ mode &= ~FSL_DMA_MR_CA;
+ }
+
+ /* stop the DMA controller */
+ mode &= ~(FSL_DMA_MR_CS | FSL_DMA_MR_EMS_EN);
DMA_OUT(chan, &chan->regs->mr, mode, 32);
+ /* wait for the DMA controller to become idle */
for (i = 0; i < 100; i++) {
if (dma_is_idle(chan))
return;