Re: [PATCH v3 7/8] arm64: dts: allwinner: h616: Add CPU OPPs table

["Jernej Škrabec" <jernej.skrabec@gmail.com>]

Dne torek, 26. marec 2024 ob 12:47:42 CET je Andre Przywara napisal(a):
> From: Martin Botka <martin.botka@somainline.org>
> 
> Add an Operating Performance Points table for the CPU cores to enable
> Dynamic Voltage & Frequency Scaling (DVFS) on the H616.
> The values were taken from the BSP sources. The (newer) H700 chips we
> have seen seem to use a separate speed bin, its OPP values were taken
> from a live system and added to the mix.
> 
> Also add the needed cpu_speed_grade nvmem cell and the cooling cells
> properties, to enable passive cooling.
> 
> Signed-off-by: Martin Botka <martin.botka@somainline.org>
> [Andre: rework to minimise opp-microvolt properties]
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
>  .../dts/allwinner/sun50i-h616-cpu-opp.dtsi    | 125 ++++++++++++++++++
>  .../arm64/boot/dts/allwinner/sun50i-h616.dtsi |   8 ++
>  2 files changed, 133 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi
> new file mode 100644
> index 0000000000000..6073fdf672592
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi
> @@ -0,0 +1,125 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +// Copyright (C) 2023 Martin Botka <martin@somainline.org>
> +
> +/ {
> +	cpu_opp_table: opp-table-cpu {
> +		compatible = "allwinner,sun50i-h616-operating-points";
> +		nvmem-cells = <&cpu_speed_grade>;
> +		opp-shared;
> +
> +		opp-480000000 {
> +			opp-hz = /bits/ 64 <480000000>;
> +			opp-microvolt = <900000>;

Ideally triplet of voltages should be specified, to support PMIC-less boards,
but that's unlikely to happen with these SoCs.

Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej

> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x3f>;
> +		};
> +
> +		opp-600000000 {
> +			opp-hz = /bits/ 64 <600000000>;
> +			opp-microvolt = <900000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x12>;
> +		};
> +
> +		opp-720000000 {
> +			opp-hz = /bits/ 64 <720000000>;
> +			opp-microvolt = <900000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x2d>;
> +		};
> +
> +		opp-792000000 {
> +			opp-hz = /bits/ 64 <792000000>;
> +			opp-microvolt-speed1 = <900000>;
> +			opp-microvolt-speed4 = <940000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x12>;
> +		};
> +
> +		opp-936000000 {
> +			opp-hz = /bits/ 64 <936000000>;
> +			opp-microvolt = <900000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x0d>;
> +		};
> +
> +		opp-1008000000 {
> +			opp-hz = /bits/ 64 <1008000000>;
> +			opp-microvolt-speed0 = <950000>;
> +			opp-microvolt-speed1 = <940000>;
> +			opp-microvolt-speed2 = <950000>;
> +			opp-microvolt-speed3 = <950000>;
> +			opp-microvolt-speed4 = <1020000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x1f>;
> +		};
> +
> +		opp-10320000 {
> +			opp-hz = /bits/ 64 <1032000000>;
> +			opp-microvolt = <900000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x20>;
> +		};
> +
> +		opp-1104000000 {
> +			opp-hz = /bits/ 64 <1104000000>;
> +			opp-microvolt-speed0 = <1000000>;
> +			opp-microvolt-speed2 = <1000000>;
> +			opp-microvolt-speed3 = <1000000>;
> +			opp-microvolt-speed5 = <950000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x2d>;
> +		};
> +
> +		opp-1200000000 {
> +			opp-hz = /bits/ 64 <1200000000>;
> +			opp-microvolt-speed0 = <1050000>;
> +			opp-microvolt-speed1 = <1020000>;
> +			opp-microvolt-speed2 = <1050000>;
> +			opp-microvolt-speed3 = <1050000>;
> +			opp-microvolt-speed4 = <1100000>;
> +			opp-microvolt-speed5 = <1020000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x3f>;
> +		};
> +
> +		opp-1320000000 {
> +			opp-hz = /bits/ 64 <1320000000>;
> +			opp-microvolt = <1100000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x1d>;
> +		};
> +
> +		opp-1416000000 {
> +			opp-hz = /bits/ 64 <1416000000>;
> +			opp-microvolt = <1100000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x2d>;
> +		};
> +
> +		opp-1512000000 {
> +			opp-hz = /bits/ 64 <1512000000>;
> +			opp-microvolt-speed1 = <1100000>;
> +			opp-microvolt-speed3 = <1100000>;
> +			opp-microvolt-speed5 = <1160000>;
> +			clock-latency-ns = <244144>; /* 8 32k periods */
> +			opp-supported-hw = <0x2a>;
> +		};
> +	};
> +};
> +
> +&cpu0 {
> +	operating-points-v2 = <&cpu_opp_table>;
> +};
> +
> +&cpu1 {
> +	operating-points-v2 = <&cpu_opp_table>;
> +};
> +
> +&cpu2 {
> +	operating-points-v2 = <&cpu_opp_table>;
> +};
> +
> +&cpu3 {
> +	operating-points-v2 = <&cpu_opp_table>;
> +};
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> index b2e85e52d1a12..c0fa466fa9f07 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h616.dtsi
> @@ -26,6 +26,7 @@ cpu0: cpu@0 {
>  			reg = <0>;
>  			enable-method = "psci";
>  			clocks = <&ccu CLK_CPUX>;
> +			#cooling-cells = <2>;
>  		};
>  
>  		cpu1: cpu@1 {
> @@ -34,6 +35,7 @@ cpu1: cpu@1 {
>  			reg = <1>;
>  			enable-method = "psci";
>  			clocks = <&ccu CLK_CPUX>;
> +			#cooling-cells = <2>;
>  		};
>  
>  		cpu2: cpu@2 {
> @@ -42,6 +44,7 @@ cpu2: cpu@2 {
>  			reg = <2>;
>  			enable-method = "psci";
>  			clocks = <&ccu CLK_CPUX>;
> +			#cooling-cells = <2>;
>  		};
>  
>  		cpu3: cpu@3 {
> @@ -50,6 +53,7 @@ cpu3: cpu@3 {
>  			reg = <3>;
>  			enable-method = "psci";
>  			clocks = <&ccu CLK_CPUX>;
> +			#cooling-cells = <2>;
>  		};
>  	};
>  
> @@ -156,6 +160,10 @@ sid: efuse@3006000 {
>  			ths_calibration: thermal-sensor-calibration@14 {
>  				reg = <0x14 0x8>;
>  			};
> +
> +			cpu_speed_grade: cpu-speed-grade@0 {
> +				reg = <0x0 2>;
> +			};
>  		};
>  
>  		watchdog: watchdog@30090a0 {
> 





_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel