Input: psmouse - use IS_ENABLED instead of homegrown code

Instead of having various protocols provide <protocol>_supported()
functions, let's use IS_ENABLED() macro that works well in "if" statements.
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/cypress_ps2.c

@@ -710,8 +710,3 @@ int cypress_init(struct psmouse *psmouse)
 
 	return -1;
 }
-
-bool cypress_supported(void)
-{
-	return true;
-}

drivers/input/mouse/cypress_ps2.h

@@ -172,7 +172,6 @@ struct cytp_data {
 #ifdef CONFIG_MOUSE_PS2_CYPRESS
 int cypress_detect(struct psmouse *psmouse, bool set_properties);
 int cypress_init(struct psmouse *psmouse);
-bool cypress_supported(void);
 #else
 inline int cypress_detect(struct psmouse *psmouse, bool set_properties)
 {
@@ -182,10 +181,6 @@ inline int cypress_init(struct psmouse *psmouse)
 {
 	return -ENOSYS;
 }
-inline bool cypress_supported(void)
-{
-	return 0;
-}
 #endif /* CONFIG_MOUSE_PS2_CYPRESS */
 
 #endif  /* _CYPRESS_PS2_H */

drivers/input/mouse/focaltech.c

@@ -424,11 +424,6 @@ int focaltech_init(struct psmouse *psmouse)
 	return error;
 }
 
-bool focaltech_supported(void)
-{
-	return true;
-}
-
 #else /* CONFIG_MOUSE_PS2_FOCALTECH */
 
 int focaltech_init(struct psmouse *psmouse)
@@ -438,9 +433,4 @@ int focaltech_init(struct psmouse *psmouse)
 	return 0;
 }
 
-bool focaltech_supported(void)
-{
-	return false;
-}
-
 #endif /* CONFIG_MOUSE_PS2_FOCALTECH */

drivers/input/mouse/focaltech.h

@@ -19,6 +19,5 @@
 
 int focaltech_detect(struct psmouse *psmouse, bool set_properties);
 int focaltech_init(struct psmouse *psmouse);
-bool focaltech_supported(void);
 
 #endif

drivers/input/mouse/psmouse-base.c

@@ -727,7 +727,7 @@ static int psmouse_extensions(struct psmouse *psmouse,
 	if (psmouse_do_detect(focaltech_detect, psmouse, set_properties) == 0) {
 		if (max_proto > PSMOUSE_IMEX) {
 			if (!set_properties || focaltech_init(psmouse) == 0) {
-				if (focaltech_supported())
+				if (IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH))
 					return PSMOUSE_FOCALTECH;
 				/*
 				 * Note that we need to also restrict
@@ -776,7 +776,7 @@ static int psmouse_extensions(struct psmouse *psmouse,
  * Try activating protocol, but check if support is enabled first, since
  * we try detecting Synaptics even when protocol is disabled.
  */
-			if (synaptics_supported() &&
+			if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) &&
 			    (!set_properties || synaptics_init(psmouse) == 0)) {
 				return PSMOUSE_SYNAPTICS;
 			}
@@ -801,7 +801,7 @@ static int psmouse_extensions(struct psmouse *psmouse,
  */
 	if (max_proto > PSMOUSE_IMEX &&
 			cypress_detect(psmouse, set_properties) == 0) {
-		if (cypress_supported()) {
+		if (IS_ENABLED(CONFIG_MOUSE_PS2_CYPRESS)) {
 			if (cypress_init(psmouse) == 0)
 				return PSMOUSE_CYPRESS;
 

drivers/input/mouse/synaptics.c

@@ -1454,11 +1454,6 @@ int synaptics_init_relative(struct psmouse *psmouse)
 	return __synaptics_init(psmouse, false);
 }
 
-bool synaptics_supported(void)
-{
-	return true;
-}
-
 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
 
 void __init synaptics_module_init(void)
@@ -1470,9 +1465,4 @@ int synaptics_init(struct psmouse *psmouse)
 	return -ENOSYS;
 }
 
-bool synaptics_supported(void)
-{
-	return false;
-}
-
 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */

drivers/input/mouse/synaptics.h

@@ -175,6 +175,5 @@ int synaptics_detect(struct psmouse *psmouse, bool set_properties);
 int synaptics_init(struct psmouse *psmouse);
 int synaptics_init_relative(struct psmouse *psmouse);
 void synaptics_reset(struct psmouse *psmouse);
-bool synaptics_supported(void);
 
 #endif /* _SYNAPTICS_H */