Index: sys/dev/acpica/acpi.c
===================================================================
--- sys/dev/acpica/acpi.c
+++ sys/dev/acpica/acpi.c
@@ -144,6 +144,8 @@
 		    int rid);
 static uint32_t	acpi_isa_get_logicalid(device_t dev);
 static int	acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
+static ssize_t acpi_bus_get_prop(device_t bus, device_t child, const char *propname,
+		    void *propvalue, size_t size);
 static int	acpi_device_id_probe(device_t bus, device_t dev, char **ids, char **match);
 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
 		    ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
@@ -223,6 +225,7 @@
     DEVMETHOD(bus_hint_device_unit,	acpi_hint_device_unit),
     DEVMETHOD(bus_get_cpus,		acpi_get_cpus),
     DEVMETHOD(bus_get_domain,		acpi_get_domain),
+    DEVMETHOD(bus_get_property,		acpi_bus_get_prop),
 
     /* ACPI bus */
     DEVMETHOD(acpi_id_probe,		acpi_device_id_probe),
@@ -1817,6 +1820,40 @@
 	return (AE_NOT_FOUND);
 }
 
+static ssize_t
+acpi_bus_get_prop(device_t bus, device_t child, const char *propname,
+    void *propvalue, size_t size)
+{
+	ACPI_STATUS status;
+	const ACPI_OBJECT *obj;
+
+	status = acpi_device_get_prop(bus, child, __DECONST(char *, propname),
+		&obj);
+	if (ACPI_FAILURE(status))
+		return (-1);
+
+	switch (obj->Type) {
+	case ACPI_TYPE_INTEGER:
+		if (propvalue != NULL && size >= sizeof(uint64_t))
+			*((uint64_t *) propvalue) = obj->Integer.Value;
+		return (sizeof(uint64_t));
+
+	case ACPI_TYPE_STRING:
+		if (propvalue != NULL && size > 0)
+			memcpy(propvalue, obj->String.Pointer,
+			    MIN(size, obj->String.Length));
+		return (obj->String.Length);
+
+	case ACPI_TYPE_BUFFER:
+		if (propvalue != NULL && size > 0)
+			memcpy(propvalue, obj->Buffer.Pointer,
+			    MIN(size, obj->Buffer.Length));
+		return (obj->Buffer.Length);
+	}
+
+	return (-1);
+}
+
 int
 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
 {
Index: sys/dev/fdt/simplebus.c
===================================================================
--- sys/dev/fdt/simplebus.c
+++ sys/dev/fdt/simplebus.c
@@ -54,6 +54,9 @@
     const char *name, int unit);
 static struct resource_list *simplebus_get_resource_list(device_t bus,
     device_t child);
+
+static ssize_t		simplebus_get_property(device_t bus, device_t child,
+    const char *propname, void *propvalue, size_t size);
 /*
  * ofw_bus interface
  */
@@ -89,6 +92,7 @@
 	DEVMETHOD(bus_get_resource,	bus_generic_rl_get_resource),
 	DEVMETHOD(bus_child_pnpinfo,	ofw_bus_gen_child_pnpinfo),
 	DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list),
+	DEVMETHOD(bus_get_property, simplebus_get_property),
 
 	/* ofw_bus interface */
 	DEVMETHOD(ofw_bus_get_devinfo,	simplebus_get_devinfo),
@@ -350,6 +354,18 @@
 	return (&ndi->rl);
 }
 
+static ssize_t
+simplebus_get_property(device_t bus, device_t child, const char *propname,
+    void *propvalue, size_t size)
+{
+	phandle_t node = ofw_bus_get_node(child);
+
+	if (propvalue == NULL || size == 0)
+		return (OF_getproplen(node, propname));
+
+	return (OF_getencprop(node, propname, propvalue, size));
+}
+
 static struct resource *
 simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
Index: sys/kern/bus_if.m
===================================================================
--- sys/kern/bus_if.m
+++ sys/kern/bus_if.m
@@ -88,6 +88,13 @@
 		*newstart = start;
 		return (0);
 	}
+
+	static ssize_t
+	null_get_property(device_t dev, device_t child, const char *propname,
+	    void *propvalue, size_t size)
+	{
+		return (-1);
+	}
 };
 
 /**
@@ -924,3 +931,27 @@
 	device_t _child;
 	int _flags;
 };
+
+/**
+ * @brief Gets child's specific property
+ *
+ * The bus_get_property can be used to access device
+ * specific properties stored on the bus. If _propvalue
+ * is NULL or _size is 0, then method only returns size
+ * of the property.
+ *
+ * @param _dev			the bus device
+ * @param _child		the child device
+ * @param _propname		property name
+ * @param _propvalue	property value destination
+ * @param _size			property value size
+ *
+ * @returns size of property if successful otherwise -1
+ */
+METHOD ssize_t get_property {
+	device_t _dev;
+	device_t _child;
+	const char *_propname;
+	void *_propvalue;
+	size_t _size;
+} DEFAULT null_get_property;
Index: sys/kern/subr_bus.c
===================================================================
--- sys/kern/subr_bus.c
+++ sys/kern/subr_bus.c
@@ -2708,6 +2708,14 @@
 	dev->flags &= ~DF_QUIET;
 }
 
+ssize_t
+device_get_property(device_t dev, const char *prop, void *val, size_t sz)
+{
+	device_t bus = device_get_parent(dev);
+
+	return (BUS_GET_PROPERTY(bus, dev, prop, val, sz));
+}
+
 /**
  * @brief Return non-zero if the DF_QUIET_CHIDLREN flag is set on the device
  */
Index: sys/sys/bus.h
===================================================================
--- sys/sys/bus.h
+++ sys/sys/bus.h
@@ -631,6 +631,13 @@
 int	device_shutdown(device_t dev);
 void	device_unbusy(device_t dev);
 void	device_verbose(device_t dev);
+ssize_t	device_get_property(device_t dev, const char *prop, void *val, size_t sz);
+
+static __inline bool
+device_has_property(device_t dev, const char *prop)
+{
+	return (device_get_property(dev, prop, NULL, 0) >= 0);
+}
 
 /*
  * Access functions for devclass.