I have just started with LP zero after a long history with other ARM based systems, but mostly using very old kernels, like 2.6
I tried both an as-is downloaded image of the whole filesystem and have built one using buildroot. Kernel 4.14 with:
I can load the lcd.ko module, but the directories /sys/class/pwm and /sys/class/backlight/ are empty with either kernel. The PWM is running at some level, started by u-boot, but how do I control it from Linux?