diff --git a/include/linux/sh_pfc.h b/include/linux/sh_pfc.h
index 84538c4..5c15aed 100644
--- a/include/linux/sh_pfc.h
+++ b/include/linux/sh_pfc.h
@@ -116,6 +116,8 @@
 	unsigned int num_resources;
 	struct pfc_window *window;
 
+	unsigned long unlock_reg;
+
 	struct gpio_chip chip;
 };