Address gpio module todos (#1462)

* Add `set_state` for GpioPin

* `#![warn(missing_docs)]` for GPIO module

* CHANGELOG.md

esp-hal/CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Warn users when attempting to build using the `dev` profile (#1420)
 - Async uart now reports interrupt errors(overflow, glitch, frame error, parity) back to user of read/write. uart clock decimal part configured for c2,c3,s3 (#1168, #1445)
 - Add mechanism to configure UART source clock (#1416)
+- `GpioPin` got a function `set_state(bool)` (#1462)
 
 ### Fixed
 

esp-hal/src/gpio/etm.rs

@@ -31,6 +31,7 @@ use crate::peripheral::{Peripheral, PeripheralRef};
 
 /// All the GPIO ETM channels
 #[non_exhaustive]
+#[allow(missing_docs)]
 pub struct GpioEtmChannels<'d> {
     _gpio_sd: PeripheralRef<'d, crate::peripherals::GPIO_SD>,
     pub channel0_task: GpioEtmTaskChannel<0>,
@@ -52,6 +53,7 @@ pub struct GpioEtmChannels<'d> {
 }
 
 impl<'d> GpioEtmChannels<'d> {
+    /// Create a new instance
     pub fn new(peripheral: impl Peripheral<P = crate::peripherals::GPIO_SD> + 'd) -> Self {
         crate::into_ref!(peripheral);
 

esp-hal/src/gpio/lp_io.rs

@@ -159,6 +159,7 @@ fn get_pin_reg(pin: u8) -> &'static crate::peripherals::lp_io::GPIO0 {
 
 /// Configures a pin for use as a low power pin
 pub trait IntoLowPowerPin<const PIN: u8> {
+    /// Converts the pin into a low power pin
     fn into_low_power(self) -> LowPowerPin<Unknown, { PIN }>;
 }