Hi,
On 02/24/2015 04:21 PM, Peter Ujfalusi wrote:
Hi,
The series adds support for DMA router type of devices. They are used in SoCs
which has more peripherals with DMA request lines than the DMA controller can
handle.
The router itself is not part of the DMA controller and it's operation should
be
transparent (as it is in the HW) for the SW stack.
This series takes into accound the comments Sricharan received for his version
of the crossbar driver:
https://lkml.org/lkml/2014/3/7/199
This implementation is not tied to any DMA driver so it is possible to use the
framework by other vendors, also ACPI version of binding can be easy enough to
be added.
The omap-dma part of changes are based on the dma property name change series:
https://lkml.org/lkml/2015/2/20/182
but the code has fallback so it is working w/o the changes in that series.
Gentle ping on this series before I send the V2 with the comments from Russell
and Paul addressed.
Kind Regards,
Péter
Regards,
Peter
---
Peter Ujfalusi (6):
dmaengine: of_dma: Support for DMA routers
dmaengine: Add driver for TI DMA crossbar on DRA7x
dmaengine: omap-dma: Use defines for dma channels and request count
dmaengine: omap-dma: Take DMA request number from DT if it is
available
dmaengine: omap-dma: Remove mapping between virtual channels and
requests
ARM: DTS: dra7x: Integrate sDMA crossbar
Documentation/devicetree/bindings/dma/dma.txt | 27
arch/arm/boot/dts/dra7.dtsi | 57
drivers/dma/Kconfig | 4 +
drivers/dma/Makefile | 1 +
drivers/dma/dmaengine.c | 7 +
drivers/dma/of-dma.c | 92 +
drivers/dma/omap-dma.c| 24 +++-
drivers/dma/ti-dma-crossbar.c | 191
++
include/linux/dmaengine.h | 17 +++
include/linux/of_dma.h| 21 +++
10 files changed, 413 insertions(+), 28 deletions(-)
create mode 100644 drivers/dma/ti-dma-crossbar.c
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