diff --git a/debugcc.c b/debugcc.c
index b12d62a..80aa48c 100644
--- a/debugcc.c
+++ b/debugcc.c
@@ -195,7 +195,10 @@ static void measure(const struct measure_clk *clk)
 
 	mux_prepare_enable(clk->primary, clk->mux);
 
-	clk_rate = measure_default(clk);
+	if (clk->leaf && clk->leaf->measure)
+		clk_rate = clk->leaf->measure(clk);
+	else
+		clk_rate = measure_default(clk);
 
 	mux_disable(clk->primary);
 
diff --git a/debugcc.h b/debugcc.h
index 61b11cc..e9f27f4 100644
--- a/debugcc.h
+++ b/debugcc.h
@@ -35,6 +35,8 @@
 
 #define CORE_CC_BLOCK "core"
 
+struct measure_clk;
+
 struct debug_mux {
 	unsigned long phys;
 	void *base;
@@ -61,6 +63,7 @@ struct debug_mux {
 	unsigned int ahb_mask;
 
 	void (*premeasure)(struct debug_mux *mux);
+	unsigned long (*measure)(const struct measure_clk *clk);
 	void (*postmeasure)(struct debug_mux *mux);
 };