BTN_START 395 include/dt-bindings/input/linux-event-codes.h #define BTN_START 0x13b BTN_START 395 include/uapi/linux/input-event-codes.h #define BTN_START 0x13b BTN_START 395 scripts/dtc/include-prefixes/dt-bindings/input/linux-event-codes.h #define BTN_START 0x13b