BackLight
From ArmadeusWiki
Installation
$ make linux-menuconfig
- Activate Lowlevel Backlight control in Device Drivers ---> Graphics support ---> Backlight & LCD device support
- Activate i.MXL backLight driver in Device Drivers ---> Armadeus specific drivers ---> Support for specific Armadeus drivers
- If built in kernel, reflash your kernel image; if selected as module either reflash your rootfs or copy backlight.ko, imx_bl.ko and .../lib/modules/2.6.18.1/modules.dep to your target. Then
$ modprobe imx_bl
Usage
All backlight controls are done through the /sys interface:
# ls /sys/class/backlight/imxl-bl/ actual_brightness max_brightness subsystem brightness power uevent
Consult the actual brightness:
# cat /sys/class/backlight/imxl-bl/actual_brightness
Consult the max allowed brightness:
# cat /sys/class/backlight/imxl-bl/max_brightness
Change brightness:
# echo 100 > /sys/class/backlight/imxl-bl/brightness