Dear Linus, Your commit b71377b3e1e0 ("ARM: ixp4xx: Delete the Freecom FSG-3 boardfiles") removes the config MACH_FSG. Hence, the config LEDS_FSG and its corresponding driver leds-fsg.c is effectively not selectable. I do not know much about how with device trees we ensure that specific drivers are selected, or how Kconfig build dependencies are combined with device trees properly here. So, I do not know what the right patch is here. Was it intended that this code is now made obsolete? Can this driver really be deleted? Or does it require just some further adjustment to make the leds-fsg driver productive again? This issue was identified with ./scripts/checkkconfigsymbols.py, which reports the following reference to an undefined config: MACH_FSG Referencing files: drivers/leds/Kconfig I am happy to support creating a patch, once I understand what needs to be done in this case. Best regards, Lukas