menuconfig POWER_SUPPLY tristate "Power supply class support" help Say Y here to enable power supply class support. This allows power supply (batteries, AC, USB) monitoring by userspace via sysfs and uevent (if available) and/or APM kernel interface (if selected below). if POWER_SUPPLY config POWER_SUPPLY_DEBUG bool "Power supply debug" help Say Y here to enable debugging messages for power supply class and drivers. endif # POWER_SUPPLY