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mt7622: remove 300 MHz from dts

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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>
This commit is contained in:
John Audia
2022-07-06 11:49:50 -04:00
committed by Christian Marangi
parent 79af0593a3
commit d0d6b8e183
1 changed files with 25 additions and 0 deletions
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25
target/linux/mediatek/patches-5.15/722-remove-300Hz-to-prevent-freeze.patch Normal file
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@@ -0,0 +1,25 @@
--- 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>;