Hello Tuxo, On 6/27/24 10:15, Tuxo wrote:
My ds1307 rtc module plugged into my Raspberry Pi 4B (4GB) model is not getting recognized by the the Bookworm arm64 kernel.
Which pins do you use to connect to the RTC?
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.
Can you provide the overlay-file you're using in raspian?
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.
Note the bus number might be different when using different kernels.
Is this a bug or where there no plans to add this to the rpi4 feature set?
do you irc? This communication form is (IMHO) better suited for such debugging. I'm in #debian-raspberrypi on OFTC.
Best regards Uwe
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