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Message-ID: <CA+Bv8XZhrFR2krMS=psL96uaiVxnQ12s3ORN6F+yfXw40T1_uw@mail.gmail.com> Date: Fri, 26 Oct 2012 01:32:53 -0700 From: Russ Dill <russ.dill@...il.com> To: Matt Porter <mporter@...com> Cc: Tony Lindgren <tony@...mide.com>, Sekhar Nori <nsekhar@...com>, Grant Likely <grant.likely@...retlab.ca>, Mark Brown <broonie@...nsource.wolfsonmicro.com>, Benoit Cousson <b-cousson@...com>, Russell King <linux@....linux.org.uk>, Vinod Koul <vinod.koul@...el.com>, Rob Landley <rob@...dley.net>, Chris Ball <cjb@...top.org>, Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>, Linux OMAP List <linux-omap@...r.kernel.org>, Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>, Linux DaVinci Kernel List <davinci-linux-open-source@...ux.davincidsp.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Documentation List <linux-doc@...r.kernel.org>, Linux MMC List <linux-mmc@...r.kernel.org>, Linux SPI Devel List <spi-devel-general@...ts.sourceforge.net>, Arnd Bergmann <arnd@...db.de>, Dan Williams <djbw@...com>, Rob Herring <rob.herring@...xeda.com> Subject: Re: [RFC PATCH v3 00/16] DMA Engine support for AM33XX On Thu, Oct 18, 2012 at 6:26 AM, Matt Porter <mporter@...com> wrote: > Changes since v2: > - Rebased on 3.7-rc1 > - Fixed bug in DT/pdata parsing first found by Gururaja > that turned out to be masked by some toolchains > - Dropped unused mach-omap2/devices.c hsmmc patch > - Added AM33XX crossbar DMA event mux support > - Added am335x-evm support > > Changes since v1: > - Rebased on top of mainline from 12250d8 > - Dropped the feature removal schedule patch > - Implemented dma_request_slave_channel_compat() and > converted the mmc and spi drivers to use it > - Dropped unneeded #address-cells and #size-cells from > EDMA DT support > - Moved private EDMA header to linux/platform_data/ and > removed some unneeded definitions > - Fixed parsing of optional properties > > TODO: > - Add dmaengine support for per-channel caps so the > hack to set the maximum segments can be replaced with > a query to the dmaengine driver > > 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. This pretty far along and looks great. Reviewed-by: Russ.Dill@...com > The series applies on top of 3.7-rc1 and the following patches: > > - GPMC fails to reserve memory fix: > http://www.spinics.net/lists/linux-omap/msg79675.html > - TPS65910 regulator fix: > https://patchwork.kernel.org/patch/1593651/ > - dmaengine DT support from Vinod's dmaengine_dt branch in > git://git.infradead.org/users/vkoul/slave-dma.git since > 027478851791df751176398be02a3b1c5f6aa824 > > 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. > > With this series both BeagleBone and the AM335x EVM have working > MMC and SPI support. > > This is tested on BeagleBone with a SPI framebuffer driver and MMC > rootfs. A trivial gpio DMA event misc driver was used to test the > crossbar DMA event support. It is also tested on the AM335x EVM > with the onboard SPI flash and MMC rootfs. The branch at > https://github.com/ohporter/linux/tree/edma-dmaengine-v3 has the > complete series, dependencies, and some test drivers/defconfigs. > > Regression testing was done on AM180x-EVM (which also makes use > of the EDMA dmaengine driver and the EDMA private API) using SD, > SPI flash, and the onboard audio supported by the ASoC Davinci > driver. > > 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. > > Matt Porter (16): > dmaengine: edma: fix slave config dependency on direction > 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 AM33XX > ARM: edma: add AM33XX crossbar event support > dmaengine: edma: enable build for AM33XX > dmaengine: edma: Add TI EDMA device tree binding > ARM: dts: add AM33XX EDMA support > dmaengine: add dma_request_slave_channel_compat() > mmc: omap_hsmmc: convert to dma_request_slave_channel_compat() > mmc: omap_hsmmc: limit max_segs with the EDMA DMAC > mmc: omap_hsmmc: add generic DMA request support to the DT binding > ARM: dts: add AM33XX MMC support > spi: omap2-mcspi: convert to dma_request_slave_channel_compat() > spi: omap2-mcspi: add generic DMA request support to the DT binding > ARM: dts: add AM33XX SPI support > > Documentation/devicetree/bindings/dma/ti-edma.txt | 51 + > .../devicetree/bindings/mmc/ti-omap-hsmmc.txt | 25 +- > Documentation/devicetree/bindings/spi/omap-spi.txt | 27 +- > arch/arm/Kconfig | 1 + > arch/arm/boot/dts/am335x-bone.dts | 23 + > arch/arm/boot/dts/am335x-evm.dts | 15 + > arch/arm/boot/dts/am33xx.dtsi | 101 ++ > arch/arm/common/Kconfig | 3 + > arch/arm/common/Makefile | 1 + > arch/arm/common/edma.c | 1841 ++++++++++++++++++++ > arch/arm/mach-davinci/Makefile | 2 +- > arch/arm/mach-davinci/board-da830-evm.c | 4 +- > arch/arm/mach-davinci/board-da850-evm.c | 8 +- > arch/arm/mach-davinci/board-dm646x-evm.c | 4 +- > arch/arm/mach-davinci/board-omapl138-hawk.c | 8 +- > arch/arm/mach-davinci/board-tnetv107x-evm.c | 2 +- > arch/arm/mach-davinci/davinci.h | 2 +- > arch/arm/mach-davinci/devices-da8xx.c | 8 +- > arch/arm/mach-davinci/devices-tnetv107x.c | 6 +- > arch/arm/mach-davinci/devices.c | 7 +- > arch/arm/mach-davinci/dm355.c | 6 +- > arch/arm/mach-davinci/dm365.c | 6 +- > arch/arm/mach-davinci/dm644x.c | 6 +- > arch/arm/mach-davinci/dm646x.c | 6 +- > arch/arm/mach-davinci/dma.c | 1588 ----------------- > arch/arm/mach-davinci/include/mach/da8xx.h | 2 +- > arch/arm/mach-davinci/include/mach/edma.h | 267 --- > arch/arm/plat-omap/Kconfig | 1 + > drivers/dma/Kconfig | 2 +- > drivers/dma/edma.c | 57 +- > drivers/mmc/host/davinci_mmc.c | 1 + > drivers/mmc/host/omap_hsmmc.c | 20 +- > drivers/spi/spi-omap2-mcspi.c | 65 +- > include/linux/dmaengine.h | 10 + > include/linux/mfd/davinci_voicecodec.h | 3 +- > include/linux/platform_data/edma.h | 199 +++ > include/linux/platform_data/spi-davinci.h | 2 +- > sound/soc/davinci/davinci-evm.c | 1 + > sound/soc/davinci/davinci-pcm.c | 1 + > sound/soc/davinci/davinci-pcm.h | 2 +- > sound/soc/davinci/davinci-sffsdr.c | 6 +- > 41 files changed, 2436 insertions(+), 1954 deletions(-) > create mode 100644 Documentation/devicetree/bindings/dma/ti-edma.txt > create mode 100644 arch/arm/common/edma.c > delete mode 100644 arch/arm/mach-davinci/dma.c > delete mode 100644 arch/arm/mach-davinci/include/mach/edma.h > create mode 100644 include/linux/platform_data/edma.h > > -- > 1.7.9.5 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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