diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c
index 127dc2e2e690..7025e6377c35 100644
--- a/drivers/regulator/rk808-regulator.c
+++ b/drivers/regulator/rk808-regulator.c
@@ -61,7 +61,7 @@
 #define RK808_SLP_SET_OFF_REG_OFFSET 2
 
 /* max steps for increase voltage of Buck1/2, equal 100mv*/
-#define MAX_STEPS_ONE_TIME 8
+#define MAX_STEPS_ONE_TIME 2
 
 #define ENABLE_MASK(id)			(BIT(id) | BIT(4 + (id)))
 #define DISABLE_VAL(id)			(BIT(4 + (id)))