Exclude digitizers and similar devices from ID_CLASS joystick by
checking modalias for BTN_DIGI.
This was also done for linux kernel joydev interface in linux commit
d07a9cba6be5c0e947afc1014b5a62182a86f1f1.
DRIVERS=="psmouse", ENV{ID_CLASS}="mouse", GOTO="serial"
ATTRS{name}=="*dvb*|*DVB*|* IR *", ENV{ID_CLASS}="ir", GOTO="serial"
DRIVERS=="psmouse", ENV{ID_CLASS}="mouse", GOTO="serial"
ATTRS{name}=="*dvb*|*DVB*|* IR *", ENV{ID_CLASS}="ir", GOTO="serial"
-# joystick (ABS_X || ABS_WHEEL || ABS_THROTTLE) && !BTN_TOUCH
-ATTRS{modalias}=="input:*-*a[068],*|input:*-*a*,[68],*m*", ATTRS{modalias}!="input:*-*k*14A,*r*", \
+# joystick (ABS_X || ABS_WHEEL || ABS_THROTTLE) && !BTN_TOUCH && !BTN_DIGI
+ATTRS{modalias}=="input:*-*a[068],*|input:*-*a*,[68],*m*", ATTRS{modalias}!="input:*-*k*14[0A],*r*", \
ENV{ID_CLASS}="joystick", GOTO="serial"
# fill empty serial number
ENV{ID_CLASS}="joystick", GOTO="serial"
# fill empty serial number