keyboard: add haptic feedback

shared/force_feedback.h

@@ -0,0 +1,20 @@
+/**
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#ifndef BBX_FORCE_FEEDBACK_H
+#define BBX_FORCE_FEEDBACK_H
+
+#include <libudev.h>
+
+/**
+ * Try to connect a force feedback device.
+ */
+void bbx_force_feedback_connect(struct udev_device* device);
+
+/**
+ * Play a force feedback effect.
+ */
+void bbx_force_feedback_play();
+
+#endif /* BBX_FORCE_FEEDBACK_H */