v4.19.13 snapshot.
diff --git a/include/linux/input/touchscreen.h b/include/linux/input/touchscreen.h
new file mode 100644
index 0000000..09d22cc
--- /dev/null
+++ b/include/linux/input/touchscreen.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014 Sebastian Reichel <sre@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#ifndef _TOUCHSCREEN_H
+#define _TOUCHSCREEN_H
+
+struct input_dev;
+struct input_mt_pos;
+
+struct touchscreen_properties {
+ unsigned int max_x;
+ unsigned int max_y;
+ bool invert_x;
+ bool invert_y;
+ bool swap_x_y;
+};
+
+void touchscreen_parse_properties(struct input_dev *input, bool multitouch,
+ struct touchscreen_properties *prop);
+
+void touchscreen_set_mt_pos(struct input_mt_pos *pos,
+ const struct touchscreen_properties *prop,
+ unsigned int x, unsigned int y);
+
+void touchscreen_report_pos(struct input_dev *input,
+ const struct touchscreen_properties *prop,
+ unsigned int x, unsigned int y,
+ bool multitouch);
+
+#endif