It is useful for userspace to know that there not dealing with a regular mouse but rather with a pointing stick (e.g. a trackpoint) so that userspace can e.g. automatically enable middle button scrollwheel emulation. It is impossible to tell the difference from the evdev info without resorting to putting a list of device / driver names in userspace, this is undesirable. Add a property which allows userspace to see if a device is a pointing stick, and set it on all the pointing stick drivers.
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| @@ -165,6 +165,7 @@ struct input_keymap_entry { · 164 unmodified lines | ||
| 165 | 165 | #define INPUT_PROP_BUTTONPAD 0x02 /* has button(s) under pad */ |
| 166 | 166 | #define INPUT_PROP_SEMI_MT 0x03 /* touch rectangle only */ |
| 167 | 167 | #define INPUT_PROP_TOPBUTTONPAD 0x04 /* softbuttons at top of pad */ |
| 168 | +#define INPUT_PROP_POINTING_STICK 0x05 /* is a pointing stick */ | |
| 168 | 169 | |
| 169 | 170 | #define INPUT_PROP_MAX 0x1f |
| 170 | 171 | #define INPUT_PROP_CNT (INPUT_PROP_MAX + 1) |