rpi4: linux-image-6.1.0-18-arm64 kernel does not detect ds1307 rtc

[Tuxo <tuxoholic@hotmail.de>]

Hi list,

My ds1307 rtc module plugged into my Raspberry Pi 4B (4GB) model is not 
getting recognized by the the Bookworm arm64 kernel.

In Raspian and Ubuntu the driver is built as a module with 
CONFIG_RTC_DRV_DS1307=m and loading happens with 
dtoverlay=i2c-rtc,ds3231 in config.txt.

Debian does compile it into vmlinuz with CONFIG_RTC_DRV_DS1307=y but the 
hardware detection fails with no mentioning of rtc in dmesg.

i2c_dev and i2c_bcm2835 are loaded, but i2cdetect -y 1 does not detect 
the rtc on the bus.

Is this a bug or where there no plans to add this to the rpi4 feature set?

I'm not subscribed to the list, please CC your replies.

Thanks and Regards

Tuxo