On Mon, Sep 21, 2015 at 4:02 PM, Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx> wrote: > Walks the OF tree up and finds the closest ancestor that has a struct > device associated with it, probing it if isn't bound to a driver yet. > > The above should ensure that the dependency represented by the passed OF > node is available, because probing a device should cause its descendants > to be probed as well (when they get registered). > > Subsystems can use this when looking up resources for drivers, to reduce > the chances of deferred probes because of the probing order of devices. > > Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx> Don't know to which response I should post this comment, so I'm responding to the original email. Some subsystems already do this. If you call e.g. syscon_regmap_lookup_by_phandle(), it will call of_syscon_register() if the syscon device pointed to hasn't been registered yet. 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 -- 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