BTN_BACK 361 include/dt-bindings/input/linux-event-codes.h #define BTN_BACK 0x116 BTN_BACK 361 include/uapi/linux/input-event-codes.h #define BTN_BACK 0x116 BTN_BACK 361 scripts/dtc/include-prefixes/dt-bindings/input/linux-event-codes.h #define BTN_BACK 0x116