Re: DS3231 RTC module not detected

On Mon, Feb 21, 2022 at 7:29 PM Daniel O'Connor <[email protected]> wrote:

>
>
> > On 21 Feb 2022, at 21:50, Archimedes Gaviola <
> [email protected]> 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 :)
>

Yes it is :-)


>
> > 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.
>


You're welcome.


>
> 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
>
>
Wow, this is good news...


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

Yeah, better to wait than meet a lot of surprises with HEAD :-)