On Thu, Oct 18, 2012 at 18:56:39, Porter, Matt wrote: ...snip... ...snip... ...snip... > > 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 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. Since you have tested MMC, and probably will be adding Audio support for AM335x as well, I believe you will also be adding Pin-mux support for both the modules. Can you share your plan to release the next version? I have few patches pending for AM335x Audio (DT related). Thanks in advance Regards Gururaja > > 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
