Zero3E Using i2cdetect -y 0 see two devices on the i2c bus?

#1

Zero3E Using i2cdetect -y 0 see two devices on the i2c bus? Any documentation or why to figure out what these are?

# i2cdetect -y 0
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Appear to be at 0x20 and 0x40. But there are tons of i2c sensors and what not that use these rather common addresses.

#2

These two are defined in zero3 dts

#3

If I understand what I am looking at is the sensor @0x20 is power state, and @0x40 is power regulator status.

Is there an example of how to read this devices?

Can the register@0x40 be used to determine if the SBC is in a throttled or controlled power state? Say like how you can query a Pi device to see it has suffered and under-volt state, or otherwise been throttled to protect the processor(s)?