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]> --- 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
