diff --git a/plugins/superio/fu-plugin-superio.c b/plugins/superio/fu-plugin-superio.c
index 2af14b5d7..a03cc6482 100644
--- a/plugins/superio/fu-plugin-superio.c
+++ b/plugins/superio/fu-plugin-superio.c
@@ -8,7 +8,7 @@
 
 #include "fu-plugin-vfuncs.h"
 
-#include "fu-superio-device.h"
+#include "fu-superio-it85-device.h"
 
 #define		FU_QUIRKS_SUPERIO_CHIPSETS		"SuperioChipsets"
 
@@ -41,12 +41,26 @@ fu_plugin_superio_coldplug_chipset (FuPlugin *plugin, const gchar *chipset, GErr
 		return FALSE;
 	}
 
-	/* create IT8xxx */
-	dev = g_object_new (FU_TYPE_SUPERIO_DEVICE,
-			    "chipset", chipset,
-			    "id", id,
-			    "port", port,
-			    NULL);
+	/* create IT89xx or IT89xx */
+	if (id >> 8 == 0x85) {
+		dev = g_object_new (FU_TYPE_SUPERIO_IT85_DEVICE,
+				    "chipset", chipset,
+				    "id", id,
+				    "port", port,
+				    NULL);
+	} else if (id >> 8 == 0x89) {
+		dev = g_object_new (FU_TYPE_SUPERIO_DEVICE,
+				    "chipset", chipset,
+				    "id", id,
+				    "port", port,
+				    NULL);
+	} else {
+		g_set_error (error,
+			     G_IO_ERROR,
+			     G_IO_ERROR_NOT_SUPPORTED,
+			     "SuperIO chip %s has unsupported Id", chipset);
+		return FALSE;
+	}
 
 	/* unlock */
 	locker = fu_device_locker_new (dev, error);
diff --git a/plugins/superio/fu-superio-device.c b/plugins/superio/fu-superio-device.c
index 2a9e6d892..e7f203b4c 100644
--- a/plugins/superio/fu-superio-device.c
+++ b/plugins/superio/fu-superio-device.c
@@ -17,10 +17,6 @@
 
 #define FU_PLUGIN_SUPERIO_TIMEOUT	0.25 /* s */
 
-/* unknown source, IT87 only */
-#define SIO_CMD_EC_GET_NAME_STR		0x92
-#define SIO_CMD_EC_GET_VERSION_STR	0x93
-
 typedef struct
 {
 	gint			 fd;
@@ -206,7 +202,7 @@ fu_superio_device_ec_write1 (FuSuperioDevice *self, guint8 data, GError **error)
 	return fu_superio_outb (priv->fd, priv->pm1_iobad1, data, error);
 }
 
-static gboolean
+gboolean
 fu_superio_device_ec_flush (FuSuperioDevice *self, GError **error)
 {
 	FuSuperioDevicePrivate *priv = GET_PRIVATE (self);
@@ -231,7 +227,7 @@ fu_superio_device_ec_flush (FuSuperioDevice *self, GError **error)
 	return TRUE;
 }
 
-static gboolean
+gboolean
 fu_superio_device_ec_get_param (FuSuperioDevice *self, guint8 param, guint8 *data, GError **error)
 {
 	if (!fu_superio_device_ec_write1 (self, SIO_CMD_EC_READ, error))
@@ -253,23 +249,6 @@ fu_superio_device_ec_set_param (FuSuperioDevice *self, guint8 param, guint8 data
 }
 #endif
 
-static gchar *
-fu_superio_device_ec_get_str (FuSuperioDevice *self, guint8 idx, GError **error)
-{
-	GString *str = g_string_new (NULL);
-	if (!fu_superio_device_ec_write1 (self, idx, error))
-		return NULL;
-	for (guint i = 0; i < 0xff; i++) {
-		guint8 c = 0;
-		if (!fu_superio_device_ec_read (self, &c, error))
-			return NULL;
-		if (c == '$')
-			break;
-		g_string_append_c (str, c);
-	}
-	return g_string_free (str, FALSE);
-}
-
 static gboolean
 fu_superio_device_open (FuDevice *device, GError **error)
 {
@@ -306,40 +285,6 @@ fu_superio_device_probe (FuDevice *device, GError **error)
 	return TRUE;
 }
 
-static gboolean
-fu_superio_device_setup_it85xx (FuSuperioDevice *self, GError **error)
-{
-	guint8 size_tmp = 0;
-	g_autofree gchar *name = NULL;
-	g_autofree gchar *version = NULL;
-
-	/* get EC size */
-	if (!fu_superio_device_ec_flush (self, error)) {
-		g_prefix_error (error, "failed to flush: ");
-		return FALSE;
-	}
-	if (!fu_superio_device_ec_get_param (self, 0xe5, &size_tmp, error)) {
-		g_prefix_error (error, "failed to get EC size: ");
-		return FALSE;
-	}
-	fu_device_set_firmware_size (FU_DEVICE (self), ((guint32) size_tmp) << 10);
-
-	/* get EC strings */
-	name = fu_superio_device_ec_get_str (self, SIO_CMD_EC_GET_NAME_STR, error);
-	if (name == NULL) {
-		g_prefix_error (error, "failed to get EC name: ");
-		return FALSE;
-	}
-	fu_device_set_name (FU_DEVICE (self), name);
-	version = fu_superio_device_ec_get_str (self, SIO_CMD_EC_GET_VERSION_STR, error);
-	if (version == NULL) {
-		g_prefix_error (error, "failed to get EC version: ");
-		return FALSE;
-	}
-	fu_device_set_version (FU_DEVICE (self), version);
-	return TRUE;
-}
-
 static gboolean
 fu_superio_device_it89xx_read_ec_register (FuSuperioDevice *self,
 					   guint16 addr,
@@ -450,6 +395,7 @@ fu_superio_device_setup_it89xx (FuSuperioDevice *self, GError **error)
 static gboolean
 fu_superio_device_setup (FuDevice *device, GError **error)
 {
+	FuSuperioDeviceClass *klass = FU_SUPERIO_DEVICE_GET_CLASS (device);
 	FuSuperioDevice *self = FU_SUPERIO_DEVICE (device);
 	FuSuperioDevicePrivate *priv = GET_PRIVATE (self);
 	guint8 tmp = 0x0;
@@ -506,11 +452,9 @@ fu_superio_device_setup (FuDevice *device, GError **error)
 		fu_common_dump_raw (G_LOG_DOMAIN, "EC Registers", buf, 0x100);
 	}
 
-	/* IT85xx */
-	if (priv->id >> 8 == 0x85) {
-		if (!fu_superio_device_setup_it85xx (self, error))
-			return FALSE;
-	}
+	/* subclassed setup */
+	if (klass->setup != NULL)
+		return klass->setup (self, error);
 
 	/* IT89xx */
 	if (priv->id >> 8 == 0x89) {
diff --git a/plugins/superio/fu-superio-device.h b/plugins/superio/fu-superio-device.h
index e3992302a..38023cf97 100644
--- a/plugins/superio/fu-superio-device.h
+++ b/plugins/superio/fu-superio-device.h
@@ -16,8 +16,12 @@ G_DECLARE_DERIVABLE_TYPE (FuSuperioDevice, fu_superio_device, FU, SUPERIO_DEVICE
 struct _FuSuperioDeviceClass
 {
 	FuDeviceClass		parent_class;
+	gboolean		 (*setup)	(FuSuperioDevice	*self,
+						 GError		**error);
 };
 
+gboolean	 fu_superio_device_ec_flush	(FuSuperioDevice	*self,
+						 GError			**error);
 gboolean	 fu_superio_device_ec_read	(FuSuperioDevice	*self,
 						 guint8			*data,
 						 GError			**error);
@@ -27,6 +31,10 @@ gboolean	 fu_superio_device_ec_write0	(FuSuperioDevice	*self,
 gboolean	 fu_superio_device_ec_write1	(FuSuperioDevice	*self,
 						 guint8			 data,
 						 GError			**error);
+gboolean	 fu_superio_device_ec_get_param	(FuSuperioDevice	*self,
+						 guint8			 param,
+						 guint8			*data,
+						 GError			**error);
 gboolean	 fu_superio_device_regval	(FuSuperioDevice	*self,
 						 guint8			 addr,
 						 guint8			*data,
diff --git a/plugins/superio/fu-superio-it85-device.c b/plugins/superio/fu-superio-it85-device.c
new file mode 100644
index 000000000..33372175a
--- /dev/null
+++ b/plugins/superio/fu-superio-it85-device.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2018-2019 Richard Hughes <richard@hughsie.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+#include "config.h"
+
+#include "fu-chunk.h"
+#include "fu-superio-common.h"
+#include "fu-superio-it85-device.h"
+
+struct _FuSuperioIt85Device {
+	FuSuperioDevice		 parent_instance;
+};
+
+G_DEFINE_TYPE (FuSuperioIt85Device, fu_superio_it85_device, FU_TYPE_SUPERIO_DEVICE)
+
+static gchar *
+fu_superio_it85_device_get_str (FuSuperioDevice *self, guint8 idx, GError **error)
+{
+	GString *str = g_string_new (NULL);
+	if (!fu_superio_device_ec_write1 (self, idx, error))
+		return NULL;
+	for (guint i = 0; i < 0xff; i++) {
+		guint8 c = 0;
+		if (!fu_superio_device_ec_read (self, &c, error))
+			return NULL;
+		if (c == '$')
+			break;
+		g_string_append_c (str, c);
+	}
+	return g_string_free (str, FALSE);
+}
+
+static gboolean
+fu_superio_it85_device_setup (FuSuperioDevice *self, GError **error)
+{
+	guint8 size_tmp = 0;
+	g_autofree gchar *name = NULL;
+	g_autofree gchar *version = NULL;
+
+	/* get EC size */
+	if (!fu_superio_device_ec_flush (self, error)) {
+		g_prefix_error (error, "failed to flush: ");
+		return FALSE;
+	}
+	if (!fu_superio_device_ec_get_param (self, 0xe5, &size_tmp, error)) {
+		g_prefix_error (error, "failed to get EC size: ");
+		return FALSE;
+	}
+	fu_device_set_firmware_size (FU_DEVICE (self), ((guint32) size_tmp) << 10);
+
+	/* get EC strings */
+	name = fu_superio_it85_device_get_str (self, SIO_CMD_EC_GET_NAME_STR, error);
+	if (name == NULL) {
+		g_prefix_error (error, "failed to get EC name: ");
+		return FALSE;
+	}
+	fu_device_set_name (FU_DEVICE (self), name);
+	version = fu_superio_it85_device_get_str (self, SIO_CMD_EC_GET_VERSION_STR, error);
+	if (version == NULL) {
+		g_prefix_error (error, "failed to get EC version: ");
+		return FALSE;
+	}
+	fu_device_set_version (FU_DEVICE (self), version);
+	return TRUE;
+}
+
+static void
+fu_superio_it85_device_init (FuSuperioIt85Device *self)
+{
+}
+
+static void
+fu_superio_it85_device_class_init (FuSuperioIt85DeviceClass *klass)
+{
+	FuSuperioDeviceClass *klass_superio_device = FU_SUPERIO_DEVICE_CLASS (klass);
+	klass_superio_device->setup = fu_superio_it85_device_setup;
+}
diff --git a/plugins/superio/fu-superio-it85-device.h b/plugins/superio/fu-superio-it85-device.h
new file mode 100644
index 000000000..36443a8ad
--- /dev/null
+++ b/plugins/superio/fu-superio-it85-device.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2018-2019 Richard Hughes <richard@hughsie.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+#pragma once
+
+#include "fu-superio-device.h"
+
+G_BEGIN_DECLS
+
+#define FU_TYPE_SUPERIO_IT85_DEVICE (fu_superio_it85_device_get_type ())
+G_DECLARE_FINAL_TYPE (FuSuperioIt85Device, fu_superio_it85_device, FU, SUPERIO_IT85_DEVICE, FuSuperioDevice)
+
+G_END_DECLS
diff --git a/plugins/superio/meson.build b/plugins/superio/meson.build
index 06b094342..1c424aad7 100644
--- a/plugins/superio/meson.build
+++ b/plugins/superio/meson.build
@@ -9,6 +9,7 @@ shared_module('fu_plugin_superio',
   sources : [
     'fu-plugin-superio.c',
     'fu-superio-device.c',
+    'fu-superio-it85-device.c',
     'fu-superio-common.c',
   ],
   include_directories : [