Add tagging of trackballs

Currently unused, but oh, the possibilities...

The only thing we have to go on for trackballs at the moment is whether they
have "Trackball" in the name string. All others need to be manually tagged.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>

src/evdev.c

@@ -1736,6 +1736,7 @@ evdev_read_model_flags(struct evdev_device *device)
 		MODEL(ALPS_RUSHMORE),
 		MODEL(LENOVO_T450_TOUCHPAD),
 		MODEL(WOBBLY_TOUCHPAD),
+		MODEL(TRACKBALL),
 		{ NULL, EVDEV_MODEL_DEFAULT },
 #undef MODEL
 	};

src/evdev.h

@@ -116,6 +116,7 @@ enum evdev_device_model {
 	EVDEV_MODEL_ALPS_RUSHMORE = (1 << 16),
 	EVDEV_MODEL_LENOVO_T450_TOUCHPAD= (1 << 17),
 	EVDEV_MODEL_WOBBLY_TOUCHPAD = (1 << 18),
+	EVDEV_MODEL_TRACKBALL = (1 << 19),
 };
 
 struct mt_slot {

test/litest-device-logitech-trackball.c

@@ -53,7 +53,7 @@ static int events[] = {
 
 struct litest_test_device litest_logitech_trackball_device = {
 	.type = LITEST_LOGITECH_TRACKBALL,
-	.features = LITEST_RELATIVE | LITEST_BUTTON,
+	.features = LITEST_RELATIVE | LITEST_BUTTON | LITEST_TRACKBALL,
 	.shortname = "logitech trackball",
 	.setup = litest_logitech_trackball_setup,
 	.interface = NULL,

test/litest.h

@@ -228,6 +228,7 @@ enum litest_device_feature {
 	LITEST_TABLET_PAD = 1 << 21,
 	LITEST_RING = 1 << 22,
 	LITEST_STRIP = 1 << 23,
+	LITEST_TRACKBALL = 1 << 24,
 };
 
 struct litest_device {

udev/90-libinput-model-quirks.hwdb

@@ -146,3 +146,9 @@ libinput:name:SynPS/2 Synaptics TouchPad:dmi:*svnSystem76*pvrkudp1*
 ##########################################
 libinput:touchpad:input:b0003v056Ap*
  LIBINPUT_MODEL_WACOM_TOUCHPAD=1
+
+##########################################
+# Anything that has trackball in the name
+##########################################
+libinput:name:*Trackball*:dmi:*
+ LIBINPUT_MODEL_TRACKBALL=1