diff -u dev/spibus/spibus.c.orig dev/spibus/spibus.c
--- dev/spibus/spibus.c.orig	2012-09-12 15:40:52.302154640 -0300
+++ dev/spibus/spibus.c	2012-09-12 14:30:34.418155000 -0300
@@ -220,6 +220,24 @@
 	return (SPIBUS_TRANSFER(device_get_parent(dev), child, cmd));
 }
 
+static int
+spibus_get_config_impl(device_t dev, struct spi_config *cfg)
+{
+	struct spibus_softc *sc = SPIBUS_SOFTC(dev);
+
+	KASSERT(sc->sc_owner != NULL, ("SPI get config on unowned bus"));
+	return (SPIBUS_GET_CONFIG(device_get_parent(dev), cfg));
+}
+
+static int
+spibus_set_config_impl(device_t dev, struct spi_config *cfg)
+{
+	struct spibus_softc *sc = SPIBUS_SOFTC(dev);
+
+	KASSERT(sc->sc_owner != NULL, ("SPI set config on unowned bus"));
+	return (SPIBUS_SET_CONFIG(device_get_parent(dev), cfg));
+}
+
 static device_method_t spibus_methods[] = {
 	/* Device interface */
 	DEVMETHOD(device_probe,		spibus_probe),
@@ -242,6 +260,8 @@
 	DEVMETHOD(spibus_acquire_bus,	spibus_acquire_bus_impl),
 	DEVMETHOD(spibus_release_bus,	spibus_release_bus_impl),
 	DEVMETHOD(spibus_transfer,	spibus_transfer_impl),
+	DEVMETHOD(spibus_get_config,	spibus_get_config_impl),
+	DEVMETHOD(spibus_set_config,	spibus_set_config_impl),
 
 	DEVMETHOD_END
 };
diff -u dev/spibus/spibus_if.m.orig dev/spibus.final/spibus_if.m
--- dev/spibus/spibus_if.m.orig	2012-09-12 15:40:03.005153883 -0300
+++ dev/spibus/spibus_if.m	2012-09-12 11:34:46.793475000 -0300
@@ -44,6 +44,21 @@
 	null_release_bus(device_t dev, device_t child)
 	{
 	}
+
+	static int
+	null_get_config(device_t dev, struct spi_config *cfg)
+	{
+
+		cfg->clock_hz = 0;
+		return (0);
+	}
+
+	static int
+	null_set_config(device_t dev, struct spi_config *cfg)
+	{
+
+		return (0);
+	}
 };
 
 #
@@ -70,3 +85,19 @@
 	device_t child;
 	struct spi_command *cmd;
 };
+
+#
+# Get the spibus configuration
+#
+METHOD int get_config {
+	device_t dev;
+	struct spi_config *cfg;
+} DEFAULT null_get_config;
+
+#
+# Set the spibus configuration
+#
+METHOD int set_config {
+	device_t dev;
+	struct spi_config *cfg;
+} DEFAULT null_set_config;
Index: dev/spibus/spi.h
===================================================================
--- dev/spibus/spi.h	(revision 240418)
+++ dev/spibus/spi.h	(working copy)
@@ -11,4 +11,9 @@
 	uint32_t rx_data_sz;
 };
 
+struct spi_config {
+	unsigned int clock_hz;  /* Sending a 0 to spibus_set_config requests
+				   the maximum possible frequency. */
+};
+
 #define	SPI_CHIP_SELECT_HIGH	0x1		/* Chip select high (else low) */