On Mon, Sep 24, 2012 at 11:26:55AM +0000, Hebbar, Gururaja wrote: > On Fri, Sep 21, 2012 at 23:52:11, Porter, Matt wrote: > > On Fri, Sep 21, 2012 at 08:27:07AM +0000, Hebbar, Gururaja wrote: > > > On Thu, Sep 20, 2012 at 20:13:33, Porter, Matt wrote: > > > > This series adds DMA Engine support for AM33xx, which uses > > > > an EDMA DMAC. The EDMA DMAC has been previously supported by only > > > > a private API implementation (much like the situation with OMAP > > > > DMA) found on the DaVinci family of SoCs. > > > > > > > > There are a mind-boggling number of dependencies for this series: > > > > > > > > - Jon Hunter's OF DMA helpers series > > > > https://patchwork.kernel.org/patch/1461061/ > > > > https://patchwork.kernel.org/patch/1461051/ > > > > - Patch to address OF DMA helpers naming issues: > > > > https://patchwork.kernel.org/patch/1477921/ > > > > - EDMA DMA Engine wrapper driver in linux-next > > > > c2dde5f8f2095d7c623ff3565c1462e190272273 > > > > - EDMA DMA Engine wrapper driver bug fix: > > > > https://patchwork.kernel.org/patch/1474411/ > > > > - A huge number of patches in linux-next for AM33xx boot > > > > (too numerous to list) > > > > > > > > The approach taken is similar to how OMAP DMA is being converted to > > > > DMA Engine support. With the functional EDMA private API already > > > > existing in mach-davinci/dma.c, we first move that to an ARM common > > > > area so it can be shared. Adding DT and runtime PM support to the > > > > private EDMA API implementation allows it to run on AM33xx. AM33xx > > > > *only* boots using DT so we leverage Jon's generic DT DMA helpers to > > > > register EDMA DMAC with the of_dma framework and then add support > > > > for calling the dma_request_slave_channel() API to both the mmc > > > > and spi drivers. > > > > > > > > What works? Well, with this series we now have MMC and SPI support > > > > on AM33xx. The only caveat for MMC is that the mmc3 controller has > > > > its events on the crossbar and is not usable right now. > > > > > > > > This is tested on BeagleBone with a SPI framebuffer driver and SD > > > > card. > > > > > > > > After this series, the plan is to convert the last in-tree user > > > > of the private EDMA API (davinci-pcm/mcasp) and then eliminate > > > > the private EDMA API by folding its functionality into > > > > drivers/dma/edma.c. > > > > > > > > TODO: > > > > add AM33xx crossbar support to the private EDMA API > > > > (any EDMA events on the crossbar are not supported) > > > > > > > > > > > > > Can you please mention the base repo you have taken as starting point. > > > (repo + extra patches ...). > > > > It's mainline 3.6-rc6 and you can see the complete set of patches > > at https://github.com/ohporter/linux/tree/edma-dmaengine-am33xx-rfc-v1 > > after commit 5698bd757d55b1bb87edd1a9744ab09c142abfc2
> > Thanks for the link. However, I was looking for the mainline kernel > repo/branch > That you first used as baseline. Linus 3.6-rc6 is the baseline. This inital version was created before any of the am33xx base support patches got pulled to linux-next. v2 is being rebased against that to slim down the stack of patches necessary for testing. > > > This will help us to test the code. > > > > > > This is because I looked at the patch 12/13 and I see that mmc > > > device-node is modified. But in mainline I don’t see device > > > node for mmc (yet). > > > > Oops. You'll need e62a3333ae450bcdefbe22229d7bc277ae0ef645 and > > fe97304557d2c6f7d0aaf1ea028ea48ffca366a9 which I forgot to include > > in this series. I'll have them in for v2. > > > > -Matt > > > > > > Matt Porter (13): > > > > ARM: davinci: move private EDMA API to arm/common > > > > ARM: edma: remove unused transfer controller handlers > > > > ARM: edma: add DT and runtime PM support for AM335x > > > > dmaengine: edma: enable build for AM335x > > > > dma: Add TI EDMA device tree binding > > > > ARM: omap: add hsmmc am33xx specific init > > > > mmc: omap_hsmmc: dma_request_slave_channel() support for DT platforms > > > > mmc: omap_hsmmc: limit max_segs with the EDMA DMAC > > > > mmc: omap_hsmmc: add generic DMA request support to the DT binding > > > > spi: omap2-mcspi: dma_request_slave_channel() support for DT > > > > platforms > > > > spi: omap2-mcspi: add generic DMA request support to the DT binding > > > > ARM: dts: add am33xx EDMA support > > > > Documentation: add schedule for removing private EDMA API > > > > > > > > Documentation/devicetree/bindings/dma/ti-edma.txt | 49 + > > > > .../devicetree/bindings/mmc/ti-omap-hsmmc.txt | 25 +- > > > > Documentation/devicetree/bindings/spi/omap-spi.txt | 27 +- > > > > Documentation/feature-removal-schedule.txt | 10 + > > > > arch/arm/Kconfig | 1 + > > > > arch/arm/boot/dts/am33xx.dtsi | 46 + > > > > arch/arm/common/Kconfig | 3 + > > > > arch/arm/common/Makefile | 1 + > > > > arch/arm/common/edma.c | 1779 > > > > ++++++++++++++++++++ > > > > arch/arm/include/asm/mach/edma.h | 267 +++ > > > > arch/arm/mach-davinci/Makefile | 2 +- > > > > arch/arm/mach-davinci/devices.c | 3 +- > > > > arch/arm/mach-davinci/dm355.c | 2 +- > > > > arch/arm/mach-davinci/dm365.c | 2 +- > > > > arch/arm/mach-davinci/dm644x.c | 2 +- > > > > arch/arm/mach-davinci/dm646x.c | 2 +- > > > > arch/arm/mach-davinci/dma.c | 1588 > > > > ----------------- > > > > arch/arm/mach-davinci/include/mach/asp.h | 2 +- > > > > arch/arm/mach-davinci/include/mach/da8xx.h | 3 +- > > > > arch/arm/mach-davinci/include/mach/edma.h | 267 --- > > > > arch/arm/mach-davinci/include/mach/spi.h | 2 +- > > > > arch/arm/mach-omap2/hsmmc.c | 7 +- > > > > arch/arm/plat-omap/Kconfig | 1 + > > > > drivers/dma/Kconfig | 2 +- > > > > drivers/dma/edma.c | 2 +- > > > > drivers/mmc/host/omap_hsmmc.c | 26 +- > > > > drivers/spi/spi-omap2-mcspi.c | 68 +- > > > > 27 files changed, 2296 insertions(+), 1893 deletions(-) > > > > create mode 100644 Documentation/devicetree/bindings/dma/ti-edma.txt > > > > create mode 100644 arch/arm/common/edma.c > > > > create mode 100644 arch/arm/include/asm/mach/edma.h > > > > delete mode 100644 arch/arm/mach-davinci/dma.c > > > > delete mode 100644 arch/arm/mach-davinci/include/mach/edma.h > > > > > > > > -- > > > > 1.7.9.5 > > > > > > > > _______________________________________________ > > > > Davinci-linux-open-source mailing list > > > > davinci-linux-open-sou...@linux.davincidsp.com > > > > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > > > > > > > > > > > > > Regards, > > > Gururaja > > > _______________________________________________ > > > Davinci-linux-open-source mailing list > > > davinci-linux-open-sou...@linux.davincidsp.com > > > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > > > > > Regards, > Gururaja > _______________________________________________ > Davinci-linux-open-source mailing list > davinci-linux-open-sou...@linux.davincidsp.com > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ spi-devel-general mailing list spi-devel-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/spi-devel-general
