linux-kernel - Re: [PATCH V6 1/2] introduce ALS sysfs class

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Date:	Thu, 3 Sep 2009 09:35:52 +0100
From:	Alan Jenkins <sourcejedi.lkml@...glemail.com>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	Len Brown <lenb@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-acpi <linux-acpi@...r.kernel.org>,
	Greg KH <greg@...ah.com>, Pavel Machek <pavel@....cz>
Subject: Re: [PATCH V6 1/2] introduce ALS sysfs class

On 9/3/09, Zhang Rui <rui.zhang@...el.com> wrote:
> On Thu, 2009-09-03 at 03:22 +0800, Alan Jenkins wrote:
>> On 9/1/09, Zhang Rui <rui.zhang@...el.com> wrote:
>> >
>> > Introduce ALS sysfs class.
>> >
>> > ALS sysfs class provides a standard sysfs interface for
>> > Ambient Light Sensor devices.
>> >
>> > please read Documentation/ABI/testing/sysfs-class-als for
>> > detailed sysfs designs.
>> >
>> > CC: Pavel Machek <pavel@....cz>
>> > Acked-by: Greg Kroah-Hartman <gregkh@...e.de>
>> > Signed-off-by: Zhang Rui <rui.zhang@...el.com>
>> > ---
>>
>> > +++ linux-2.6/drivers/als/Kconfig
>> > @@ -0,0 +1,10 @@
>> > +#
>> > +# Ambient Light Sensor sysfs device configuration
>> > +#
>> > +
>> > +menuconfig ALS
>> > +	tristate "Ambient Light Sensor sysfs device"
>> > +	help
>> > +	  This framework provides a generic sysfs interface for
>> > +	  Ambient Light Sensor devices.
>> > +	  If you want this support, you should say Y or M here.
>>
>> Gratuitous nitpick:
>> Can this option be made non-visible (or hidden behind CONFIG_EMBEDDED)?
>>
>> Maybe you copied the pattern of the thermal sysfs interface - but the
>> ACPI thermal driver is useful to keep your computer cool even without
>> the sysfs interface.  ALS drivers are useless without the sysfs
>> interface, no?
>>
> ACPI ALS device driver is the first user of this sysfs class.
> I think there will be more native ALS device drivers in the future,
> which locate at drivers/als/ and depends on CONFIG_ALS.
>
> thanks,
> rui

Oh!  So it may become a menu like e.g. hwmon.

Thanks for the explanation
Alan
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