diff --git a/drivers/video/backlight/rk2818_backlight.c b/drivers/video/backlight/rk2818_backlight.c
index 0f0062fc1ec6..8ece2ec20183 100644
--- a/drivers/video/backlight/rk2818_backlight.c
+++ b/drivers/video/backlight/rk2818_backlight.c
@@ -311,6 +311,11 @@ static int rk2818_backlight_probe(struct platform_device *pdev)
 
     rk2818_mux_api_set(pwm_iomux[id], 1);
 
+    if(rk2818_bl_info->pw_iomux)
+    {
+        rk2818_mux_api_set(rk2818_bl_info->pw_iomux, 0); 
+    }
+
     ret = gpio_request(pin, NULL); 
     if(ret != 0)
     {