diff --git a/arch/sparc32/tree.fs b/arch/sparc32/tree.fs
index debc7da..40ae84f 100644
--- a/arch/sparc32/tree.fs
+++ b/arch/sparc32/tree.fs
@@ -117,13 +117,6 @@ new-device
   h# 26 encode-int 0 encode-int encode+ " intr" property
 finish-device
 
-" /iommu/sbus" find-device
-new-device
-  " power-management" device-name
-  h# 5 encode-int h# 0a000000 encode-int encode+ h# 00000010 encode-int encode+ " reg" property
-finish-device
-
-
 \ obio (on-board IO)
 " /" find-device
 new-device
diff --git a/drivers/sbus.c b/drivers/sbus.c
index 904b53c..ce9f5b1 100644
--- a/drivers/sbus.c
+++ b/drivers/sbus.c
@@ -20,6 +20,8 @@
 
 #define SBUS_REGS        0x28
 #define SBUS_SLOTS       16
+#define POWER_REGS       0x10
+#define POWER_OFFSET     0x0a000000
 
 static void
 ob_sbus_node_init(unsigned long bus, unsigned long base)
@@ -270,6 +272,30 @@ ob_tcx_init(unsigned int slot, unsigned long base)
     }
 }
 
+static void
+ob_power_init(unsigned int slot, unsigned long base)
+{
+    push_str("/iommu/sbus");
+    fword("find-device");
+    fword("new-device");
+
+    push_str("power-management");
+    fword("device-name");
+
+    PUSH(slot);
+    fword("encode-int");
+    PUSH(base);
+    fword("encode-int");
+    fword("encode+");
+    PUSH(POWER_REGS);
+    fword("encode-int");
+    fword("encode+");
+    push_str("reg");
+    fword("property");
+
+    fword("finish-device");
+}
+
 static void
 ob_macio_init(unsigned int slot, unsigned long base, unsigned long offset)
 {
@@ -289,7 +315,7 @@ ob_macio_init(unsigned int slot, unsigned long base, unsigned long offset)
     //ob_bpp_init(base);
 
     // Power management
-    //ob_power_init(base);
+    ob_power_init(slot, POWER_OFFSET);
 }
 
 static void