From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753291Ab2LJOIB (ORCPT ); Mon, 10 Dec 2012 09:08:01 -0500 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:53127 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752189Ab2LJOIA (ORCPT ); Mon, 10 Dec 2012 09:08:00 -0500 Date: Mon, 10 Dec 2012 23:07:52 +0900 From: Mark Brown To: Lee Jones Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, arnd@arndb.de, linus.walleij@stericsson.com, ulf.hansson@linaro.org Subject: Re: [PATCH 01/12] regulator: gpio-regulator: Demote GPIO Regulator driver to start later Message-ID: <20121210140751.GB6103@opensource.wolfsonmicro.com> References: <1355129761-8088-1-git-send-email-lee.jones@linaro.org> <1355129761-8088-2-git-send-email-lee.jones@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1355129761-8088-2-git-send-email-lee.jones@linaro.org> X-Cookie: You dialed 5483. User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 10, 2012 at 08:55:50AM +0000, Lee Jones wrote: > The normal course of action would be to defer the MMCI driver too, > but these IOS level-shifter regulators aren't present on all > platforms, so deferring until one is found would be incorrect. > So the best solution is to demote the GPIO Regulator driver, so > it starts later than the TC35892 GPIO controller, which is also > configured to start at subsys_initcall() time, but before deferred > probing time, which starts at late_initcall(), after many of the > drivers requiring these regulators would have already started. This really isn't a good solution, especially not for a system that's DT based - on a DT system we can tell if there should be a GPIO present so we should be able to defer only when there's something that might provide the GPIO later on.