On Monday 02 June 2014 11:54:36 Santosh Shilimkar wrote: > > On Monday 02 June 2014 11:06 AM, Arnd Bergmann wrote: > > On Monday 02 June 2014 09:24:50 Santosh Shilimkar wrote: > >> On Monday 02 June 2014 02:37 AM, Shawn Guo wrote: > >>> On Thu, Apr 24, 2014 at 11:30:00AM -0400, Santosh Shilimkar wrote: > >>>> Here is an updated v3 of the series. Series introduces support for setting up > >>>> dma parameters based on device tree properties like 'dma-ranges' and > >>>> 'dma-coherent' and also update to ARM 32 bit port. Earlier version of the > >>>> series can be found here [3], [2] and [1]. > >>> > >>> Are these two generic device tree properties documented somewhere under > >>> Documentation/devicetree/bindings? > >>> > >> These bindings have been already in use before this series. But looks like > >> they have not been documented. I will do a patch to add description for those > >> couple of parameters. > > > > dma-ranges is part of ePAPR, and was documented in some ieee-1275 addenda > > before that, but I agree it would be nice to have something in kernel as > > well, at the minimum something pointing to the relevant documents. > > > We are thinking of updating 'Documentation/devicetree/bindings/dma/dma.txt' > to add the information for these extra two parameters. > > Is that fine or any other suggestion ? I think that's the wrong place. That entire directory currently deals with the specific case of DMA engines, as opposed to the more DMA bus mastering in general. We could rename that to Documentation/devicetree/bindings/dmaengine, but renames tend to cause extra patch conficts, so I'd prefer finding another location for this. How about a section in the top-level Documentation/devicetree/booting-without-of.txt file? After all, this is very generic and can impact any device that acts as a bus master. 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
