diff --git a/include/drivers/clk.h b/include/drivers/clk.h
index d4cc90d..4db20f8 100644
--- a/include/drivers/clk.h
+++ b/include/drivers/clk.h
@@ -13,6 +13,8 @@
 	int (*enable)(unsigned long id);
 	void (*disable)(unsigned long id);
 	unsigned long (*get_rate)(unsigned long id);
+	int (*set_rate)(unsigned long id, unsigned long rate,
+			unsigned long *orate);
 	int (*get_parent)(unsigned long id);
 	int (*set_parent)(unsigned long id, unsigned long parent_id);
 	bool (*is_enabled)(unsigned long id);
@@ -21,6 +23,7 @@
 int clk_enable(unsigned long id);
 void clk_disable(unsigned long id);
 unsigned long clk_get_rate(unsigned long id);
+int clk_set_rate(unsigned long id, unsigned long rate, unsigned long *orate);
 bool clk_is_enabled(unsigned long id);
 int clk_get_parent(unsigned long id);
 int clk_set_parent(unsigned long id, unsigned long parent_id);