[linux-sunxi] [PATCH v7] DMA: sun6i: Add driver for the Allwinner A31 DMA controller
emilio at elopez.com.ar
Tue May 20 05:40:53 PDT 2014
El 24/04/14 11:22, Maxime Ripard escribió:
> 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 at free-electrons.com>
> Acked-by: Arnd Bergmann <arnd at arndb.de>
> diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
> index 5c5863842de9..360a10c71388 100644
> --- a/drivers/dma/Kconfig
> +++ b/drivers/dma/Kconfig
> @@ -361,6 +361,14 @@ config FSL_EDMA
> multiplexing capability for DMA request sources(slot).
> This module can be found on Freescale Vybrid and LS-1 SoCs.
> +config DMA_SUN6I
> + tristate "Allwinner A31 SoCs DMA support"
> + depends on ARCH_SUNXI
> + select DMA_ENGINE
> + select DMA_VIRTUAL_CHANNELS
I think you also need to select DMA_OF here as you are using
> + help
> + Support for the DMA engine for Allwinner A31 SoCs.
> config DMA_ENGINE
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