diff --git a/arch/arm/mach-bcm283x/include/mach/gpio.h b/arch/arm/mach-bcm283x/include/mach/gpio.h
index e6e5d16..b2df75a 100644
--- a/arch/arm/mach-bcm283x/include/mach/gpio.h
+++ b/arch/arm/mach-bcm283x/include/mach/gpio.h
@@ -66,4 +66,6 @@
 	unsigned long base;
 };
 
+int bcm2835_gpio_get_func_id(struct udevice *dev, unsigned gpio);
+
 #endif /* _BCM2835_GPIO_H_ */