From: Christian Hewitt <christianshewitt@gmail.com>

Date: Thu, 19 Jan 2023 05:30:31 +0000

Subject: [PATCH] arm64: dts: meson: remove CPU opps below 1GHz for G12A boards

References: bsc#1012628

Patch-mainline: 6.2.3

Git-commit: 3cbd431c2b34d84605d358c8c57654193fd661fb

[ Upstream commit 3cbd431c2b34d84605d358c8c57654193fd661fb ]

Amlogic G12A 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: b190056fa9ee ("arm64: dts: meson-g12a: add cpus OPP table")

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>

Link: https://lore.kernel.org/r/20230119053031.21400-1-christianshewitt@gmail.com

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

Signed-off-by: Sasha Levin <sashal@kernel.org>

Signed-off-by: Jiri Slaby <jslaby@suse.cz>

---

 arch/arm64/boot/dts/amlogic/meson-g12a.dtsi | 20 --------------------

 1 file changed, 20 deletions(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi

index 7677764e..f58fd2a6 100644

--- a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi

+++ b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi

@@ -58,26 +58,6 @@ cpu_opp_table: opp-table {

 		compatible = "operating-points-v2";

 		opp-shared;

-		opp-100000000 {

-			opp-hz = /bits/ 64 <100000000>;

-			opp-microvolt = <731000>;

-		};

-

-		opp-250000000 {

-			opp-hz = /bits/ 64 <250000000>;

-			opp-microvolt = <731000>;

-		};

-

-		opp-500000000 {

-			opp-hz = /bits/ 64 <500000000>;

-			opp-microvolt = <731000>;

-		};

-

-		opp-667000000 {

-			opp-hz = /bits/ 64 <666666666>;

-			opp-microvolt = <731000>;

-		};

-

 		opp-1000000000 {

 			opp-hz = /bits/ 64 <1000000000>;

 			opp-microvolt = <731000>;

-- 

2.35.3