Re: [linux-sunxi] [PATCH v7] DMA: sun6i: Add driver for the Allwinner A31 DMA controller

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Hi Maxime,

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@xxxxxxxxxxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
---
(snip)
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 of_dma_controller_register

+	help
+	  Support for the DMA engine for Allwinner A31 SoCs.
+
  config DMA_ENGINE
  	bool

Cheers,

Emilio

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