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authorRadhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>2018-09-29 11:17:59 -0600
committerVinod Koul <vkoul@kernel.org>2018-11-11 16:03:30 +0530
commit4e47d24a908c882b94c3f60cec56f02ac4e9bcea (patch)
tree8b39a4a9f1936623708fe96e40793d5fa8c7003b
parent91b438286ef227b5a9148156896175c8e386c6b2 (diff)
downloadlinux-4e47d24a908c882b94c3f60cec56f02ac4e9bcea.tar.bz2
dmaengine: xilinx_dma: Introduce helper macro for preparing dma address
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> Reviewed-by: Appana Durga Kedareswara Rao <appana.durga.rao@xilinx.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
-rw-r--r--drivers/dma/xilinx/xilinx_dma.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 06d1632ff1a2..153ca584eba5 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