I have an issue with the backlight enable signal. As soon as I add the entry enable-gpios = <&gpio5 1 GPIO_ACTIVE_HIGH>; in the bl node of the device tree linux does no longer show anything under /sys/class/backlight. If I remove the entry “enable-gpios” I do see /sys/class/backlight and can use the brightness value to adjust the PWM settings. However due to the fact that the newer version of u-boot-toradex disables the backlight signal before booting Linux I need to be in control of the enable signal from the OS.
Do you have any tricks on how to debug the issue? I didn’t find any problems reported by dmesg.