Added asynchronous pwm functionality

[lucavezoc]

No description provided.

[nastevens]

Using the full feature set is an antipattern in libraries per the tokio docs. Could you please reduce this to just the needed features?

[lucavezoc]

Fixed!

[nastevens]

@rust-embedded/embedded-linux I think I'd like to see this published as a separate crate sysfs-pwm-async. We'd still add the code to this repo, just with its own Cargo.toml. Thoughts?

[eldruin]

Putting it in a separate crate seems fine to me since at least the current version does not share anything with the blocking version other than the error type.
If doing so, I would convert this repository to a workspace and have two folders like sysfs-pwm and sys-pwm-async like we do over at embedded-hal.
If you need help with the restructuring, let me know.

[lucavezoc]

Putting it in a separate crate seems fine to me since at least the current version does not share anything with the blocking version other than the error type.

How would I go about doing that?

[nastevens]

How would I go about doing that?

Hey sorry for the delay @lucaVuitton, I had planned to make this change but there's been some things in my personal life that are taking priority. If you want to take a try at it, a good place to start would be looking at the structure of the Cargo.toml files in https://github.com/rust-embedded/embedded-hal. There is a top workspace Cargo.toml, and then each subcrate (sysfs-pwm and sysfs-pwm-async) would get their own subdirectories with Cargo.toml files of their own. If you're okay waiting I'll also get back to this as soon as I can. Thanks!