Hi Andrew, On Thu, Jul 4, 2024 at 6:56 PM Andrew Davis <afd@xxxxxx> wrote: > The issue then is the overlay mechanism is not complete. We > can add properties to nodes, and add nodes to nodes, and append > properties to nodes, but cannot append values to existing properties, > only replace them completely. This gap in the overlay system will > prevent a general solution. So I've started to work on adding > that property appending ability to the overlay system. I should > have some patches posted against the upstream dtc/libfdt here > in the next week or so. This is not limited to overlays, but also true for plain dts. We have /delete-node/ and /delete-property/, but lack /append-property/. Hence we end up having to repeat all existing values when appending to a property (e.g. see [1] appending to clocks from [2]). [2] https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/renesas/r8a77951-salvator-xs.dts#L39 [1] https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/renesas/r8a77951.dtsi#L3334 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
