Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755792Ab3IMLpP (ORCPT ); Fri, 13 Sep 2013 07:45:15 -0400 Received: from mga11.intel.com ([192.55.52.93]:63010 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752346Ab3IMLpM (ORCPT ); Fri, 13 Sep 2013 07:45:12 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.90,897,1371106800"; d="scan'208";a="395231367" Date: Fri, 13 Sep 2013 14:50:35 +0300 From: Mika Westerberg To: Mark Brown Cc: Kevin Hilman , linux-i2c@vger.kernel.org, Wolfram Sang , "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Lv Zheng , Aaron Lu , linux-arm-kernel@lists.infradead.org, Dmitry Torokhov , Mauro Carvalho Chehab , Samuel Ortiz , Lee Jones , Arnd Bergmann , Greg Kroah-Hartman , Liam Girdwood , Kyungmin Park Subject: Re: [PATCH v2 1/9] i2c: prepare runtime PM support for I2C client devices Message-ID: <20130913115035.GB7393@intel.com> References: <1378913560-2752-1-git-send-email-mika.westerberg@linux.intel.com> <1378913560-2752-2-git-send-email-mika.westerberg@linux.intel.com> <87vc25pvvm.fsf@linaro.org> <20130913065434.GZ7393@intel.com> <20130913095950.GA29403@sirena.org.uk> <20130913101611.GA7393@intel.com> <20130913103152.GE29403@sirena.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130913103152.GE29403@sirena.org.uk> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo 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 Content-Length: 1068 Lines: 22 On Fri, Sep 13, 2013 at 11:31:52AM +0100, Mark Brown wrote: > On Fri, Sep 13, 2013 at 01:16:11PM +0300, Mika Westerberg wrote: > > On Fri, Sep 13, 2013 at 10:59:50AM +0100, Mark Brown wrote: > > > > Accessing the bus isn't an issue for I2C outside of ACPI, the power > > > management of the device is totally disassociated from the bus and the > > > controller is responsible for ensuring it is available during transfers. > > > Yes, but since we want to support ACPI as well, we must make sure that the > > adapter (and the associated controller) is available when client ->probe() > > is called. > > Right, but this probably needs to be highlighted more since it's a very > surprising thing for I2C and is causing confusion. By highlighted more, do you mean something like adding a comment in the code about this or? -- 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/