Re: [PATCH v3 1/3] rust: i2c: add basic I2C device and driver abstractions

["Danilo Krummrich" <dakr@kernel.org>]

On Mon Aug 4, 2025 at 6:11 PM CEST, Wolfram Sang wrote:
> Thinking about it, there will not be a lot of patches for I2C Rust, or?

I think the changes to expect are mostly in three categories.

  (1) I2C infrastructure changes. For instance, this series contains the bus
      abstractions to probe an I2C (client) driver. So, I assume subsequent work
      may contain infrastructure for I2C regmap, adapter drivers, xfer
      algorithms, etc.

  (2) driver-core infrastructure changes related to the device / driver
      lifecycle.

  (3) Common Rust infrastructure changes.

(2) and (3) may also go through the driver-core and Rust trees, the frequency is
not too high, but I'd expect a few patches every cycle.

As for (1) I know of at least two Rust I2C drivers people are working on,
DS90UB954 (FDP-Link deserializer) and NCV6336, which I think is a buck
converter.

Depending on what Igor works on (I thought I read it somewhere, but do not
remember), we probably get away without adapter drivers and stuff for now.

Besides the I2C infrastructure they require (which doesn't seem too much at a
first glance), I think we also have to consider how drivers should be routed
eventually.

- Danilo