Seal the PeripheralInput and PeripheralOutput traits (#2690)

* Seal the `PeripheralInput` and `PeripheralOutput` traits

* Update `CHANGELOG.md`

esp-hal/CHANGELOG.md

@@ -58,6 +58,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - I8080, camera, DPI: The various standalone configuration options have been merged into `Config` (#2610)
 - Dropped GPIO futures stop listening for interrupts (#2625)
 - UART driver's `StopBits` enum variants now correctly use UpperCamelCase (#2669)
+- The `PeripheralInput` and `PeripheralOutput` traits are now sealed (#2690)
 
 ### Fixed
 

esp-hal/src/gpio/interconnect.rs

@@ -28,13 +28,13 @@ use crate::{
 ///
 /// Peripheral drivers are encouraged to accept types that implement this and
 /// [`PeripheralOutput`] as arguments instead of pin types.
-pub trait PeripheralInput: Into<InputConnection> + 'static {}
+pub trait PeripheralInput: Into<InputConnection> + 'static + crate::private::Sealed {}
 
 /// A signal that can be connected to a peripheral input and/or output.
 ///
 /// Peripheral drivers are encouraged to accept types that implement this and
 /// [`PeripheralInput`] as arguments instead of pin types.
-pub trait PeripheralOutput: Into<OutputConnection> + 'static {}
+pub trait PeripheralOutput: Into<OutputConnection> + 'static + crate::private::Sealed {}
 
 // Pins
 impl<P: InputPin> PeripheralInput for P {}