usb: typec: Stub out typec_switch APIs when CONFIG_TYPEC=n

Ease driver development by adding stubs for the typec_switch APIs when
CONFIG_TYPEC=n. Copy the same method used for the typec_mux APIs to be
consistent.

Acked-by: Greg Kroah-Hartman <[e-mail]>
Reviewed-by: Heikki Krogerus <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>
Signed-off-by: Xu Yang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

include/linux/usb/typec_mux.h

···
 #ifndef __USB_TYPEC_MUX
 #define __USB_TYPEC_MUX
 
+#include <linux/err.h>
 #include <linux/property.h>
 #include <linux/usb/typec.h>
 
···
 	void *drvdata;
 };
 
+#if IS_ENABLED(CONFIG_TYPEC)
+
 struct typec_switch *fwnode_typec_switch_get(struct fwnode_handle *fwnode);
 void typec_switch_put(struct typec_switch *sw);
 int typec_switch_set(struct typec_switch *sw,
 		     enum typec_orientation orientation);
-
-static inline struct typec_switch *typec_switch_get(struct device *dev)
-{
-	return fwnode_typec_switch_get(dev_fwnode(dev));
-}
 
 struct typec_switch_dev *
 typec_switch_register(struct device *parent,
···
 
 void typec_switch_set_drvdata(struct typec_switch_dev *sw, void *data);
 void *typec_switch_get_drvdata(struct typec_switch_dev *sw);
+
+#else
+
+static inline struct typec_switch *
+fwnode_typec_switch_get(struct fwnode_handle *fwnode)
+{
+	return NULL;
+}
+
+static inline void typec_switch_put(struct typec_switch *sw) {}
+
+static inline int typec_switch_set(struct typec_switch *sw,
+				   enum typec_orientation orientation)
+{
+	return 0;
+}
+
+static inline struct typec_switch_dev *
+typec_switch_register(struct device *parent,
+		      const struct typec_switch_desc *desc)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+static inline void typec_switch_unregister(struct typec_switch_dev *sw) {}
+
+static inline void typec_switch_set_drvdata(struct typec_switch_dev *sw, void *data) {}
+static inline void *typec_switch_get_drvdata(struct typec_switch_dev *sw)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+
+#endif /* CONFIG_TYPEC */
+
+static inline struct typec_switch *typec_switch_get(struct device *dev)
+{
+	return fwnode_typec_switch_get(dev_fwnode(dev));
+}
 
 struct typec_mux_state {
 	struct typec_altmode *alt;