I have one idea of reducing the PS power consumption by configuring the PLL dynamically. So when the CPU is idle, switch to a lower frequency; when enter to working state, switch to a higher fre.
Following the AR 71070 to configure the CPU PLL. However, when the frequency is switched from 1.3GHz to 300MHz, the power keeps the same. I'm confused. So could you explain why or recommend a better method?