Commit 0e183fcc authored by Dragan Simic's avatar Dragan Simic Committed by Heiko Stuebner
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arm64: dts: rockchip: Update CPU OPP voltages in RK356x SoC dtsi 

Update the lower/upper voltage limits and the exact voltages for the Rockchip
RK356x CPU OPPs, using the most conservative values (i.e. the highest per-OPP
voltages) found in the vendor kernel source. [1]

Using the most conservative per-OPP voltages ensures reliable CPU operation
regardless of the actual CPU binning, with the downside of possibly using
a bit more power for the CPU cores than absolutely needed.

Additionally, fill in the missing "clock-latency-ns" CPU OPP properties, using
the values found in the vendor kernel source. [1]

[1] https://raw.githubusercontent.com/rockchip-linux/kernel/f8b9431ee38ed561650be7092ab93f564598daa9/arch/arm64/boot/dts/rockchip/rk3568.dtsi



Related-to: eb665b1c ("arm64: dts: rockchip: Update GPU OPP voltages in RK356x SoC dtsi")
Signed-off-by: default avatarDragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/f816cd24b62742dd05a1b7c6fe162bb581c9b3bf.1730516702.git.dsimic@manjaro.org


Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent 37e4ad9c

arch/arm64/boot/dts/rockchip/rk3568.dtsi

+1 −0
Original line number Diff line number Diff line
@@ -273,6 +273,7 @@ &cpu0_opp_table { 
	opp-1992000000 {

		opp-hz = /bits/ 64 <1992000000>;

		opp-microvolt = <1150000 1150000 1150000>;

		clock-latency-ns = <40000>;

	};

};

arch/arm64/boot/dts/rockchip/rk356x.dtsi

+12 −6
Original line number Diff line number Diff line
@@ -134,39 +134,45 @@ cpu0_opp_table: opp-table-0 { 


		opp-408000000 {

			opp-hz = /bits/ 64 <408000000>;

			opp-microvolt = <900000 900000 1150000>;

			opp-microvolt = <850000 850000 1150000>;

			clock-latency-ns = <40000>;

		};



		opp-600000000 {

			opp-hz = /bits/ 64 <600000000>;

			opp-microvolt = <900000 900000 1150000>;

			opp-microvolt = <850000 850000 1150000>;

			clock-latency-ns = <40000>;

		};



		opp-816000000 {

			opp-hz = /bits/ 64 <816000000>;

			opp-microvolt = <900000 900000 1150000>;

			opp-microvolt = <850000 850000 1150000>;

			clock-latency-ns = <40000>;

			opp-suspend;

		};



		opp-1104000000 {

			opp-hz = /bits/ 64 <1104000000>;

			opp-microvolt = <900000 900000 1150000>;

			clock-latency-ns = <40000>;

		};



		opp-1416000000 {

			opp-hz = /bits/ 64 <1416000000>;

			opp-microvolt = <900000 900000 1150000>;

			opp-microvolt = <1025000 1025000 1150000>;

			clock-latency-ns = <40000>;

		};



		opp-1608000000 {

			opp-hz = /bits/ 64 <1608000000>;

			opp-microvolt = <975000 975000 1150000>;

			opp-microvolt = <1100000 1100000 1150000>;

			clock-latency-ns = <40000>;

		};



		opp-1800000000 {

			opp-hz = /bits/ 64 <1800000000>;

			opp-microvolt = <1050000 1050000 1150000>;

			opp-microvolt = <1150000 1150000 1150000>;

			clock-latency-ns = <40000>;

		};

	};