CDit
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I use a Raspberry Pi 5 and use I2C1 with external eeprom. With v25.5.1 up to kernel 6.6.63-current-bcm2711, /dev/i2c-1 is there (activated in /boot/firmware/config.txt with dtparam=i2c_arm=on) and communication with eeprom works fine. With newer kernel versions, communication works not, /dev/i2c-1 does not exist anymore in this case without changing any configuration, just selected newer kernel using armbian-config Any ideas why this happens?