From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754869Ab3K0Pa3 (ORCPT ); Wed, 27 Nov 2013 10:30:29 -0500 Received: from mail-yh0-f51.google.com ([209.85.213.51]:33252 "EHLO mail-yh0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751921Ab3K0Pa2 (ORCPT ); Wed, 27 Nov 2013 10:30:28 -0500 Date: Wed, 27 Nov 2013 15:30:19 +0000 From: Lee Jones To: Stefan Agner Cc: swarren@wwwdotorg.org, thierry.reding@gmail.com, sameo@linux.intel.com, dev@lynxeye.de, mark.rutland@arm.com, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 1/3] mfd: tps6586x: add version detection Message-ID: <20131127153019.GR3296@lee--X1> References: <20131127130954.GF3296@lee--X1> <20131127135547.GK3296@lee--X1> <20131127143429.GN3296@lee--X1> <20131127143641.GO3296@lee--X1> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: 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 Wed, 27 Nov 2013, Stefan Agner wrote: > Am 2013-11-27 15:36, schrieb Lee Jones: > > >> Perhaps I should suggest to make TPS6586X_ANY a positive number then, > >> as a negative value to me indicates more of an error than a generic > >> parameter. > I see, its especially confusing since the version is filled using the > i2c_smbus_read_byte_data functions return value. The version field is a > 8-Bit value according to the data sheet, I could use 0x100 as > TPS6586X_ANY identifier. How far are we away from using 0xFF? I'd be happy to use that and change it _if_ we ever get close. If it's likely that it'll be used, then sure 0x100 sounds okay too. -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog