diff --git a/kernel/arch/arm64/boot/dts/rockchip/px30.dtsi b/kernel/arch/arm64/boot/dts/rockchip/px30.dtsi
index 24004e5f7..050e99e69 100755
--- a/kernel/arch/arm64/boot/dts/rockchip/px30.dtsi
+++ b/kernel/arch/arm64/boot/dts/rockchip/px30.dtsi
@@ -1410,7 +1410,7 @@
 	emmc: dwmmc@ff390000 {
 		compatible = "rockchip,px30-dw-mshc", "rockchip,rk3288-dw-mshc";
 		reg = <0x0 0xff390000 0x0 0x4000>;
-		max-frequency = <150000000>;
+		max-frequency = <50000000>;
 		clocks = <&cru HCLK_EMMC>, <&cru SCLK_EMMC>,
 			 <&cru SCLK_EMMC_DRV>, <&cru SCLK_EMMC_SAMPLE>;
 		clock-names = "biu", "ciu", "ciu-drv", "ciu-sample";
diff --git a/u-boot/arch/arm/dts/px30.dtsi b/u-boot/arch/arm/dts/px30.dtsi
index 5785dede4..168c93ccc 100644
--- a/u-boot/arch/arm/dts/px30.dtsi
+++ b/u-boot/arch/arm/dts/px30.dtsi
@@ -877,7 +877,7 @@
 	emmc: dwmmc@ff390000 {
 		compatible = "rockchip,px30-dw-mshc", "rockchip,rk3288-dw-mshc";
 		reg = <0x0 0xff390000 0x0 0x4000>;
-		max-frequency = <120000000>;
+		max-frequency = <50000000>;
 		clocks = <&cru HCLK_EMMC>, <&cru SCLK_EMMC>,
 			 <&cru SCLK_EMMC_DRV>, <&cru SCLK_EMMC_SAMPLE>;
 		clock-names = "biu", "ciu", "ciu-drv", "ciu-sample";