Hi Yoonseok
for this case may be recommended to check if i2c is not owned by m4 resource, as in below
example (i2c1)
In such case one can move i2c resource to A core as in below example sect."Modifying default configuration" (moving FlexCAN resources from the M4 partition to the A cores partition)
Or try to use dts without "rpmsg", not use m4 core.
Best regards
igor
It was solved thanks to you.Thank you.