Advanced users • CM4 RTC Issue Via Config.txt

Hello,

I am working on the CM4 board.

I've installed a battery in the RTC, but I'm encountering an issue where the RTC module doesn't load automatically via config.txt. However, when I manually load the driver, the RTC module loads correctly and the time is displayed.

pi@raspberrypi:~ $ dmesg | grep rtc
[ 4.312875] rtc-pcf85063 1-0051: RTC chip is not present
[ 4.312933] rtc-pcf85063 1-0051: probe with driver rtc-pcf85063 failed with error -121

Can someone please help in troubleshooting this issue ?

Statistics: Posted by delams — Tue May 06, 2025 4:00 am

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