E.g. arch/arm64/boot/dts/renesas/r8a77951-salvator-xs.dts has compatible = "renesas,salvator-xs", "renesas,r8a7795". While we could add e.g. "renesas,salvator-xs-r8a7791", doing so would inflate the bindings a lot. > Again - you intend to use a pair or even a triple of compatibles to > uniquely identify type of hardware. I don't think it is correct - the > final, most specific compatible, uniquely identifies the hardware. All > other compatibles are just for fallback. And what to do when adding more DT overlays for expansion boards? This would become unmanageable soon. 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