diff --git a/sys/conf/files b/sys/conf/files
index f002598d1c3d..fb57567d3e87 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -1854,6 +1854,7 @@ dev/iicbus/mux/ltc430x.c	optional ltc430x
 dev/iicbus/mux/pca954x.c	optional pca954x
 dev/iicbus/nxprtc.c		optional nxprtc | pcf8563
 dev/iicbus/ofw_iicbus.c		optional fdt iicbus
+dev/iicbus/ofw_iicbus_if.m	optional fdt iicbus
 dev/iicbus/pcf8574.c		optional pcf8574
 dev/iicbus/pcf8591.c		optional pcf8591
 dev/iicbus/rtc8583.c		optional rtc8583
diff --git a/sys/dev/iicbus/ofw_iicbus.c b/sys/dev/iicbus/ofw_iicbus.c
index 9be05d73abde..2ccc9698e5bd 100644
--- a/sys/dev/iicbus/ofw_iicbus.c
+++ b/sys/dev/iicbus/ofw_iicbus.c
@@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
 #include <dev/ofw/openfirm.h>
 
 #include "iicbus_if.h"
+#include "ofw_iicbus_if.h"
 
 /* Methods */
 static device_probe_t ofw_iicbus_probe;
@@ -50,6 +51,8 @@ static device_t ofw_iicbus_add_child(device_t dev, u_int order,
     const char *name, int unit);
 static const struct ofw_bus_devinfo *ofw_iicbus_get_devinfo(device_t bus,
     device_t dev);
+static int ofw_iicbus_set_devinfo(device_t bus, device_t dev,
+    phandle_t ofw_node, char *ofw_name, char *ofw_compat, int i2c_addr);
 
 static device_method_t ofw_iicbus_methods[] = {
 	/* Device interface */
@@ -68,6 +71,9 @@ static device_method_t ofw_iicbus_methods[] = {
 	DEVMETHOD(ofw_bus_get_node,	ofw_bus_gen_get_node),
 	DEVMETHOD(ofw_bus_get_type,	ofw_bus_gen_get_type),
 
+	/* ofw_iicbus interface */
+	DEVMETHOD(ofw_iicbus_set_devinfo, ofw_iicbus_set_devinfo),
+
 	DEVMETHOD_END
 };
 
@@ -238,3 +244,26 @@ ofw_iicbus_get_devinfo(device_t bus, device_t dev)
 	dinfo = device_get_ivars(dev);
 	return (&dinfo->opd_obdinfo);
 }
+
+static int
+ofw_iicbus_set_devinfo(device_t bus, device_t dev, phandle_t ofw_node,
+    char *ofw_name, char *ofw_compat, int i2c_addr)
+{
+	struct ofw_iicbus_devinfo *devi;
+
+	/*
+	 * Setup OFW-related parts of the ivars for manually
+	 * created ofw_iicbus childern.
+	 */
+	devi = device_get_ivars(dev);
+	if (devi == NULL)
+		return (ENXIO);
+
+	devi->opd_obdinfo.obd_node = ofw_node;
+	if (ofw_name != NULL)
+		devi->opd_obdinfo.obd_name = strdup(ofw_name, M_OFWPROP);
+	if (ofw_compat != NULL)
+		devi->opd_obdinfo.obd_compat = strdup(ofw_compat, M_OFWPROP);
+	devi->opd_dinfo.addr = i2c_addr;
+	return (0);
+}
diff --git a/sys/dev/iicbus/ofw_iicbus_if.m b/sys/dev/iicbus/ofw_iicbus_if.m
new file mode 100644
index 000000000000..a2b0bd2761db
--- /dev/null
+++ b/sys/dev/iicbus/ofw_iicbus_if.m
@@ -0,0 +1,43 @@
+#-
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright 2020 Michal Meloun <mmel@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+#include <sys/bus.h>
+#include <dev/ofw/openfirm.h>
+
+INTERFACE ofw_iicbus;
+
+#
+# Interpret interrupt
+#
+METHOD int set_devinfo {
+	device_t bus;
+	device_t dev;
+	phandle_t ofw_node;
+	char *ofw_name;
+	char *ofw_compat;
+	int i2c_addr;
+};