Gpio support v2 (#26)

* Improve GPIO driver and add button example
- port and pcr registers are defined using paste!
- added pin configuration for slew rate, drive strength, mux function, etc...
- added button example to showcase input gpio feature

Signed-off-by: Mathis Deroo <[email protected]>

* Add pull-up pull-down config support for input gpio

Signed-off-by: Mathis Deroo <[email protected]>

* Replace GPIOs enum with existing ones in the PAC

Signed-off-by: Mathis Deroo <[email protected]>

* Remove init_gpio_pin function as it is done in hal init config

Signed-off-by: Mathis Deroo <[email protected]>

* Integrate feedback for the GPIO driver

- Add again missing IO peripherals
- Added function to configure separately slew rate, drive strength, pull.
- Revert comment changes

Signed-off-by: Mathis Deroo <[email protected]>

* Create user-readable field for the pin configuration

Signed-off-by: Mathis Deroo <[email protected]>

* examples: button: remove left-over OSTIMER initialization

While at that, also cargo fmt

* Fix warnings

* Add documentation for public functions

Signed-off-by: Mathis Deroo <[email protected]>

* Expose port and pcr registers to AnyPin implementation

Signed-off-by: Mathis Deroo <[email protected]>

* Remove unnecessary change

Signed-off-by: Mathis Deroo <[email protected]>

* Run cargo fmt

---------

Signed-off-by: Mathis Deroo <[email protected]>
Co-authored-by: Felipe Balbi <[email protected]>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/lib.rs b/src/lib.rs
index e93ff61a6..175642f75 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,9 @@
 #![no_std]
-// TODO(AJM): As of 2025-11-13, we need to do a pass to ensure safety docs
-// are complete prior to release.
-#![allow(clippy::missing_safety_doc)]
+#![allow(async_fn_in_trait)]
+#![doc = include_str!("../README.md")]
+
+// //! ## Feature flags
+// #![doc = document_features::document_features!(feature_label = r#"<span class="stab portability"><code>{feature}</code></span>"#)]
 
 pub mod clocks; // still provide clock helpers
 pub mod gpio;