diff --git a/arch/arm/mach-rockchip/boot_mode.c b/arch/arm/mach-rockchip/boot_mode.c
index 942849f..d7dd425 100644
--- a/arch/arm/mach-rockchip/boot_mode.c
+++ b/arch/arm/mach-rockchip/boot_mode.c
@@ -9,6 +9,15 @@
 #include <asm/io.h>
 #include <asm/arch/boot_mode.h>
 
+#if (CONFIG_ROCKCHIP_BOOT_MODE_REG == 0)
+
+int setup_boot_mode(void)
+{
+	return 0;
+}
+
+#else
+
 void set_back_to_bootrom_dnl_flag(void)
 {
 	writel(BOOT_BROM_DOWNLOAD, CONFIG_ROCKCHIP_BOOT_MODE_REG);
@@ -74,3 +83,5 @@
 
 	return 0;
 }
+
+#endif