On Fri, Oct 19, 2012 at 10:26:20AM +0000, Bedia, Vaibhav wrote: > Hi Matt, > > On Thu, Oct 18, 2012 at 18:56:39, Porter, Matt 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. > > > > 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. > > > > I didn't see all the patches that you posted on edma-dmaengine-v3 > but I do seem them on edma-dmaengine-am33xx-v3 branch.
I see I referenced the wrong branch in the cover letter. Thanks for testing and noticing this. Sorry to make you hunt for the correct branch in that repo. ;) https://github.com/ohporter/linux/tree/edma-dmaengine-am33xx-v3 is indeed the correct branch for those wanting to pull this in or grab some of the not-to-be-merged drivers I used for testing. > I added a couple of patches to enable earlyprintk and build the DTB > appended kernel image uImage-dtb.am335x-evm > > Here's what i see > > [...] <snip> > [ 0.175354] edma: probe of 49000000.edma failed with error -16 I missed an uninitialized pdata case in the bug fixes mentioned in the changelog and the folks previously failing the same way didn't hit the case I suspect you are hitting. Can you try this and let me know how it works? Thanks, Matt diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c index b761b7a..b43b327 100644 --- a/arch/arm/common/edma.c +++ b/arch/arm/common/edma.c @@ -1619,7 +1619,7 @@ static int __init edma_probe(struct platform_device *pdev) if (node) { pdata = devm_kzalloc(dev, - sizeof(struct edma_soc_info), + EDMA_MAX_CC*sizeof(struct edma_soc_info), GFP_KERNEL); edma_of_parse_dt(dev, node, pdata); info = &pdata; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
