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List:       dmaengine
Subject:    [PATCH v2 3/4] dmaengine: xilinx_dma: Introduce helper macro for preparing dma address
From:       Radhey Shyam Pandey <radhey.shyam.pandey () xilinx ! com>
Date:       2018-09-29 17:17:59
Message-ID: 1538241480-13844-4-git-send-email-radhey.shyam.pandey () xilinx ! com
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This patch introduces the xilinx_prep_dma_addr_t macro which prepares
dma_addr_t from hardware buffer descriptor LSB and MSB fields. It will
be used in simple dma 64-bit programming sequence.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
---
Changes for v2:
New patch- Preparatory change for 4/4 fix.
---
 drivers/dma/xilinx/xilinx_dma.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index a37871e..c27ab64 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -190,6 +190,8 @@
 /* AXI CDMA Specific Masks */
 #define XILINX_CDMA_CR_SGMODE          BIT(3)
 
+#define xilinx_prep_dma_addr_t(addr)	\
+	((dma_addr_t)((u64)addr##_##msb << 32 | (addr)))
 /**
  * struct xilinx_vdma_desc_hw - Hardware Descriptor
  * @next_desc: Next Descriptor Pointer @0x00
-- 
1.7.1

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