[PATCH v14 2/7] rust: pwm: Add Kconfig and basic data structures

[Uwe Kleine-König]

Hello Michal,

On Wed, Aug 20, 2025 at 10:35:37AM +0200, Michal Wilczynski wrote:
> Introduce the foundational support for PWM abstractions in Rust.
> 
> This commit adds the `RUST_PWM_ABSTRACTIONS` Kconfig option to enable
> the feature, along with the necessary build-system support and C
> helpers.
> 
> It also introduces the first set of safe wrappers for the PWM
> subsystem, covering the basic data carrying C structs and enums:
> - `Polarity`: A safe wrapper for `enum pwm_polarity`.
> - `Waveform`: A wrapper for `struct pwm_waveform`.
> - `Args`: A wrapper for `struct pwm_args`.
> - `State`: A wrapper for `struct pwm_state`.

Args, State and Polarity are only needed for the consumer side of the
PWM API in Rust, right?

I don't particularily like like pwm_args and wonder if this really has
to be exposed to Rust.

I think for State (and thus Polarity) we have to have it for the
forseeable future.

Best regards
Uwe
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