diff --git a/sys/conf/files b/sys/conf/files
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -2579,6 +2579,7 @@
 dev/ofw/ofw_bus_subr.c		optional fdt
 dev/ofw/ofw_cpu.c		optional fdt
 dev/ofw/ofw_fdt.c		optional fdt
+dev/ofw/ofw_firmware.c		optional fdt
 dev/ofw/ofw_if.m		optional fdt
 dev/ofw/ofw_graph.c		optional fdt
 dev/ofw/ofw_subr.c		optional fdt
diff --git a/sys/dev/ofw/ofw_firmware.c b/sys/dev/ofw/ofw_firmware.c
new file mode 100644
--- /dev/null
+++ b/sys/dev/ofw/ofw_firmware.c
@@ -0,0 +1,161 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2022 Beckhoff Automation GmbH & Co. KG
+ *
+ * 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/cdefs.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/bus.h>
+#include <sys/cpu.h>
+#include <machine/bus.h>
+
+#include <dev/fdt/simplebus.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+struct ofw_firmware_softc {
+	struct simplebus_softc	sc;
+	device_t		dev;
+};
+
+static struct simplebus_devinfo *
+ofw_firmware_setup_dinfo(device_t dev, phandle_t node,
+    struct simplebus_devinfo *di)
+{
+	struct simplebus_softc *sc;
+	struct simplebus_devinfo *ndi;
+
+	sc = device_get_softc(dev);
+	if (di == NULL)
+		ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO);
+	else
+		ndi = di;
+	if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) {
+		if (di == NULL)
+			free(ndi, M_DEVBUF);
+		return (NULL);
+	}
+
+	/* reg resources is from the parent but interrupts is on the node itself */
+	resource_list_init(&ndi->rl);
+	ofw_bus_reg_to_rl(dev, OF_parent(node), sc->acells, sc->scells, &ndi->rl);
+	ofw_bus_intr_to_rl(dev, node, &ndi->rl, NULL);
+
+	return (ndi);
+}
+
+static device_t
+ofw_firmware_add_device(device_t dev, phandle_t node, u_int order,
+    const char *name, int unit, struct simplebus_devinfo *di)
+{
+	struct simplebus_devinfo *ndi;
+	device_t cdev;
+
+	if ((ndi = ofw_firmware_setup_dinfo(dev, node, di)) == NULL)
+		return (NULL);
+	cdev = device_add_child_ordered(dev, order, name, unit);
+	if (cdev == NULL) {
+		device_printf(dev, "<%s>: device_add_child failed\n",
+		    ndi->obdinfo.obd_name);
+		resource_list_free(&ndi->rl);
+		ofw_bus_gen_destroy_devinfo(&ndi->obdinfo);
+		if (di == NULL)
+			free(ndi, M_DEVBUF);
+		return (NULL);
+	}
+	device_set_ivars(cdev, ndi);
+
+	return(cdev);
+}
+
+static int
+ofw_firmware_probe(device_t dev)
+{
+	const char *name;
+
+	name = ofw_bus_get_name(dev);
+	if (name == NULL || strcmp(name, "firmware") != 0)
+		return (ENXIO);
+
+	device_set_desc(dev, "OFW Firmware Group");
+	return (0);
+}
+
+static int
+ofw_firmware_attach(device_t dev)
+{
+	struct ofw_firmware_softc *sc;
+	phandle_t node, child;
+	device_t cdev;
+
+	sc = device_get_softc(dev);
+	sc->dev = dev;
+	node = ofw_bus_get_node(dev);
+
+	if (OF_getencprop(node, "#address-cells", &sc->sc.acells,
+	    sizeof(sc->sc.acells)) == -1) {
+		if (OF_getencprop(OF_parent(node), "#address-cells", &sc->sc.acells,
+		    sizeof(sc->sc.acells)) == -1) {
+			sc->sc.acells = 2;
+		}
+	}
+	if (OF_getencprop(node, "#size-cells", &sc->sc.scells,
+	    sizeof(sc->sc.scells)) == -1) {
+		if (OF_getencprop(OF_parent(node), "#size-cells", &sc->sc.scells,
+		    sizeof(sc->sc.scells)) == -1) {
+			sc->sc.scells = 1;
+		}
+	}
+
+	for (child = OF_child(node); child != 0; child = OF_peer(child)) {
+		cdev = ofw_firmware_add_device(dev, child, 0, NULL, -1, NULL);
+		if (cdev != NULL)
+			device_probe_and_attach(cdev);
+	}
+
+	return (bus_generic_attach(dev));
+}
+
+static device_method_t ofw_firmware_methods[] = {
+	/* device_if */
+	DEVMETHOD(device_probe, 	ofw_firmware_probe),
+	DEVMETHOD(device_attach, 	ofw_firmware_attach),
+
+	DEVMETHOD_END
+};
+
+DEFINE_CLASS_1(ofw_firmware, ofw_firmware_driver, ofw_firmware_methods,
+  sizeof(struct ofw_firmware_softc), simplebus_driver);
+
+EARLY_DRIVER_MODULE(ofw_firmware, simplebus, ofw_firmware_driver, 0, 0,
+    BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
+MODULE_VERSION(ofw_firmware, 1);