Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752779AbZGOI0P (ORCPT ); Wed, 15 Jul 2009 04:26:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752518AbZGOI0O (ORCPT ); Wed, 15 Jul 2009 04:26:14 -0400 Received: from dan.rpsys.net ([93.97.175.187]:64332 "EHLO dan.rpsys.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752196AbZGOI0N (ORCPT ); Wed, 15 Jul 2009 04:26:13 -0400 Subject: Re: [PATCH 1/3] backlight: Allow drivers to update the core, and generate events on changes From: Richard Purdie To: Zhang Rui Cc: Matthew Garrett , "linux-kernel@vger.kernel.org" , "linux-acpi@vger.kernel.org" , "lenb@kernel.org" , "corentincj@iksaif.net" In-Reply-To: <1247644518.26272.88.camel@rzhang-dt> References: <1247517685-7719-1-git-send-email-mjg@redhat.com> <1247574573.23871.8.camel@dax.rpnet.com> <1247644518.26272.88.camel@rzhang-dt> Content-Type: text/plain Date: Wed, 15 Jul 2009 09:22:33 +0100 Message-Id: <1247646153.6248.3.camel@dax.rpnet.com> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1221 Lines: 36 On Wed, 2009-07-15 at 15:55 +0800, Zhang Rui wrote: > > Also, are "userspace" and "kernel" as meaningful as they could be? > Would > > "sysfs" and "hwkeys" make more sense and allow for other future hardware > > differences? Perhaps someone will tie the backlight to an ambient light > > sensor for example... > > > > Hah, I just finished a patch to introduce the ACPI als driver. > > I'm not quite familiar with the status of ALS support in Linux kernel. > and here is my questions, > I don't think we have a generic sysfs driver for ALS, i.e. ALS class > device, right? > do you guys think it's reasonable to have one? We don't have one that I'm aware of. The first question is what information and configuration options are we likely to have with ALS sensors? If its just a light level reading, the input subsystem is ideally suited for sharing that. Is there configuration we need to expose? Cheers, Richard -- Richard Purdie Intel Open Source Technology Centre -- 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/