Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755290AbbHGHLr (ORCPT ); Fri, 7 Aug 2015 03:11:47 -0400 Received: from mail-wi0-f182.google.com ([209.85.212.182]:34641 "EHLO mail-wi0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752585AbbHGHLo (ORCPT ); Fri, 7 Aug 2015 03:11:44 -0400 MIME-Version: 1.0 In-Reply-To: References: <1438870315-18689-1-git-send-email-tomeu.vizoso@collabora.com> <1438870315-18689-2-git-send-email-tomeu.vizoso@collabora.com> From: Tomeu Vizoso Date: Fri, 7 Aug 2015 09:11:23 +0200 X-Google-Sender-Auth: WZgmDm_dFtA_771nbkJioovhQug Message-ID: Subject: Re: [PATCH v3 01/18] platform: delay OF device-driver matches until late_initcall To: Rob Herring Cc: "linux-kernel@vger.kernel.org" , Rob Herring , Stephen Warren , Javier Martinez Canillas , Mark Brown , Thierry Reding , "Rafael J. Wysocki" , "linux-arm-kernel@lists.infradead.org" , Dmitry Torokhov , "devicetree@vger.kernel.org" , Linus Walleij , "linux-acpi@vger.kernel.org" , Arnd Bergmann Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1606 Lines: 38 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@vger.kernel.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 linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/