On Wednesday 07 August 2013, Daniel Mack wrote: > I've been working on teaching the mmp-pdma driver more functions and > porting tree-wide scattered pxa specific drivers over to dmaengine > implementations. I posted the first round of patches for mmp-pdma here: > > http://marc.info/?l=linux-arm-kernel&m=137587082530228 > > > With the following patches applied, I can boot a PXA3xx board boot with > all DMA runtime information determined from DT, using pxa3xx-nand, > pxamci and audio components (cyclic DMA). > > However, the transition is quite intrusive and spans across several > subsystem, and due to the nature of the current pxa DMA implementation, > it cannot be gap-less. All drivers currently request an exclusive > channel via code in arch/arm/plat-pxa/dma.c and then do direct register > modifications regarding their obtained channel. We can't allow this > with the mmp-pdma driver of course, and I also have no idea how to > provide sane stubs for the existing hooks which end up in dmaengine > calls. > > Hence, all drivers have to be ported over in one series, and all these > changes should be merged by one pull request eventually in order to > prevent both build and functional breakage. Haojian's repository seems > most suitable for that, as he's the PXA maintainer. Very nice series! I just looked over these and only found a few minor details that could be improved. Arnd -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
