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dmaengine: xilinx_dma: Introduce helper macro for preparing dma address

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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 <[email protected]>
Reviewed-by: Appana Durga Kedareswara Rao <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Radhey Shyam Pandey 2018-09-29 11:17:59 -06:00 • committed by Vinod Koul
commit 4e47d24a90
1 changed files with 2 additions and 0 deletions
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2
drivers/dma/xilinx/xilinx_dma.c
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@ -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