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Troubleshooting • Pi 5 rtc not working when rtc battery charging is activated

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My real time clock is not working when i activate rtc battery charging for the connected rtc battery (https://www.raspberrypi.com/documentati ... -clock-rtc)

As soon as i add "dtparam=rtc_bbat_vchg=3000000" to the config and restart
my /sys/devices/platform/soc/soc:rpi_rtc folder vanishes and rtc doesnt work anymore.
Neiter with connected usb-c power nor with battery. I also checked with "sudo timedatectl" and RTC time showes as N/A

When i then delete "dtparam=rtc_bbat_vchg=3000000" the rtc works again with power and only battery and also rtc time shows with "sudo timedatectl"
The /sys/devices/platform/soc/soc:rpi_rtc is also back.

Can someone help me what the problem is? Or is this a bug?
I already reinstalled the os and reconnected the battery.

Thanks a lot in advance

Statistics: Posted by Emperor — Mon Apr 15, 2024 4:12 pm



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