From d088c33b646e9f3564eea7a057a2cb697c18bcd0 Mon Sep 17 00:00:00 2001 From: Elen Song Date: Fri, 10 May 2013 11:00:50 +0800 Subject: DMA: AT91: Get transfer width In one dma transfer, the data transfer width can be configured and it is limited by source or destination peripheral width, tx_width will save the transfer width, but for memcpy, either source or destination transfer width is taken as tx_width. Signed-off-by: Elen Song Signed-off-by: Vinod Koul --- drivers/dma/at_hdmac.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/dma/at_hdmac.c') diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 9e1ad73a78cf..4c101a9dd3cb 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -615,6 +615,7 @@ atc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, /* First descriptor of the chain embedds additional information */ first->txd.cookie = -EBUSY; first->len = len; + first->tx_width = src_width; /* set end-of-link to the last link descriptor of list*/ set_desc_eol(desc); @@ -761,6 +762,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, /* First descriptor of the chain embedds additional information */ first->txd.cookie = -EBUSY; first->len = total_len; + first->tx_width = reg_width; /* first link descriptor of list is responsible of flags */ first->txd.flags = flags; /* client is in control of this ack */ @@ -919,6 +921,7 @@ atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, /* First descriptor of the chain embedds additional information */ first->txd.cookie = -EBUSY; first->len = buf_len; + first->tx_width = reg_width; return &first->txd; -- cgit 1.4.1