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dmaengine: sun4i: Add support for the DMA engine on sun[457]i SoCs

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This patch adds support for the DMA engine present on Allwinner A10,
A13, A10S and A20 SoCs. This engine has two kinds of channels: normal
and dedicated. The main difference is in the mode of operation;
while a single normal channel may be operating at any given time,
dedicated channels may operate simultaneously provided there is no
overlap of source or destination.

Hardware documentation can be found on A10 User Manual (section 12), A13
User Manual (section 14) and A20 User Manual (section 1.12)

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Emilio López
2015-07-26 22:50:55 +02:00
committed by Vinod Koul
parent 777572911a
commit b096c1377d
4 changed files with 1346 additions and 0 deletions
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11
drivers/dma/Kconfig
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@@ -434,6 +434,17 @@ config XILINX_VDMA
channels, Memory Mapped to Stream (MM2S) and Stream to
Memory Mapped (S2MM) for the data transfers.
config DMA_SUN4I
tristate "Allwinner A10 DMA SoCs support"
depends on MACH_SUN4I || MACH_SUN5I || MACH_SUN7I || COMPILE_TEST
default (MACH_SUN4I || MACH_SUN5I || MACH_SUN7I)
select DMA_ENGINE
select DMA_OF
select DMA_VIRTUAL_CHANNELS
help
Enable support for the DMA controller present in the sun4i,
sun5i and sun7i Allwinner ARM SoCs.
config DMA_SUN6I
tristate "Allwinner A31 SoCs DMA support"
depends on MACH_SUN6I || MACH_SUN8I || COMPILE_TEST