On Thursday 31 January 2013, Matt Porter wrote: > On Wed, Jan 30, 2013 at 09:32:58AM +0000, Arnd Bergmann wrote: > > On Wednesday 30 January 2013, Matt Porter wrote: > > > + dma_cap_set(DMA_SLAVE, edma_filter_info.dma_cap); > > > + of_dma_controller_register(dev->of_node, > > > + of_dma_simple_xlate, > > > + &edma_filter_info); > > > + } > > > > How do you actually deal with the problem mentioned by Padma, that > > the filter function does not know which edma instance it is looking > > at? If you assume that there can only be a single edma instance in > > the system, that is probably a limitation that should be documented > > somewhere, and ideally the probe() function should check for that. > > I make an assumption of one edma instance in the system in the case of > DT being populated. This is always true right now as the only SoC with > two EDMA controllers in existence is Davinci DA850. Until recently, > Davinci had no DT support. Given the steady work being done today on DT > support for DA850, it'll probably be something needed in 3.10. > > I will add a comment and check in probe() to capture this assumption > and then plan to update separately to support DA850 booting from DT. Ok, sounds good. Hopefully by then we will already have a nicer way to write an xlate function that does not rely on a filter function. Arnd -- 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
