From d0d6b8e1833c587d0c50cac4f6324aa93b0bc8fc Mon Sep 17 00:00:00 2001
From: John Audia <therealgraysky@proton.me>
Date: Wed, 6 Jul 2022 11:49:50 -0400
Subject: [PATCH] mt7622: remove 300 MHz from dts

Due to the bug described here[1], remove the 300 MHz clock to avoid a low
voltage condition that can cause a hang when rebooting the RT3200/E8450.

This solution is probably better than the script-based work-around[2].

1. https://forum.openwrt.org/t/belkin-rt3200-linksys-e8450-wifi-ax-discussion/94302/1490
2. https://github.com/openwrt/openwrt/pull/5025

Signed-off-by: John Audia <therealgraysky@proton.me>
Tested-by: Rui Salvaterra <rsalvaterra@gmail.com>
Tested-by: John Audia <therealgraysky@proton.me>
---
--- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
@@ -23,11 +23,17 @@
 	cpu_opp_table: opp-table {
 		compatible = "operating-points-v2";
 		opp-shared;
-		opp-300000000 {
-			opp-hz = /bits/ 64 <300000000>;
-			opp-microvolt = <950000>;
-		};
-
+		/* Due to the bug described at the link below, remove the 300 MHz clock to avoid a low
+		 * voltage condition that can cause a hang when rebooting the RT3200/E8450.
+		 *
+		 * https://forum.openwrt.org/t/belkin-rt3200-linksys-e8450-wifi-ax-discussion/94302/1490
+		 *
+		 * opp-300000000 {
+		 *	opp-hz = /bits/ 64 <300000000>;
+		 *	opp-microvolt = <950000>;
+		 * };
+		 *
+		 */
 		opp-437500000 {
 			opp-hz = /bits/ 64 <437500000>;
 			opp-microvolt = <1000000>;
