Adding SetLCDBrightness and GetLCDBrightess for PMU users, and other fixes

[Richard Hughes]

On Wed, 2005-11-02 at 10:47 -0500, David Zeuthen wrote:
> On Tue, 2005-11-01 at 14:56 +0000, Richard Hughes wrote:
> > Can somebody test this on a powerbook / ibook please and check I've not
> > broken anything. It should all be okay as it's pretty standard stuff.
> 
> At the moment my Powerbook 12" doesn't run Linux. Even if it did the LCD
> brightness cannot be adjusted (because of driver limitations) - do you
> plan to have a whitelist for this?

Erm.. I assumed the failure of the ioctl would signify that the driver
could not perform the action...

This patch was very much testing the waters as I don't have a powerbook
myself, but I have a couple of people testing powerbook stuff for me on
the g-p-m m/l.

Richard.