[PATCH v2 1/2] arm64: dts: meson: remove CPU opps below 1GHz for G12B boards

[Neil Armstrong]

On 10/02/2022 11:06, Christian Hewitt wrote:
> Amlogic G12B 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: b96d4e92709b ("arm64: dts: meson-g12b: support a311d and s922x cpu operating points")
> Signed-off-by: Christian Hewitt <christianshewitt at gmail.com>
> ---
>   .../boot/dts/amlogic/meson-g12b-a311d.dtsi    | 40 -------------------
>   .../boot/dts/amlogic/meson-g12b-s922x.dtsi    | 40 -------------------
>   2 files changed, 80 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi
> index d61f43052a34..8e9ad1e51d66 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-a311d.dtsi
> @@ -11,26 +11,6 @@
>   		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 <667000000>;
> -			opp-microvolt = <731000>;
> -		};
> -
>   		opp-1000000000 {
>   			opp-hz = /bits/ 64 <1000000000>;
>   			opp-microvolt = <761000>;
> @@ -71,26 +51,6 @@
>   		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 <667000000>;
> -			opp-microvolt = <731000>;
> -		};
> -
>   		opp-1000000000 {
>   			opp-hz = /bits/ 64 <1000000000>;
>   			opp-microvolt = <731000>;
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi
> index 1e5d0ee5d541..44c23c984034 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-s922x.dtsi
> @@ -11,26 +11,6 @@
>   		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 <667000000>;
> -			opp-microvolt = <731000>;
> -		};
> -
>   		opp-1000000000 {
>   			opp-hz = /bits/ 64 <1000000000>;
>   			opp-microvolt = <731000>;
> @@ -76,26 +56,6 @@
>   		compatible = "operating-points-v2";
>   		opp-shared;
>   
> -		opp-100000000 {
> -			opp-hz = /bits/ 64 <100000000>;
> -			opp-microvolt = <751000>;
> -		};
> -
> -		opp-250000000 {
> -			opp-hz = /bits/ 64 <250000000>;
> -			opp-microvolt = <751000>;
> -		};
> -
> -		opp-500000000 {
> -			opp-hz = /bits/ 64 <500000000>;
> -			opp-microvolt = <751000>;
> -		};
> -
> -		opp-667000000 {
> -			opp-hz = /bits/ 64 <667000000>;
> -			opp-microvolt = <751000>;
> -		};
> -
>   		opp-1000000000 {
>   			opp-hz = /bits/ 64 <1000000000>;
>   			opp-microvolt = <771000>;

Reviewed-by: Neil Armstrong <narmstrong at baylibre.com>