Hi all,
I apologise for sending out so many updates in quick succession before everyone
has had chance to review, however, I will be out of office next week and I know
that several people have been waiting for this. Normally, I would not send out
a series and disappear for a week, but Arnd agreed to help while I am out.
Arnd,
Feel free to make any changes you see fit while I am out or correct any balls-up
I have made!
Cheers
Jon
This is based upon the work by Benoit Cousson [1] and Nicolas Ferre [2] to add
some basic device-tree helpers to retrieve a DMA controller device_node and the
DMA request/channel information.
v6: - minor corrections in DMA binding documentation
v5: - minor update to binding documentation
- added loop to exhaustively search for a slave channel in the case where
there could be alternative channels available
v4: - revert the removal of xlate function from v3
- update the proposed binding format and APIs based upon discussions [3]
v3: - avoid passing an xlate function and instead pass DMA engine parameters
- define number of dma channels and requests in dma-controller node
v2: - remove of_dma_to_resource API
- make property #dma-cells required (no fallback anymore)
- another check in of_dma_xlate_onenumbercell() function
[1] http://article.gmane.org/gmane.linux.drivers.devicetree/12022
[2] http://article.gmane.org/gmane.linux.ports.arm.omap/73622
[3] http://marc.info/?l=linux-omap&m=133582085008539&w=2
Jon Hunter (2):
of: Add generic device tree DMA helpers
dmaengine: add helper function to request a slave DMA channel
Documentation/devicetree/bindings/dma/dma.txt | 81 +++++++++
drivers/dma/dmaengine.c | 16 ++
drivers/of/Makefile | 2 +-
drivers/of/dma.c | 219 +++++++++++++++++++++++++
include/linux/dmaengine.h | 6 +
include/linux/of_dma.h | 45 +++++
6 files changed, 368 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/dma/dma.txt
create mode 100644 drivers/of/dma.c
create mode 100644 include/linux/of_dma.h
--
1.7.9.5
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