Hi,
I've got LCD backlight brightness control working with a custom beagleboard design, with the LCD backlight pwm control signal connected to OMAP3503's gpt9_pwm_evt timer.
GPIO 96 is connected to the LCD LED enable pin for controlling the on/off for the LCD backlight.
I also see a bl_power file in /sys/class/backlight/beagleboard/ folder.
# ls /sys/class/backlight/beagleboard
uevent
subsystem
bl_power
brightness
actual_brightness
max_brightness
boost
pwm_fq
min_duty
power
I want to be able to fully turn the LCD backlight on and off. How do I map GPIO 96 to bl_power?
Right now, if I blank the LCD using the following command, it gives me a white screen, but the backlight doesn't turn off
$ echo 1 > /sys/class/graphics/fb0/blank
Elvis Dowson
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