UCM-iMX95 Yocto Linux: I2C

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To list all buses run: 

i2cdetect -l

To inspect a bus run: 

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

UU marks a device that is used by a driver, while numbers mark unused devices

To inspect a device at i2c address 0x50 run: 

cat /sys/bus/i2c/devices/1-0050/uevent

We see that this is an EEPROM.

An example of how to dump EEPROM contents: 

hexdump -C /sys/bus/i2c/devices/1-0050/eeprom
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