diff --git a/arch/arm/boot/dts/rk3188-mmc.dtsi b/arch/arm/boot/dts/rk3188-mmc.dtsi
index 27c861ae2cc0..0700d58d21c1 100755
--- a/arch/arm/boot/dts/rk3188-mmc.dtsi
+++ b/arch/arm/boot/dts/rk3188-mmc.dtsi
@@ -29,7 +29,7 @@
 		pinctrl-1 = <&sd0_cd_gpio>; //for int gpio?
 	    clocks = <&clk_gates2 11>;
             clock-frequency = <50000000>;
-            clock-freq-min-max = <400000 50000000>;	    
+            clock-freq-min-max = <200000 50000000>;	    
 
    	    num-slots = <1>;
 	    supports-highspeed;
@@ -61,7 +61,7 @@
 		
             clocks = <&clk_gates2 14>;
             clock-frequency = <50000000>;
-            clock-freq-min-max = <400000 50000000>;
+            clock-freq-min-max = <200000 50000000>;
             
             num-slots = <1>;
 	    supports-highspeed;