On Fri, May 1, 2015 at 10:22 AM, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote: > On Fri, 2015-05-01 at 07:54 -0500, Rob Herring wrote: > >> The difference seems to be whether you allocate space or just point to >> the FDT for various strings/data. Is that right? >> >> > * of_fdt_add_subtree() is the introduced API to do the work. >> >> Have you looked at overlays and if so why do they not work for your purposes? >> >> Why do you need to do this with the flattened tree? > > The basic idea I asked Gavin to implement is that since the FW needs to > provide a bunch of DT updates to Linux at runtime in the form of new > nodes below an existing one, rather than doing it via some new/custom > format, instead, have it send a bit of FDT blob to expand under an > existing node. Overlay = an FDT blob to graft into a live running system. Sounds like the same thing. > As for the details of Gavin implementation, I haven't looked at it in > details yet so there might be issues there, however I don't know what > you mean by "overlays", any pointer ? CONFIG_OF_OVERLAY http://events.linuxfoundation.org/sites/events/files/slides/dynamic-dt-keynote-v3.pdf Rob -- 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
