[PATCH v2 3/4] dmaengine: xilinx_dma: Introduce helper macro for preparing dma address

From: Radhey Shyam Pandey
Date: Sat Sep 29 2018 - 13:18:34 EST


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@xxxxxxxxxx>
---
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