Index: sys/dev/smbus/smbus.c
===================================================================
--- sys/dev/smbus/smbus.c
+++ sys/dev/smbus/smbus.c
@@ -33,11 +33,15 @@
 #include <sys/lock.h>
 #include <sys/module.h>
 #include <sys/mutex.h>
-#include <sys/bus.h> 
+#include <sys/bus.h>
 
 #include <dev/smbus/smbconf.h>
 #include <dev/smbus/smbus.h>
 
+#include "smbus_if.h"
+#include "bus_if.h"
+
+
 /*
  * Autoconfiguration and support routines for System Management bus
  */
@@ -49,6 +53,13 @@
 static int smbus_attach(device_t);
 static int smbus_detach(device_t);
 
+static int smbus_child_location_str(device_t parent, device_t child,
+		    char *buf, size_t buflen);
+static int smbus_print_child(device_t parent, device_t child);
+static void smbus_probe_device(device_t dev, u_char* addr);
+static int smbus_read_ivar(device_t parent, device_t child, int which,
+		    uintptr_t *result);
+
 static device_method_t smbus_methods[] = {
         /* device interface */
         DEVMETHOD(device_probe,         smbus_probe),
@@ -57,6 +68,10 @@
 
 	/* bus interface */
 	DEVMETHOD(bus_add_child,	bus_generic_add_child),
+	DEVMETHOD(bus_child_location_str, smbus_child_location_str),
+	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
+	DEVMETHOD(bus_print_child,	smbus_print_child),
+	DEVMETHOD(bus_read_ivar,	smbus_read_ivar),
 
 	DEVMETHOD_END
 };
@@ -87,9 +102,15 @@
 smbus_attach(device_t dev)
 {
 	struct smbus_softc *sc = device_get_softc(dev);
+	unsigned char addr;
 
 	mtx_init(&sc->lock, device_get_nameunit(dev), "smbus", MTX_DEF);
+
 	bus_generic_probe(dev);
+	for (addr = SMBUS_ADDR_MIN; addr < SMBUS_ADDR_MAX; ++addr) {
+		sc->addrs[addr] = addr;
+		smbus_probe_device(dev, &sc->addrs[addr]);
+	}
 	bus_generic_attach(dev);
 
 	return (0);
@@ -114,4 +135,69 @@
 {
 }
 
+static void
+smbus_probe_device(device_t dev, u_char* addr)
+{
+	device_t child;
+	int error;
+	u_char cmd;
+	u_char buf[2];
+
+	cmd = 0x01;
+	error = smbus_trans(dev, *addr, cmd,
+			    SMB_TRANS_NOCNT | SMB_TRANS_NOREPORT,
+			    NULL, 0, buf, 1, NULL);
+	if (error == 0) {
+		device_printf(dev, "Probed address 0x%02x\n", *addr);
+		child = device_add_child(dev, NULL, -1);
+		device_set_ivars(child, addr);
+	}
+}
+
+static int
+smbus_child_location_str(device_t parent, device_t child, char *buf,
+    size_t buflen)
+{
+	unsigned char *addr;
+
+	addr = device_get_ivars(child);
+	if (addr)
+		snprintf(buf, buflen, "addr=0x%x", *addr);
+	else if (buflen)
+		buf[0] = 0;
+	return (0);
+}
+
+static int
+smbus_print_child(device_t parent, device_t child)
+{
+	unsigned char *addr;
+	int retval;
+
+	addr = device_get_ivars(child);
+	retval = bus_print_child_header(parent, child);
+	if (addr)
+		retval += printf(" at addr 0x%x", *addr);
+	retval += bus_print_child_footer(parent, child);
+
+	return (retval);
+}
+
+static int
+smbus_read_ivar(device_t parent, device_t child, int which,
+    uintptr_t *result)
+{
+	unsigned char *addr;
+
+	addr = device_get_ivars(child);
+	switch (which) {
+	case SMBUS_IVAR_ADDR:
+		*result = (addr == NULL) ? -1 : *addr;
+		break;
+	default:
+		return (ENOENT);
+	}
+	return (0);
+}
+
 MODULE_VERSION(smbus, SMBUS_MODVER);