build/patch/kernel/archive/rockchip64-5.14/board-rockpi4-FixMMCFreq.patch

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--- 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;