diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 510e7c0622d30206c5a38de5da36b154eb2dd88c..07e40a58e66c01f1b49c0910ade8040c7105f794 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1793,11 +1793,11 @@ static int elantech_setup_smbus(struct psmouse *psmouse,
 
 	if (elantech_smbus == ELANTECH_SMBUS_NOT_SET) {
 		/*
-		 * FIXME:
-		 * constraint the I2C capable devices by using FW version,
-		 * board version, or by using DMI matching
+		 * New ICs are enabled by default.
+		 * Old ICs are up to the user to decide.
 		 */
-		return -ENXIO;
+		if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version))
+			return -ENXIO;
 	}
 
 	psmouse_info(psmouse, "Trying to set up SMBus access\n");
@@ -1818,6 +1818,9 @@ static int elantech_setup_smbus(struct psmouse *psmouse,
 static bool elantech_use_host_notify(struct psmouse *psmouse,
 				     struct elantech_device_info *info)
 {
+	if (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version))
+		return true;
+
 	switch (info->bus) {
 	case ETP_BUS_PS2_ONLY:
 		/* expected case */
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index f9b1c485e8d985fa6f9053063918cdf7a9237bd9..119727085a6055e9cc289da522cec6de03e6888d 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -115,6 +115,21 @@
 #define ETP_BUS_PS2_SMB_ALERT		3
 #define ETP_BUS_PS2_SMB_HST_NTFY	4
 
+/*
+ * New ICs are either using SMBus Host Notify or just plain PS2.
+ *
+ * ETP_FW_VERSION_QUERY is:
+ * Byte 1:
+ *  - bit 0..3: IC BODY
+ * Byte 2:
+ *  - bit 4: HiddenButton
+ *  - bit 5: PS2_SMBUS_NOTIFY
+ *  - bit 6: PS2CRCCheck
+ */
+#define ETP_NEW_IC_SMBUS_HOST_NOTIFY(fw_version)	\
+		((((fw_version) & 0x0f2000) == 0x0f2000) && \
+		 ((fw_version) & 0x0000ff) > 0)
+
 /*
  * The base position for one finger, v4 hardware
  */