diff --git a/arch/arm/include/asm/arch-tegra124/clock.h b/arch/arm/include/asm/arch-tegra124/clock.h
index 8e39d21..8e65086 100644
--- a/arch/arm/include/asm/arch-tegra124/clock.h
+++ b/arch/arm/include/asm/arch-tegra124/clock.h
@@ -16,4 +16,6 @@
 #define OSC_FREQ_SHIFT          28
 #define OSC_FREQ_MASK           (0xF << OSC_FREQ_SHIFT)
 
+int tegra_plle_enable(void);
+
 #endif	/* _TEGRA124_CLOCK_H_ */
diff --git a/arch/arm/include/asm/arch-tegra20/clock.h b/arch/arm/include/asm/arch-tegra20/clock.h
index 889c65a..4df8da9 100644
--- a/arch/arm/include/asm/arch-tegra20/clock.h
+++ b/arch/arm/include/asm/arch-tegra20/clock.h
@@ -15,4 +15,6 @@
 #define OSC_FREQ_SHIFT          30
 #define OSC_FREQ_MASK           (3U << OSC_FREQ_SHIFT)
 
+int tegra_plle_enable(void);
+
 #endif	/* _TEGRA20_CLOCK_H */
diff --git a/arch/arm/include/asm/arch-tegra30/clock.h b/arch/arm/include/asm/arch-tegra30/clock.h
index 2f24a75..410c352 100644
--- a/arch/arm/include/asm/arch-tegra30/clock.h
+++ b/arch/arm/include/asm/arch-tegra30/clock.h
@@ -25,4 +25,6 @@
 #define OSC_FREQ_SHIFT          28
 #define OSC_FREQ_MASK           (0xF << OSC_FREQ_SHIFT)
 
+int tegra_plle_enable(void);
+
 #endif	/* _TEGRA30_CLOCK_H_ */