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arm64: dts: rockchip: Update CPU OPP voltages in RK356x SoC dtsi

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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: eb665b1c06 ("arm64: dts: rockchip: Update GPU OPP voltages in RK356x SoC dtsi")
Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Link: https://lore.kernel.org/r/f816cd24b62742dd05a1b7c6fe162bb581c9b3bf.1730516702.git.dsimic@manjaro.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Dragan Simic
2024-11-02 04:08:59 +01:00
committed by Heiko Stuebner
parent 37e4ad9c79
commit 0e183fcc92
2 changed files with 13 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm64/boot/dts/rockchip/rk3568.dtsi
View File

@@ -273,6 +273,7 @@ &cpu0_opp_table {
opp-1992000000 {
opp-hz = /bits/ 64 <1992000000>;
opp-microvolt = <1150000 1150000 1150000>;
clock-latency-ns = <40000>;
};
};

18
arch/arm64/boot/dts/rockchip/rk356x.dtsi
View File

@@ -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>;
};
};