BTN_TOOL_QUADTAP  347 include/dt-bindings/input/input.h #define BTN_TOOL_QUADTAP	0x14f	/* Four fingers on trackpad */
BTN_TOOL_QUADTAP  553 include/uapi/linux/input.h #define BTN_TOOL_QUADTAP	0x14f	/* Four fingers on trackpad */