linux-kernel - Re: [PATCH] Dell laptop backlight driver

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Message-ID: <20071028161955.GF23359@auslistsprd01.us.dell.com>
Date:	Sun, 28 Oct 2007 11:19:55 -0500
From:	Matt Domsch <Matt_Domsch@...l.com>
To:	jack@...onello.org
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Dell laptop backlight driver

On Sun, Oct 28, 2007 at 05:12:37PM +0100, jack@...onello.org wrote:
> Hello,
> this driver implements backlight control on Dell laptops
> which use SMI  for changing brightness levels.
> 
> The driver is INCOMPLETE since it is unable to probe some required 
> parameters
> in order to perform backlight control. Such parameters are found in a Dell
> proprietary DMI table which should be parsed. For now external tools may be
> used to find these parameters by hand. So if you intend to try this out,
> FIRST write your laptop model parameters correctly inside the source code
> as explained in Documentation/dell-laptop.txt.
> 
> Parts of this driver may also be used to provide additional functionalities
> similarly to the drivers/misc/*-laptop.c drivers.

Why is this better done in the kernel rather than in userspace with
libsmbios as you've noted?

-- 
Matt Domsch
Linux Technology Strategist, Dell Office of the CTO
linux.dell.com & www.dell.com/linux
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