diff --git a/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.c b/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.c
index 00be73e..c63dd02 100644
--- a/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.c
+++ b/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.c
@@ -58,7 +58,7 @@ CFATTACH_DECL_NEW(sbusfpga_stat, sizeof(struct sbusfpga_sbus_bus_stat_softc),
 
 dev_type_open(sbusfpga_stat_open);
 dev_type_close(sbusfpga_stat_close);
-
+dev_type_ioctl(sbusfpga_stat_ioctl);
 
 
 const struct cdevsw sbusfpga_stat_cdevsw = {
@@ -66,7 +66,7 @@ const struct cdevsw sbusfpga_stat_cdevsw = {
 	.d_close = sbusfpga_stat_close,
 	.d_read = noread,
 	.d_write = nowrite,
-	.d_ioctl = noioctl,
+	.d_ioctl = sbusfpga_stat_ioctl,
 	.d_stop = nostop,
 	.d_tty = notty,
 	.d_poll = nopoll,
@@ -187,9 +187,42 @@ sbusfpga_stat_attach(device_t parent, device_t self, void *aux)
 
 	callout_init(&sc->sc_display, CALLOUT_MPSAFE);
 	callout_setfunc(&sc->sc_display, sbusfpga_stat_display, sc);
+	/* disable by default */
+	sc->sc_enable = 0;
+	/* do it once during boot*/
 	callout_schedule(&sc->sc_display, sc->sc_delay);
 }
 
+#define SBUSFPGA_STAT_ON    _IO(0, 1)
+#define SBUSFPGA_STAT_OFF   _IO(0, 0)
+
+int
+sbusfpga_stat_ioctl (dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
+{
+	struct sbusfpga_sbus_bus_stat_softc *sc = device_lookup_private(&sbusfpga_stat_cd, minor(dev));
+	int err = 0;
+
+	switch (cmd) {
+	case SBUSFPGA_STAT_ON:
+		if (!sc->sc_enable) {
+			sc->sc_enable = 1;
+			callout_schedule(&sc->sc_display, sc->sc_delay);
+		}
+		break;
+	case SBUSFPGA_STAT_OFF:
+		if (sc->sc_enable) {
+			callout_stop(&sc->sc_display);
+			sc->sc_enable = 0;
+		}
+		break;
+	default:
+		err = ENOTTY;
+		break;
+	}
+	
+	return err;
+}
+
 static void sbusfpga_stat_display(void *args) {
 	struct sbusfpga_sbus_bus_stat_softc *sc = args;
 	unsigned int c = sbus_bus_stat_stat_cycle_counter_read(sc), c2;
@@ -219,5 +252,6 @@ static void sbusfpga_stat_display(void *args) {
 					  sbus_bus_stat_sbus_master_error_virtual_read(sc));
 	}
 	sbus_bus_stat_stat_ctrl_write(sc, 0);
-	callout_schedule(&sc->sc_display, sc->sc_delay);
+	if (sc->sc_enable)
+		callout_schedule(&sc->sc_display, sc->sc_delay);
 }
diff --git a/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.h b/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.h
index 2ab4c48..1a6699f 100644
--- a/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.h
+++ b/NetBSD/9.0/usr/src/sys/dev/sbus/sbusfpga_stat.h
@@ -39,6 +39,7 @@ struct sbusfpga_sbus_bus_stat_softc {
 	int	sc_bufsiz;		/* Size of buffer */
 	callout_t		 sc_display;
 	int sc_delay;
+	int sc_enable;
 };
 
 #endif /* _SBUSFPGA_STAT_H_ */
diff --git a/sbus-to-ztex-gateware-migen/sbusfpga_stat_ctl.c b/sbus-to-ztex-gateware-migen/sbusfpga_stat_ctl.c
new file mode 100644
index 0000000..fe9d08b
--- /dev/null
+++ b/sbus-to-ztex-gateware-migen/sbusfpga_stat_ctl.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/ioccom.h>
+#include <errno.h>
+
+#define SBUSFPGA_STAT_ON    _IO(0, 1)
+#define SBUSFPGA_STAT_OFF   _IO(0, 0)
+
+int main(int argc, char **argv) {
+	const char const * device = "/dev/sbusfpga_stat0";
+	int devfd;
+	int onoff;
+
+	if (argc != 2) {
+		fprintf(stderr, "Usage: %s on|off\n", argv[0]);
+		return -1;
+	}
+
+	if (strncmp("on", argv[1], 2) == 0) {
+		onoff = 1;
+	} else if (strncmp("off", argv[1], 3) == 0) {
+		onoff = 0;
+	} else {
+		fprintf(stderr, "Usage: %s on|off\n", argv[0]);
+		return -1;
+	}
+	
+	if ( (devfd = open(device, O_RDWR)) == -1) {
+		perror("can't open device file");
+		return -1;
+	}
+
+	switch (onoff) {
+	case 0:
+		if (ioctl(devfd, SBUSFPGA_STAT_OFF, NULL)) {
+			perror("Turning statistics off failed.");
+			close(devfd);
+			return -1;
+		}
+		break;
+	case 1:
+		if (ioctl(devfd, SBUSFPGA_STAT_ON, NULL)) {
+			perror("Turning statistics on failed.");
+			close(devfd);
+			return -1;
+		}
+		break;
+	}
+
+	return 0;
+}