j6x0lcd - drvier to control Jornada 680 LCD

["Valeriy E. Ushakov" <uwe%ptc.spbu.ru@localhost>]

I've committed j6x0lcd(4) driver that controls power, brightness and
contrast of the 680's LCD:

    j6x0lcd* at shb?


Power control means that e.g. screenblank(1) or X screen saver can
turn the LCD completely off, thus saving power.

Brightness/contrast control are not controllable from any existing
userland program, I think (I hacked wsconsctl for my tests), but you
can map 

    Cmd_BrightnessUp
    Cmd_BrightnessDown
    Cmd_BrightnessRotate
    Cmd_ContrastUp
    Cmd_ContrastDown
    Cmd_ContrastRotate

somewhere to control it directly with the keyboard.

I think:

    keycode 200 = Cmd_BrightnessUp   Up
    keycode 203 = Cmd_ContrastDown   Left
    keycode 205 = Cmd_ContrastUp     Right
    keycode 208 = Cmd_BrightnessDown Down

is what most laptops use, so I'll probably commit that to the default
keymap.

SY, Uwe
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