Can someone tell me how to read the operating voltage? To the best of my understanding, the operational voltage for circuits in modern microprocessors is usually in 0.9-1.2V range. But what we can get from the system file /sys/devices/3160000.i2c/i2c-0/0-0041/iio_device/in_voltage1_input is always 19V, independent of frequency settings. But the voltage should change with the frequency change. Does anyone have any idea of this problem? Thanks in advance!