Re: DS3231 RTC module not detected

> On 21 Feb 2022, at 21:50, Archimedes Gaviola <archimedes.gaviola@gmail.com> wrote:
> Did you re-compile your kernel? Brian has shared his resolution on customizing the GENERIC kernel here 

No I didn't realise it was necessary :)

> https://lists.freebsd.org/archives/freebsd-arm/2022-February/001024.html which allows to free-up the i2c address 0x68 which by default is being used by the MAX77620 RTC driver from the SOC_NVIDIA_TEGRA210. So, you need to add these lines in your kernel (I assume it's still the GENERIC otherwise use your existing config),
> 
> include         GENERIC
> ident             GENERIC-PI
> nooptions     SOC_NVIDIA_TEGRA210
> 
> and then recompile. Keep your /boot/msdos/config.txt and /boot/msdos/overlays/ds1307.dtbo files intact. After recompiling and rebooting, you can check the dmesg if the ds1307 driver is loaded, otherwise invoke "kldload ds1307" and see if it's detected. Add a line into your /boot/loader.conf with ds1307_enable="YES" if necessary. Lastly, kindly backup your data before recompiling for safety.
> 
> This is the way I do it with my ds3231 driver, hope you will get the same result.

Thanks.

I chatted to some people on IRC and I think it's fixed in a later version anyway with these commits:
https://cgit.freebsd.org/src/commit/?id=1bd3e8ba696633ccd7525030d951b58ade167814
https://cgit.freebsd.org/src/commit/?id=a534b50e245d801af887d91b5d48ebcf120aa039

Although I have not been brave enough to update to HEAD and try it yet :)

--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
 -- Andrew Tanenbaum