opp_table)return-ENOMEM;val=prop->value;while(nr){unsignedlongfreq=be32_to_cpup(val++)*1000;...
Hi team, I am using the imx6qsabresd custom board , there I am getting the error like below, cpu cpu0: Empty OPP table [ 5.130455] cpu cpu0: OPP
policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000; ret = cpufreq_table_validate_and_show(policy, freq_table); cpufreq_table_validate_and_show()里面找到CPU支持的最大和最小频率 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, struct cpufreq_frequency...
operating-points-v2 = <&cpu_opp_table>; cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>; #cooling-cells = <2>; dynamic-power-coefficient = <311>; }; 即在内核中cpu也被抽象成了一种设备,并且可以为其配置一系列的参数。其中reg即用于配置其硬件id,而其它参数将会在后面相关模块中逐步介绍。 由于...
16、 opp-microvolt-L* ：电压(微伏)，格式<target min max> 17、 clock-latency-ns ：完成变频需要的时间，单位：纳秒。在 RK3399 中，除了配置上述小核的 opp table 外，还设置了大核（ cluster1_opp ）、 gpu(gpu_opp_table) 等的相关值。查看命令如下：注：CPU PVTM(Process Voltage ...
cpu0_opp_table: cpu0-opp-table { compatible = "operating-points-v2"; opp-shared; opp-408000000 { opp-hz = /bits/ 64 <408000000>; opp-microvolt = <950000 950000 1340000>; clock-latency-ns = <40000>; opp-suspend; status = "disabled"; ...
operating-points-v2= <&cluster0_opp>; dynamic-power-coefficient= <275>; capacity-dmips-mhz= <1024>; cpu-idle-states= <&STANDBY &MCDI_CPU &MCDI_CLUSTER>, <&SODI &SODI3 &DPIDLE &SUSPEND>; }; cpu3: cpu@003{ device_type ="cpu"; ...
**1. 检查OPP表配置** 在设备树中确认CPU的OPP节点配置，典型配置如下：```dts &cpu0_opp_table {...
1cpu0: cpu@0{2compatible ="arm,cortex-a53";3device_type ="cpu";4enable-method ="psci"; /* 启动方式选择 PSCI */5operating-points-v2= < &cpu_opp_table >;6reg = <0x0>;7cpu-idle-states = < &CPU_SLEEP_0>;8}; 并且有一个 PSCI 的节点: ...
generic_bL_probe接口很简单,以dt_bL_ops为参数,调用bL_cpufreq_register接口,注册cpufreq driver。dt_bL_ops是一个struct cpufreq_arm_bL_ops类型的变量,提供两个回调函数,分别用于获取cluster切换之间的延迟,以及初始化opp table,后面用到的时候再介绍。