From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Cameron Subject: Re: ACPI ALS Status ? Date: Mon, 21 May 2012 09:07:51 +0100 Message-ID: <4FB9F7D7.7040007@cam.ac.uk> References: <1337562226.1503.12.camel@rui.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from ppsw-50.csi.cam.ac.uk ([131.111.8.150]:49650 "EHLO ppsw-50.csi.cam.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752367Ab2EUILI (ORCPT ); Mon, 21 May 2012 04:11:08 -0400 In-Reply-To: <1337562226.1503.12.camel@rui.sh.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Zhang Rui Cc: Corentin Chary , Len Brown , Pavel Machek , Dmitry Torokhov , linux acpi , Amit Kucheria , Jean Delvare On 5/21/2012 2:03 AM, Zhang Rui wrote: > On =E6=97=A5, 2012-05-20 at 15:09 +0200, Corentin Chary wrote: >> On Mon, Mar 5, 2012 at 10:12 AM, Corentin Chary >> wrote: >>> On Sun, Nov 6, 2011 at 11:16 PM, Len Brown wrote: >>>>> I was looking at the DSDT of a new samsung laptop (I can send you= the >>>>> output of acpidump if interested), and it export a standard ACPI = ALS >>>>> device. So, it's actually great to see vendor using that, but it = seems >>>>> that the series adding support for that and sent back in 2009 is = not >>>>> available in the kernel. I'd really like to use my the ALS, what'= s the >>>>> current status of the driver ? Still blocked because we don't hav= e a >>>>> generic sysfs class ? If yes, can't we just use a non-standard >>>>> interface ? It would still be better than no driver at all. >>>> >>>> Yes, I think ACPI ALS support has been waiting for hardware to jus= tify >>>> its existence. >>>> >>>> When it first entered the spec, we were excited to see it was pres= ent >>>> in some high-end laptops, but IIR on closer examination the AML tu= rned >>>> out to be dummy code. >>>> >>>> If you can verify that your Samsung really does implement ACPI ALS= , >>>> then that is all we need to stumble forward. >>>> >>>> thanks, >>>> -Len Brown, Intel Open Source Technology Center >>> >>> Hello, >>> >>> As stated in my previous mails, the implementation on this laptop i= s >>> perfectly functional, and since Windows 7 seems to be able to use >>> ACPI ALS nativelly [1] I suspect new (high end ?) laptop will all >>> support that. >>> Is there any plan to revive this driver for 3.4 or 3.5 ? Should >>> someone repost the last version of the previous patchset for >>> discussion ? >>> And no, on this laptop ALS is definitively not a gadget. >>> >>> Thanks, >>> >>> - http://download.microsoft.com/download/3/0/2/3027D574-C433-412A-A= 8B6-5E0A75D5B237/ambient-light-sensors.docx >> >> Adding more people that were interested in the previous discussion. >> What was the exact status of the als class ? Rui Zhang are you still >> interested in this ? >> Thanks, >> > well, I need some time to get updated about this. > Say I'm not sure if we still want to introduce an ALS class or we nee= d > to use drivers/staging/iio/ instead, today. Shortly the IIO core should (*fingers crossed*) move to drivers/iio/=20 It's queue up for the next merge window. driver/iio/light is probably a suitable place for acpi light sensor drivers. Don't think we've move= d any of the light sensors out of staging yet, but it's just a question o= f no one having had time to check them thoroughly rather than a=20 fundamental reason. At least one new sensor driver is targetting that=20 location but is still going through revisions.. ALS as a separate class died when Linus said he wouldn't pull it. > > BTW, you own this laptop, right? Can you send me the model name of th= is > laptop and its acpidump output? > > thanks, > rui > > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html