@@ -610,8 +610,12 @@ static int psmouse_extensions(struct psmouse *psmouse,
synaptics_hardware = 1;
if (max_proto > PSMOUSE_IMEX) {
- if (!set_properties || synaptics_init(psmouse) == 0)
+ /* be careful to only offer the synaptics protocol for use when
+ * the support is available */
+ if (synaptics_supported() &&
+ (!set_properties || synaptics_init(psmouse) == 0))
return PSMOUSE_SYNAPTICS;
+
/*
* Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
* Unfortunately Logitech/Genius probes confuse some firmware versions so
@@ -738,6 +738,11 @@ int synaptics_init(struct psmouse *psmouse)
return -1;
}
+int synaptics_supported(void)
+{
+ return 1;
+}
+
#else /* CONFIG_MOUSE_PS2_SYNAPTICS */
int synaptics_init(struct psmouse *psmouse)
@@ -745,5 +750,10 @@ int synaptics_init(struct psmouse *psmouse)
return -ENOSYS;
}
+int synaptics_supported(void)
+{
+ return 0;
+}
+
#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
@@ -108,5 +108,6 @@ struct synaptics_data {
int synaptics_detect(struct psmouse *psmouse, int set_properties);
int synaptics_init(struct psmouse *psmouse);
void synaptics_reset(struct psmouse *psmouse);
+int synaptics_supported(void);
#endif /* _SYNAPTICS_H */