Commit 87244fe5 authored by Laurent Pinchart's avatar Laurent Pinchart
Browse files

dmaengine: rcar-dmac: Add Renesas R-Car Gen2 DMA Controller (DMAC) driver 



The DMAC is a general purpose multi-channel DMA controller that supports
both slave and memcpy transfers.

The driver currently supports the DMAC found in the r8a7790 and r8a7791
SoCs. Support for compatible DMA controllers (such as the audio DMAC)
will be added later.

Feature-wise, automatic hardware handling of descriptors chains isn't
supported yet. LPAE support is implemented.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
parent c4d76352

drivers/dma/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -19,7 +19,7 @@ obj-$(CONFIG_AT_HDMAC) += at_hdmac.o 
obj-$(CONFIG_AT_XDMAC) += at_xdmac.o

obj-$(CONFIG_MX3_IPU) += ipu/

obj-$(CONFIG_TXX9_DMAC) += txx9dmac.o

obj-$(CONFIG_SH_DMAE_BASE) += sh/

obj-$(CONFIG_RENESAS_DMA) += sh/

obj-$(CONFIG_COH901318) += coh901318.o coh901318_lli.o

obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/

obj-$(CONFIG_IMX_SDMA) += imx-sdma.o

drivers/dma/sh/Kconfig

+13 −1
Original line number Diff line number Diff line
@@ -2,6 +2,10 @@ 
# DMA engine configuration for sh

#



config RENESAS_DMA

	bool

	select DMA_ENGINE



#

# DMA Engine Helpers

#
@@ -12,7 +16,7 @@ config SH_DMAE_BASE 
	depends on !SUPERH || SH_DMA

	depends on !SH_DMA_API

	default y

	select DMA_ENGINE

	select RENESAS_DMA

	help

	  Enable support for the Renesas SuperH DMA controllers.
@@ -52,3 +56,11 @@ config RCAR_AUDMAC_PP 
	depends on SH_DMAE_BASE

	help

	  Enable support for the Renesas R-Car Audio DMAC Peripheral Peripheral controllers.



config RCAR_DMAC

	tristate "Renesas R-Car Gen2 DMA Controller"

	depends on ARCH_SHMOBILE || COMPILE_TEST

	select RENESAS_DMA

	help

	  This driver supports the general purpose DMA controller found in the

	  Renesas R-Car second generation SoCs.

drivers/dma/sh/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -16,3 +16,4 @@ obj-$(CONFIG_SH_DMAE) += shdma.o 
obj-$(CONFIG_SUDMAC) += sudmac.o

obj-$(CONFIG_RCAR_HPB_DMAE) += rcar-hpbdma.o

obj-$(CONFIG_RCAR_AUDMAC_PP) += rcar-audmapp.o

obj-$(CONFIG_RCAR_DMAC) += rcar-dmac.o

drivers/dma/sh/rcar-dmac.c

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+1503 −0

File added.

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