Re: Activate a Real Time Clock chip on I2C in Raspberry Pi 4B with Debian(not Raspbian)

[gene heskett <gheskett@shentel.net>]

On 4/16/23 04:01, Diederik de Haas wrote:
> On Sunday, 16 April 2023 04:47:37 CEST Rick Thomas wrote:
> > I've got a Raspberry Pi 4B (4GB) with a DS3231 RTC module.  I can make the
> > combo work with Ubuntu and RaspberryPI-OS.  I'd like to try it with the
> > plain-vanilla Debian from <https://raspi.debian.net/tested-images/> but I
> > can't find instructions for activating the I2C and RTC hardware in that OS.
>
> Documentation/devicetree/bindings/rtc/rtc-ds1307.yaml in the kernel source
> describes how one could use it ('compatible = "maxim,ds3231"' for DS3231).
> I think you should make a DeviceTree Overlay, but I don't know how to do that.

The last time I made a realtime preempt kernel for an armhf, the 
makefile did that.  Std output from a make menuconfig, an rpi4b runs it 
just as if it doesn't know any better, has been since Feb 20, 2020.

Cheers, Gene Heskett.
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