From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomeu Vizoso Subject: Re: [PATCH v3 01/18] platform: delay OF device-driver matches until late_initcall Date: Fri, 7 Aug 2015 09:11:23 +0200 Message-ID: References: <1438870315-18689-1-git-send-email-tomeu.vizoso@collabora.com> <1438870315-18689-2-git-send-email-tomeu.vizoso@collabora.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Rob Herring Cc: "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Rob Herring , Stephen Warren , Javier Martinez Canillas , Mark Brown , Thierry Reding , "Rafael J. Wysocki" , "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" , Dmitry Torokhov , "devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Linus Walleij , "linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Arnd Bergmann List-Id: devicetree@vger.kernel.org On 6 August 2015 at 22:19, Rob Herring wrote: > On Thu, Aug 6, 2015 at 9:11 AM, Tomeu Vizoso wrote: >> Delay matches of platform devices with OF nodes until late_initcall, >> when we are sure that all built-in drivers have been registered already. >> This is needed to prevent deferred probes because of some drivers not >> having registered yet. >> >> The reason why only platform devices are delayed is that some other >> devices are expected to be probed earlier than late_initcall, for >> example, the system PNP driver needs to probe its devices in >> fs_initcall. >> >> Additionally, only platform devices with OF nodes are delayed because >> some machines may depend on oter platform devices being registered at >> specific times. > > How do we know that these probes occur before the unused clocks and > regulators are turned off? Just getting lucky (as is deferred probe)? > Can we do this one level earlier so we have a level left to do things > after probe. Those are already late_initcall_sync so I guess we're fine. Thanks, Tomeu > Rob > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html