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

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>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 1eca7b9760e6..4b439270fb11 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -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