From 8ccd657629a086d3fb6520a6b91712b1ed0810b7 Mon Sep 17 00:00:00 2001 From: John Audia 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 Tested-by: Rui Salvaterra Tested-by: John Audia (cherry picked from commit d0d6b8e1833c587d0c50cac4f6324aa93b0bc8fc) [ fix the conflict by apply the patch to kernel 5.10 ] Signed-off-by: Christian Marangi --- .../722-remove-300Hz-to-prevent-freeze.patch | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 target/linux/mediatek/patches-5.10/722-remove-300Hz-to-prevent-freeze.patch diff --git a/target/linux/mediatek/patches-5.10/722-remove-300Hz-to-prevent-freeze.patch b/target/linux/mediatek/patches-5.10/722-remove-300Hz-to-prevent-freeze.patch new file mode 100644 index 0000000000..52069496ca --- /dev/null +++ b/target/linux/mediatek/patches-5.10/722-remove-300Hz-to-prevent-freeze.patch @@ -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>; -- 2.30.2