diff --git a/[refs] b/[refs]
index 1a579a52456b..75e254026bc1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7981a35ed0f64ca49b1a0c0acecbc9b644a8a2e3
+refs/heads/master: 881400a20c3551e90eed1062cf0387fa686a2fd0
diff --git a/trunk/drivers/ssb/main.c b/trunk/drivers/ssb/main.c
index bedb2b4ee9d2..72017bf2e577 100644
--- a/trunk/drivers/ssb/main.c
+++ b/trunk/drivers/ssb/main.c
@@ -1044,6 +1044,12 @@ int ssb_bus_may_powerdown(struct ssb_bus *bus)
 		goto out;
 
 	cc = &bus->chipco;
+
+	if (!cc->dev)
+		goto out;
+	if (cc->dev->id.revision < 5)
+		goto out;
+
 	ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
 	err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
 	if (err)