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SubjectRe: Git backlight subsystem tree
On Thu, Feb 08, 2007 at 09:54:21PM +0000, James Simmons wrote:
>
> > On Thu, Feb 08, 2007 at 06:32:02PM +0000, James Simmons wrote:
> > > On Thu, 8 Feb 2007, Richard Purdie wrote:
> > >
> > > > On Thu, 2007-02-08 at 15:28 +0000, James Simmons wrote:
> > > > > I have some patches that move the backlight away from using the class
> > > > > stuff. The only problem is the patch requires all backlight devices
> > > > > to be linked to a real struct device. Right now the acpi backligths are
> > > > > not.
> > > >
> > > > Why would you want to do that?
> > > >
> > > > The whole point of having this is so that backlights appear as a
> > > > standard interface under /sys/class/backlight.
> > > >
> > > > An example of why standardised interfaces are good would be someone
> > > > writing an applet for a handheld to control the backlight brightness.
> > > > With the class in place, the applet can easily work with any backlight.
> > > > Without it, it has to be written for each backlight.
> > > >
> > > > So this is a very strong NAK but I'm curious why you'd want to do it...
> > >
> > > I CC Greg to explain. The backlight class didn't go away. The way it is
> > > handled is different.
> >
> > Have a pointer to the patch so I can help explain better?
> >
> > As a short summary, 'struct class_device' is going away. Using a
> > 'struct device' in its place is what the conversion should have just
> > done, no functionality change otherwise.
>
> diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c

<snip>

Looks good to me. And it makes the code simpler too :)

thanks,

greg k-h
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