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arm64: dts: meson: remove CPU opps below 1GHz for SM1 boards

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[ Upstream commit fd86d85401c2049f652293877c0f7e6e5afc3bbc ]

Amlogic SM1 devices experience CPU stalls and random board wedges when
the system idles and CPU cores clock down to lower opp points. Recent
vendor kernels include a change to remove 100-250MHz and other distro
sources also remove the 500/667MHz points. Unless all 100-667Mhz opps
are removed or the CPU governor forced to performance stalls are still
observed, so let's remove them to improve stability and uptime.

Fixes: 3d9e76483049 ("arm64: dts: meson-sm1-sei610: enable DVFS")
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220210100638.19130-3-christianshewitt@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christian Hewitt 2022-02-10 10:06:38 +00:00 committed by Greg Kroah-Hartman
parent 9f878775fc
commit d583cd6afc
1 changed files with 0 additions and 20 deletions
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20
arch/arm64/boot/dts/amlogic/meson-sm1.dtsi
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@ -95,26 +95,6 @@
compatible = "operating-points-v2";
opp-shared;
opp-100000000 {
opp-hz = /bits/ 64 <100000000>;
opp-microvolt = <730000>;
};
opp-250000000 {
opp-hz = /bits/ 64 <250000000>;
opp-microvolt = <730000>;
};
opp-500000000 {
opp-hz = /bits/ 64 <500000000>;
opp-microvolt = <730000>;
};
opp-667000000 {
opp-hz = /bits/ 64 <666666666>;
opp-microvolt = <750000>;
};
opp-1000000000 {
opp-hz = /bits/ 64 <1000000000>;
opp-microvolt = <770000>;