[PATCH 3/3] dmaengine: xilinx_dma: Fix 64-bit simple CDMA transfer

From: Radhey Shyam Pandey
Date: Fri Jul 27 2018 - 06:51:04 EST


In AXI CDMA simple mode also pass MSB bits of source and destination
address to xilinx_write function. This fixes simple CDMA operation
mode using 64-bit addressing.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
---
drivers/dma/xilinx/xilinx_dma.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index a37871e..2e15d86 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -1245,8 +1245,10 @@ static void xilinx_cdma_start_transfer(struct xilinx_dma_chan *chan)

hw = &segment->hw;

- xilinx_write(chan, XILINX_CDMA_REG_SRCADDR, hw->src_addr);
- xilinx_write(chan, XILINX_CDMA_REG_DSTADDR, hw->dest_addr);
+ xilinx_write(chan, XILINX_CDMA_REG_SRCADDR, (dma_addr_t)
+ ((u64)hw->src_addr_msb << 32 | hw->src_addr));
+ xilinx_write(chan, XILINX_CDMA_REG_DSTADDR, (dma_addr_t)
+ ((u64)hw->dest_addr_msb << 32 | hw->dest_addr));

/* Start the transfer */
dma_ctrl_write(chan, XILINX_DMA_REG_BTT,
--
1.7.1