Represent line levels as a bool about gpio-cdev HOT 4 OPEN

The actual value (0, non-zero) is modeling "active" state for the line which can be inverted in the kernel via the active-low setting. I could see is_active and set_active as an API that modeled what this is in the kernel being something that make sense. This could be in addition to the value or as a full replacement.

from gpio-cdev.

Whenever I wrap a C library or API in a language that has a bool type (C++, Rust, etc), I usually prefer to convert the C integer boolean (0, non-zero) to a bool to be a little more explicit about the possible values, and remove ambiguities. But it's no big deal either way.

from gpio-cdev.

Possibly relevant. I've been working on a reusable abstraction for logic levels.
The idea is to abstract over whether an I/O line is active high or low and only expose whether or not it is currently asserted.

https://github.com/rubberduck203/switch-hal

from gpio-cdev.

i can't find it right now but i believe there is discussion about introducing a LogicLevel (or similar) enum along with some more gpio accessors somewhere amongst our issues and PRs.

from gpio-cdev.