ti-官网自带的4.1实时内核,为什么cpufreq governor()选项,改变为performance后,cpu主频没有改变?
要改变cpu主频如何做?不改uboot的前提下?
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
ti-官网自带的4.1实时内核,为什么cpufreq governor()选项,改变为performance后,cpu主频没有改变?
要改变cpu主频如何做?不改uboot的前提下?
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu: cpu@0 {
compatible = "arm,cortex-a9";
device_type = "cpu";
reg = <0>;
clocks = <&dpll_mpu_ck>;
clock-names = "cpu";
/*
* To consider voltage drop between PMIC and SoC,
* tolerance value is reduced to 2% from 4% and
* voltage value is increased as a precaution.
*/
voltage-tolerance = <2>;
clock-latency = <300000>; /* From omap-cpufreq driver */
};
};
修改clock-latency是否能达到修改cpu主频的效果呢?