From: Alexander Holler <holler@ahsoftware.de>
To: Corentin Chary <corentincj@iksaif.net>
Cc: platform-driver-x86@vger.kernel.org, Zhang Rui <rui.zhang@intel.com>
Subject: Re: samsung-laptop: light sensor?
Date: Mon, 10 Sep 2012 13:09:52 +0200 [thread overview]
Message-ID: <504DCA80.7040305@ahsoftware.de> (raw)
In-Reply-To: <CAHR064iz1BTP71FMVb_3vYpx0+Jg9v56oZqMfJnu7K__mFO4Ng@mail.gmail.com>
Am 10.09.2012 11:27, schrieb Corentin Chary:
> On Sun, Sep 9, 2012 at 8:31 PM, Alexander Holler <holler@ahsoftware.de> wrote:
>> Hello,
>>
>> I'm searching some information about how to read the values from the
>> light sensor found on some Samsung laptops.
>>
>> Does anyone have any information about how to access the light sensor?
>> If I would find such information, I would (try) to write a driver (or
>> enhance samsung-laptop), at least to read the values and maybe something
>> to adjust the keyboard- and/or the lcd-backlight (on startup and maybe
>> dynamically at runtime).
>>
>> Regards,
>>
>> Alexander
>
> Hello Alexander,
> The light sensor can be used (on mine at least), but nobody had the
> time to write (rebase) the driver for it.
> Check these discussions:
> http://search.gmane.org/?query=ACPI+light+sensor&group=gmane.linux.acpi.devel
>
> Basically, it's a standard ACPI light sensor, there was a driver for
> it, but it should use another subsystem, and nobody did the work so
Thanks a lot for that hint. I've just booted an 3.5.3:
----
laptopah ~ # cat /sys/class/als/acpi_als0/illuminance
3230
----
Only a few modifications on the 2 patches from Zhang Rui were necessary
to build the driver for the als-acpi-device.
> far :). I'll happy to review if you have the time to do that.
I will have a look at the threads for those 2 patches and will check if
I can modify those patches for a next try for inclusion into the
mainline kernel (in the next weeks, as I will find time, I'm new to the
acpi-stuff in the kernel).
Regards,
Alexander
next prev parent reply other threads:[~2012-09-10 11:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-09 19:31 samsung-laptop: light sensor? Alexander Holler
2012-09-10 9:27 ` Corentin Chary
2012-09-10 11:09 ` Alexander Holler [this message]
2012-09-10 12:49 ` Corentin Chary
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