On Fri, Feb 21, 2014 at 11:27:29AM -0700, Warner Losh wrote: > > On Feb 20, 2014, at 4:38 AM, Grant Likely wrote: > > > On Wed, 19 Feb 2014 13:20:15 -0800, Olof Johansson <olof@xxxxxxxxx> wrote: > >> On Wed, Feb 19, 2014 at 1:12 PM, Rob Herring <robherring2@xxxxxxxxx> wrote: > >>> One way to minimize the inconvenience is keep versioning and dev > >>> cycles in sync with the kernel. We could also start doing things to > >>> align the kernel workflow with how things will work when we do have a > >>> separate repository. > >> > >> I don't think aligning development cycles is what we want most here it > >> might be useful for us in Linux but it'll make things difficult for > >> other projects since they're not aware of our release cycles. The > >> device tree bindings and DT contents in that repo should be "always > >> stable", i.e. no merge window / rc concept. As soon as something goes > >> in it's live, and from then out only fixes to the DTS files (or > >> appending the binding). > >> > >> For example, I don't want to have to track two trees to test against > >> -- I'll want to keep one repo of the very latest DT files and always > >> use those to boot any and all boards. > > > > This approach does have the subtle side effect that differs from what we > > discussed in Edinburgh. We've talked about always being able to boot a > > new kernel on an old devicetree, but not a new devicetree on an old > > kernel. With a separate board database repo we are going to hit both > > cases. At least to a limited extent we're going to need older kernels > > booting with the latest devicetree, and we'll need some rules about how > > that gets applied. > > I wasn't in Edinburgh... Was this at the binary level or at the > source level? I'm thinking specifically about the move to cpp in the > back of my mind... Only the binary compatibility matters. The source can change without breaking compatibility between kernels and devicetrees. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- 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
