On Mon, 2013-12-09 at 11:21 +0100, Daniel Mack wrote: > On 12/09/2013 10:34 AM, Sergei Ianovich wrote: > > On Mon, 2013-12-09 at 10:04 +0100, Daniel Mack wrote: > >> On 12/09/2013 02:33 AM, Arnd Bergmann wrote: > >>> It hasn't made it upstream yet, but see http://list-archives.org/2013/08/07/linux-mtd-lists-infradead-org/patch-00-20-arm-pxa-move-core-and-drivers-to-dmaengine/f/3444199144 > >>> for how it's done. Maybe Daniel can comment on the status of his > >>> patches. > >> ... > The only real problem is the PXA camera driver, which does tricky things > like hot re-queuing of DMA descriptors. That one needs fixing before the > series can land. My impression is that his series is hard to land. I've expressed my concerns about big changes in a separate mail. PXA device tree support issue is practically orthogonal. As of August 2013, Daniel's dma series doesn't add any dt support. After new DMA is working, we will need to add dt support in the same drivers. Basically we have three options: A. Wait for Daniel DMA, than for PXA clock, than do dt support pros: * correct order cons: * need to wait, possibly a long time * dt boot not possible, while we wait B. Provide 'hackish' support to dt, than correct hacks when DMA is merged. pros: * parallel development * healthier kernel code (current PXA usb driver won't compile with dt enabled) cons: * wrong concept (like my patch 5/9) until DMA is working * need to recompile dtb files when kernel changes C. Use 'fake' DMA provider dt binding to emulate existing DMA until new DMA is merged, than pros: * parallel development * healthier kernel code * correct device trees from the beginning cons: * more work * still need to recompile dtbs when clock support is merged Any ideas? -- 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
