patch: make i2c(8) usable for scripting

[Mark Murray]

> On 16 May 2021, at 13:53, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> 
> --------
> Mark Murray writes:
> 
> 
>> On 15 May 2021, at 21:14, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
>>> These modes always use the I2CRDWR ioctl, which works on all the
>> hardware I have.
>> 
>> Please could you list what you have, for the record?
> 
> Rpi4 & BBB

Thank you! I had to jump through hoops to get I2C to work at all on RPi4 8GB. What was your method for getting this right?

At some point, when I have enough circular to-its, I want to attend to the differences between BCM2835 and BCM2711, the list of which is growing.

M
--
Mark R V Murray

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