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Date: Thu, 11 Oct 2012 15:04:25 -0400 From: Matt Porter <mporter@...com> To: 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> Cc: 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: [RFC PATCH v2 00/16] DMA Engine support for AM33xx 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 AM33xx crossbar support to the private EDMA API (any EDMA events on the crossbar are not supported) - 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. The series applies on top of mainline from 12250d843e8489ee00b5b7726da855e51694e792 and the following patches: - Vaibhav's patch to fix AM33xx boot on mainline https://patchwork.kernel.org/patch/1569231/ - 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. 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 yet. This is tested on BeagleBone with a SPI framebuffer driver and SD card. It is regression tested 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 AM335x dmaengine: edma: enable build for AM33XX dmaengine: edma: Add TI EDMA device tree binding ARM: dts: add AM33XX EDMA support ARM: omap: add hsmmc am33xx specific init 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 | 49 + .../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/am33xx.dtsi | 100 ++ arch/arm/common/Kconfig | 3 + arch/arm/common/Makefile | 1 + arch/arm/common/edma.c | 1781 ++++++++++++++++++++ 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/mach-omap2/hsmmc.c | 7 +- 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 | 198 +++ 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, 2361 insertions(+), 1957 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-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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