[问答]

如何才能固定CPU频率？

2428 RK3288

问答对人有帮助，内容完整，我也想知道答案 0 如何才能固定CPU频率？ 0
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答案对人有帮助，有参考价值 0 需求：固定CPU频率方法：路径：/kernel/arch/arm/boot/dts/rk3288.dtsi CPU默认为变频，代码如下； cpu0_opp_table: opp_table0 { compatible = "operating-points-v2"; opp-shared; clocks = <&cru PLL_APLL>; rockchip,avs-scale = <17>; rockchip,max-volt = <1350000>; nvmem-cells = <&cpu_leakage>, <&special_function>, <&performance>, <&process_version>, <&performance_w>; nvmem-cell-names = "leakage", "special", "performance", "process", "performance-w"; rockchip,bin-scaling-sel = < 0 17 1 25 2 27 3 31 >; rockchip,pvtm-voltage-sel = < 0 14300 0 14301 15000 1 15001 16000 2 16001 99999 3 >; rockchip,pvtm-freq = <408000>; rockchip,pvtm-volt = <1000000>; rockchip,pvtm-ch = <0 0>; rockchip,pvtm-sample-time = <1000>; rockchip,pvtm-number = <10>; rockchip,pvtm-error = <1000>; rockchip,pvtm-ref-temp = <35>; rockchip,pvtm-temp-prop = <(-18) (-18)>; rockchip,thermal-zone = "soc-thermal"; opp-126000000 { opp-hz = /bits/ 64 <126000000>; opp-microvolt = <950000 950000 1350000>; opp-microvolt-L0 = <950000 950000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-216000000 { opp-hz = /bits/ 64 <216000000>; opp-microvolt = <950000 950000 1350000>; opp-microvolt-L0 = <950000 950000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-408000000 { opp-hz = /bits/ 64 <408000000>; opp-microvolt = <975000 975000 1350000>; opp-microvolt-L0 = <975000 975000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-600000000 { opp-hz = /bits/ 64 <600000000>; opp-microvolt = <975000 975000 1350000>; opp-microvolt-L0 = <975000 975000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-696000000 { opp-hz = /bits/ 64 <696000000>; opp-microvolt = <975000 975000 1350000>; opp-microvolt-L0 = <975000 975000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-816000000 { opp-hz = /bits/ 64 <816000000>; opp-microvolt = <1075000 1075000 1350000>; opp-microvolt-L0 = <1075000 1075000 1350000>; opp-microvolt-L1 = <1050000 1050000 1350000>; opp-microvolt-L2 = <1000000 1000000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; opp-suspend; }; opp-1008000000 { opp-hz = /bits/ 64 <1008000000>; opp-microvolt = <1150000 1150000 1350000>; opp-microvolt-L0 = <1150000 1150000 1350000>; opp-microvolt-L1 = <1100000 1100000 1350000>; opp-microvolt-L2 = <1050000 1050000 1350000>; opp-microvolt-L3 = <1000000 1000000 1350000>; clock-latency-ns = <40000>; }; opp-1200000000 { opp-hz = /bits/ 64 <1200000000>; opp-microvolt = <1200000 1200000 1350000>; opp-microvolt-L0 = <1200000 1200000 1350000>; opp-microvolt-L1 = <1150000 1150000 1350000>; opp-microvolt-L2 = <1100000 1100000 1350000>; opp-microvolt-L3 = <1050000 1050000 1350000>; clock-latency-ns = <40000>; }; opp-1416000000 { opp-hz = /bits/ 64 <1416000000>; opp-microvolt = <1300000 1300000 1350000>; opp-microvolt-L0 = <1300000 1300000 1350000>; opp-microvolt-L1 = <1250000 1250000 1350000>; opp-microvolt-L2 = <1200000 1200000 1350000>; opp-microvolt-L3 = <1150000 1150000 1350000>; clock-latency-ns = <40000>; }; opp-1512000000 { opp-hz = /bits/ 64 <1512000000>; opp-microvolt = <1350000 1350000 1350000>; opp-microvolt-L0 = <1350000 1350000 1350000>; opp-microvolt-L1 = <1300000 1300000 1350000>; opp-microvolt-L2 = <1250000 1250000 1350000>; opp-microvolt-L3 = <1200000 1200000 1350000>; clock-latency-ns = <40000>; }; opp-1608000000 { opp-hz = /bits/ 64 <1608000000>; opp-microvolt = <1350000 1350000 1350000>; opp-microvolt-L0 = <1350000 1350000 1350000>; opp-microvolt-L1 = <1350000 1350000 1350000>; opp-microvolt-L2 = <1300000 1300000 1350000>; opp-microvolt-L3 = <1250000 1250000 1350000>; clock-latency-ns = <40000>; }; }; 例如：固定频率两个频率，注释掉其他即可 cpu0_opp_table: opp_table0 { compatible = "operating-points-v2"; opp-shared; clocks = <&cru PLL_APLL>; rockchip,avs-scale = <17>; rockchip,max-volt = <1350000>; nvmem-cells = <&cpu_leakage>, <&special_function>, <&performance>, <&process_version>, <&performance_w>; nvmem-cell-names = "leakage", "special", "performance", "process", "performance-w"; rockchip,bin-scaling-sel = < 0 17 1 25 2 27 3 31 >; rockchip,pvtm-voltage-sel = < 0 14300 0 14301 15000 1 15001 16000 2 16001 99999 3 >; rockchip,pvtm-freq = <408000>; rockchip,pvtm-volt = <1000000>; rockchip,pvtm-ch = <0 0>; rockchip,pvtm-sample-time = <1000>; rockchip,pvtm-number = <10>; rockchip,pvtm-error = <1000>; rockchip,pvtm-ref-temp = <35>; rockchip,pvtm-temp-prop = <(-18) (-18)>; rockchip,thermal-zone = "soc-thermal"; /* opp-126000000 { opp-hz = /bits/ 64 <126000000>; opp-microvolt = <950000 950000 1350000>; opp-microvolt-L0 = <950000 950000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-216000000 { opp-hz = /bits/ 64 <216000000>; opp-microvolt = <950000 950000 1350000>; opp-microvolt-L0 = <950000 950000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-408000000 { opp-hz = /bits/ 64 <408000000>; opp-microvolt = <975000 975000 1350000>; opp-microvolt-L0 = <975000 975000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-600000000 { opp-hz = /bits/ 64 <600000000>; opp-microvolt = <975000 975000 1350000>; opp-microvolt-L0 = <975000 975000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-696000000 { opp-hz = /bits/ 64 <696000000>; opp-microvolt = <975000 975000 1350000>; opp-microvolt-L0 = <975000 975000 1350000>; opp-microvolt-L1 = <950000 950000 1350000>; opp-microvolt-L2 = <950000 950000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; }; opp-816000000 { opp-hz = /bits/ 64 <816000000>; opp-microvolt = <1075000 1075000 1350000>; opp-microvolt-L0 = <1075000 1075000 1350000>; opp-microvolt-L1 = <1050000 1050000 1350000>; opp-microvolt-L2 = <1000000 1000000 1350000>; opp-microvolt-L3 = <950000 950000 1350000>; clock-latency-ns = <40000>; opp-suspend; }; opp-1008000000 { opp-hz = /bits/ 64 <1008000000>; opp-microvolt = <1150000 1150000 1350000>; opp-microvolt-L0 = <1150000 1150000 1350000>; opp-microvolt-L1 = <1100000 1100000 1350000>; opp-microvolt-L2 = <1050000 1050000 1350000>; opp-microvolt-L3 = <1000000 1000000 1350000>; clock-latency-ns = <40000>; }; opp-1200000000 { opp-hz = /bits/ 64 <1200000000>; opp-microvolt = <1200000 1200000 1350000>; opp-microvolt-L0 = <1200000 1200000 1350000>; opp-microvolt-L1 = <1150000 1150000 1350000>; opp-microvolt-L2 = <1100000 1100000 1350000>; opp-microvolt-L3 = <1050000 1050000 1350000>; clock-latency-ns = <40000>; }; / opp-1416000000 { opp-hz = /bits/ 64 <1416000000>; opp-microvolt = <1300000 1300000 1350000>; opp-microvolt-L0 = <1300000 1300000 1350000>; opp-microvolt-L1 = <1250000 1250000 1350000>; opp-microvolt-L2 = <1200000 1200000 1350000>; opp-microvolt-L3 = <1150000 1150000 1350000>; clock-latency-ns = <40000>; }; opp-1512000000 { opp-hz = /bits/ 64 <1512000000>; opp-microvolt = <1350000 1350000 1350000>; opp-microvolt-L0 = <1350000 1350000 1350000>; opp-microvolt-L1 = <1300000 1300000 1350000>; opp-microvolt-L2 = <1250000 1250000 1350000>; opp-microvolt-L3 = <1200000 1200000 1350000>; clock-latency-ns = <40000>; }; / opp-1608000000 { opp-hz = /bits/ 64 <1608000000>; opp-microvolt = <1350000 1350000 1350000>; opp-microvolt-L0 = <1350000 1350000 1350000>; opp-microvolt-L1 = <1350000 1350000 1350000>; opp-microvolt-L2 = <1300000 1300000 1350000>; opp-microvolt-L3 = <1250000 1250000 1350000>; clock-latency-ns = <40000>; }; */ };

2022-3-3 11:39:56 评论举报王静