kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_BACKLIGHT_GPIO.
Result is shown for kernelversion 5.9.9

Generic GPIO based Backlight Driver

modulename: gpio_backlight.ko
configname: CONFIG_BACKLIGHT_GPIO

Linux Kernel Configuration
└─> Device Drivers
└─> Graphics support
└─> Backlight & LCD device support
└─> GPIO Support
└─> Generic GPIO based Backlight Driver

If you have a LCD backlight adjustable by GPIO, say Y to enable
this driver.


source code:


drivers/video/backlight/gpio_backlight.c