Re: [PATCH] dt-bindings: i2c: Remove obsolete i2c.txt

[Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>]

On Thu, Feb 22, 2024 at 10:43:42AM -0700, Rob Herring wrote:
> Everything in i2c.txt is covered by schemas/i2c/i2c-controller.yaml in
> dtschema project, so remove i2c.txt and update links to it in the tree.
> 
> Signed-off-by: Rob Herring <robh@xxxxxxxxxx>

Differences to i2c.txt:

* In the schema, "clock-frequency" has a minimum of 1kHz and a maximum
  of 3MHz. Why? The specs do not say anything about a minimum freq and
  fastest speed mentioned in the docs is 5Mhz (Ultra fast mode).

* new binding "i2c-scl-clk-low-timeout-us" has a description which I do
  not understand. What is a waiting state?

* new binding "no-detect" is broken. At the least, it should be named
  something like "bus-fully-described" and then the OS can decide to
  leave out auto-detection mechanisms. If you are interested in the
  latter, you can simply disable class based instantiation on the host
  controller. No need to describe this in DT.

> Wolfram, you can take it or I can.

Once we are done, I guess it is better if you take it.

Thanks for the work,

   Wolfram

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