HI, Iype
If there is no measure point on your sabrelite board, then it is hard to measure these power domain's power consumption, basically, we measured these power rails' consumption by these resistors' voltage drop and get the current via voltage drop divided by the resistor' s value. Or, we can cut those SHx, and connect a multimer between two points of SHx, then read the current from multimer. This is decent approach.
But if you indeed need to measure the power on sabrelite board, you can also try disabling the input for VDDxxx_IN, and supply power into VDDxxx_ CAP directly, then read the power from external power supply. For example, if you want to measure VDDARM, you can disable/cut VDDARM_IN, and supply a power(be careful about the voltage) into VDDARM_CAP, then it should be able to read power consumption from external power supply. This is because, if there is higher voltage on VDDARM_CAP then VDDARM_IN, the higher one will be sourced.
VDDARM -> ARM CORE;
VDDSOC-> SOC and PU(GPU and VPU), only vddsoc_in, but there is VDDSOC_CAP and VDDPU_CAP, ONE INPUT, two outputs, as VDDPU_Aries tied to VDDSOC_IN inside the chip.
You need to be careful that, supply power into VDDxxx_CAP is only a debug purpose approach, it is not recommended, I suggest you to work out a way (board rework) to add measure point into sabrelite board, and follow the way we did on sabersd board.
