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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
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
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-$(CONFIG_QCOM_BAM_DMA) += qcom_bam_dma.o
obj-y += xilinx/
obj-$(CONFIG_DMA_SUN6I) += sun6i-dma.o

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