--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi	2021-01-21 12:54:16.967891868 +0800
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi	2021-01-21 13:04:10.214771523 +0800
@@ -697,6 +697,7 @@
 };
 
 &sdhci {
+	max-frequency = <150000000>;
 	bus-width = <8>;
 	mmc-hs400-1_8v;
 	mmc-hs400-enhanced-strobe;