Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index 1197270..e0a3e59 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Elantech Touchpad driver (v6)
  *
  * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net>
  *
- * 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.
- *
  * Trademarks are the property of their respective owners.
  */
 
@@ -144,8 +141,15 @@
 	unsigned char debug;
 	unsigned char hw_version;
 	unsigned int fw_version;
+	unsigned int x_min;
+	unsigned int y_min;
+	unsigned int x_max;
+	unsigned int y_max;
 	unsigned int x_res;
 	unsigned int y_res;
+	unsigned int x_traces;
+	unsigned int y_traces;
+	unsigned int width;
 	unsigned int bus;
 	bool paritycheck;
 	bool jumpy_cursor;
@@ -153,6 +157,7 @@
 	bool crc_enabled;
 	bool set_hw_resolution;
 	bool has_trackpoint;
+	bool has_middle_button;
 	int (*send_cmd)(struct psmouse *psmouse, unsigned char c,
 			unsigned char *param);
 };
@@ -179,32 +184,18 @@
 	void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate);
 };
 
-#ifdef CONFIG_MOUSE_PS2_ELANTECH
 int elantech_detect(struct psmouse *psmouse, bool set_properties);
 int elantech_init_ps2(struct psmouse *psmouse);
+
+#ifdef CONFIG_MOUSE_PS2_ELANTECH
 int elantech_init(struct psmouse *psmouse);
 #else
-static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
 static inline int elantech_init(struct psmouse *psmouse)
 {
 	return -ENOSYS;
 }
-static inline int elantech_init_ps2(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
 #endif /* CONFIG_MOUSE_PS2_ELANTECH */
 
-#if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)
 int elantech_init_smbus(struct psmouse *psmouse);
-#else
-static inline int elantech_init_smbus(struct psmouse *psmouse)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */
 
 #endif