Link: https://git.alpinelinux.org/aports/tree/testing/linux-elm?h=master

--- a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi	2021-01-03 10:20:26.482347785 +0000
+++ b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi	2021-01-03 11:36:43.321775391 +0000
@@ -437,7 +437,7 @@
 	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0>;
-		spi-max-frequency = <50000000>;
+		spi-max-frequency = <109200000>;
 	};
 };