Atmel LCDC Contrast-as-Backlight control


Linux Kernel Configuration
└─> Device Drivers
└─> Graphics support
└─> Backlight & LCD device support
└─> Atmel LCDC Contrast-as-Backlight control

This provides a backlight control internal to the Atmel LCDC
driver. If the LCD "contrast control" on your board is wired
so it controls the backlight brightness, select this option to
export this as a PWM-based backlight control.

If in doubt, it's safe to enable this option; it doesn't kick
in unless the board's description says it's wired that way.