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dmaengine: sun6i: Add driver for the Allwinner A31 DMA controller

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The Allwinner A31 has a 16 channels DMA controller that it shares with the
newer A23. Although sharing some similarities with the DMA controller of the
older Allwinner SoCs, it's significantly different, I don't expect it to be
possible to share the driver for these two.

The A31 Controller is able to memory-to-memory or memory-to-device transfers on
the 16 channels in parallel.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Maxime Ripard 2014-07-17 21:46:16 +02:00 committed by Vinod Koul
parent 3c677cc460
commit 5558593087
3 changed files with 1068 additions and 0 deletions
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8
drivers/dma/Kconfig
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@ -375,6 +375,14 @@ config XILINX_VDMA
channels, Memory Mapped to Stream (MM2S) and Stream to channels, Memory Mapped to Stream (MM2S) and Stream to
Memory Mapped (S2MM) for the data transfers. Memory Mapped (S2MM) for the data transfers.
config DMA_SUN6I
tristate "Allwinner A31 SoCs DMA support"
depends on MACH_SUN6I || COMPILE_TEST
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
Support for the DMA engine for Allwinner A31 SoCs.
config DMA_ENGINE config DMA_ENGINE
bool bool

1
drivers/dma/Makefile
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@ -47,3 +47,4 @@ obj-$(CONFIG_MOXART_DMA) += moxart-dma.o
obj-$(CONFIG_FSL_EDMA) += fsl-edma.o obj-$(CONFIG_FSL_EDMA) += fsl-edma.o
obj-$(CONFIG_QCOM_BAM_DMA) += qcom_bam_dma.o obj-$(CONFIG_QCOM_BAM_DMA) += qcom_bam_dma.o
obj-y += xilinx/ obj-y += xilinx/
obj-$(CONFIG_DMA_SUN6I) += sun6i-dma.o

1059
drivers/dma/sun6i-dma.c Normal file
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