This patch fixes at_xdmac_prep_dma_memcpy(). Indeed the data width field
of the Channel Configuration register was not updated properly in the
loop: the bits of the dwidth field were not cleared before adding their
new value.
Signed-off-by: Cyrille Pitchen <cyrille.pitc...@atmel.com>
---
drivers/dma/at_xdmac.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index 90040e99f5f3..39f59666f93f 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1096,6 +1096,7 @@ at_xdmac_prep_dma_memcpy(struct dma_chan *chan,
dma_addr_t dest, dma_addr_t src,
/* Check remaining length and change data width if needed. */
dwidth = at_xdmac_align_width(chan,
src_addr | dst_addr | xfer_size);
+ chan_cc &= ~AT_XDMAC_CC_DWIDTH_MASK;
chan_cc |= AT_XDMAC_CC_DWIDTH(dwidth);
ublen = xfer_size >> dwidth;
--
1.8.2.2
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