Recently shdma acquired DT support with a possibility to place multiple
compatible DMAC instances under a common DMA multiplexer DT node. This is
used to provide DMA support on r8a7740 / armadillo800eva. However there
are also SoCs with a single DMAC instance. We could still put it under a
(dummy) multiplexer DT node, or we can add support for such configurations
to the shdma driver and simplify DTs on such SoCs. Patch 1 in this
series adds support for such top-level DMAC DT nodes to shdma, which is
then used on sh73a0. This is why patches 1-3 are marked "RFC," if it is
preferred to not add this complexity to the driver and use a dummy DMA
multiplexer instead, patch 1 shall be dropped and patches 2 and 3 would
have to be reworked.
Cc: Guennadi Liakhovetski <g.liakhovetski+rene...@gmail.com>
Cc: Vinod Koul <vinod.k...@intel.com>
Guennadi Liakhovetski (7):
DMA: shdma: also support single top-level DMAC DT nodes
ARM: shmobile: sh73a0: add support for the DMA0 controller in DT
ARM: shmobile: kzm9g-reference: add DMA channels to the MMCIF DT
ARM: shmobile: r8a7740: add MMCIF DMA definitions
ARM: shmobile: r8a7740: add DT nodes for three DMAC instance
ARM: shmobile: add SDHI and MMCIF interfaces to
armadillo800eva-reference
ARM: shmobile: armadillo800eva-reference: add DMA support for MMCIF
and SDHI
.../boot/dts/r8a7740-armadillo800eva-reference.dts | 30 ++++++-
arch/arm/boot/dts/r8a7740.dtsi | 95 ++++++++++++++++++++
arch/arm/boot/dts/sh73a0-kzm9g-reference.dts | 3 +
arch/arm/boot/dts/sh73a0.dtsi | 36 ++++++++
.../board-armadillo800eva-reference.c | 36 +++++++-
arch/arm/mach-shmobile/include/mach/r8a7740.h | 2 +
arch/arm/mach-shmobile/setup-r8a7740.c | 22 +++++
arch/arm/mach-shmobile/setup-sh73a0.c | 4 +
drivers/dma/sh/shdma-of.c | 5 +-
drivers/dma/sh/shdma.c | 16 ++++
include/linux/sh_dma.h | 5 +
11 files changed, 250 insertions(+), 4 deletions(-)
--
1.7.2.5
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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