Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759560AbZLOOw3 (ORCPT ); Tue, 15 Dec 2009 09:52:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757663AbZLOOw2 (ORCPT ); Tue, 15 Dec 2009 09:52:28 -0500 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:41944 "EHLO opensource2.wolfsonmicro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756587AbZLOOw1 (ORCPT ); Tue, 15 Dec 2009 09:52:27 -0500 Date: Tue, 15 Dec 2009 14:52:25 +0000 From: Mark Brown To: Alberto Panizzo Cc: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , linux-kernel , linux-arm-kernel-infradead , Samuel Ortiz , Liam Girdwood , Sascha linux-arm Subject: Re: [PATCH 4/4] regulator: mc13783-regulator: correct the probing time. Message-ID: <20091215145225.GA29034@rakim.wolfsonmicro.main> References: <1260808880.2022.98.camel@climbing-alby> <1260810776.2022.130.camel@climbing-alby> <1260811085.2022.135.camel@climbing-alby> <1260811598.2022.144.camel@climbing-alby> <1260813215.2022.171.camel@climbing-alby> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1260813215.2022.171.camel@climbing-alby> X-Cookie: Put no trust in cryptic comments. User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1050 Lines: 22 On Mon, Dec 14, 2009 at 06:53:35PM +0100, Alberto Panizzo wrote: > When the mc13783-regulator driver is built in kernel, probing it during > the regulator subsystem initialisation result in a fault. > > That is because regulator subsystem is planned to be initialised very early > in the boot process, before the mfd subsystem initialisation. > > The mc12783-regulator probing process need to access to the mc13783-core > functionality to read/write mc13783 registers and so must be called after > the mc13783-core driver initialisation. > > The way to do this is to let the kernel probe the mc13783-regulator driver when > mc13783-core register his regulator subdevice. > > Signed-off-by: Alberto Panizzo Acked-by: Mark Brown -- 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/