gpio: Make AnyPin, AnyInputOnlyPin, DummyPin available from gpio module (#1918)

Making these available straight from `gpio` aligns it with other Embassy
implementations (mainly nrf and stm32).

Signed-off-by: Priit Laes <plaes@plaes.org>

esp-hal/CHANGELOG.md

@@ -30,6 +30,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - SHA driver now use specific structs for the hashing algorithm instead of a parameter. (#1908)
 - Remove `fn free(self)` in HMAC which goes against esp-hal API guidelines (#1972)
 - PARL_IO use ReadBuffer and WriteBuffer for Async DMA (#1996)
+- `AnyPin`, `AnyInputOnyPin` and `DummyPin` are now accessible from `gpio` module (#1918)
 
 ### Fixed
 

esp-hal/src/gpio/any_pin.rs

@@ -1,9 +1,3 @@
-//! Type-erased wrappers for GPIO pins.
-//! These are useful to pass them into peripheral drivers.
-//!
-//! If you want a generic pin for GPIO input/output look into
-//! [Output],[OutputOpenDrain], [Input] and [Flex].
-
 use super::*;
 
 #[derive(Clone, Copy)]

esp-hal/src/gpio/mod.rs

@@ -21,10 +21,10 @@
 //! - [Input] pins can be used as digital inputs.
 //! - [Output] and [OutputOpenDrain] pins can be used as digital outputs.
 //! - [Flex] pin is a pin that can be used as an input and output pin.
-//! - [any_pin::AnyPin] pin is type-erased that can be used for peripherals
+//! - [AnyPin] and [AnyInputOnlyPin] are type-erased GPIO pins with support for
-//!   signals.
+//!   inverted signalling.
-//!    - It supports inverting the pin, so the peripheral signal can be
+//! - [DummyPin] is a useful for cases where peripheral driver requires a pin,
-//!      inverted.
+//!   but real pin cannot be used.
 //!
 //! ## Examples
 //! ### Set up a GPIO as an Output
@@ -67,8 +67,11 @@ use crate::{
 #[cfg(touch)]
 pub(crate) use crate::{touch_common, touch_into};
 
-pub mod any_pin;
+mod any_pin;
-pub mod dummy_pin;
+mod dummy_pin;
+
+pub use any_pin::{AnyInputOnlyPin, AnyPin};
+pub use dummy_pin::DummyPin;
 
 #[cfg(soc_etm)]
 pub mod etm;

esp-hal/src/uart.rs

@@ -90,7 +90,7 @@
 //! ```rust, no_run
 #![doc = crate::before_snippet!()]
 //! # use esp_hal::uart::{config::Config, Uart};
-//! use esp_hal::gpio::{Io, any_pin::AnyPin};
+//! use esp_hal::gpio::{AnyPin, Io};
 //! let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
 //!
 //! let tx = AnyPin::new_inverted(io.pins.gpio1);
@@ -103,7 +103,7 @@
 //! ```rust, no_run
 #![doc = crate::before_snippet!()]
 //! # use esp_hal::uart::{config::Config, UartTx, UartRx};
-//! use esp_hal::gpio::{Io, any_pin::AnyPin};
+//! use esp_hal::gpio::{AnyPin, Io};
 //! let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);
 //!
 //! let tx = UartTx::new(peripherals.UART0, &clocks,

examples/src/bin/spi_loopback.rs

@@ -22,7 +22,7 @@ use esp_backtrace as _;
 use esp_hal::{
     clock::ClockControl,
     delay::Delay,
-    gpio::{any_pin::AnyPin, Io},
+    gpio::{AnyPin, Io},
     peripherals::Peripherals,
     prelude::*,
     spi::{master::Spi, SpiMode},

hil-test/tests/gpio.rs

@@ -16,7 +16,7 @@ use critical_section::Mutex;
 use esp_hal::{
     clock::ClockControl,
     delay::Delay,
-    gpio::{any_pin::AnyPin, Gpio2, Gpio3, GpioPin, Input, Io, Level, Output, Pull},
+    gpio::{AnyPin, Gpio2, Gpio3, GpioPin, Input, Io, Level, Output, Pull},
     macros::handler,
     peripherals::Peripherals,
     system::SystemControl,

hil-test/tests/lcd_cam_i8080.rs

@@ -9,7 +9,7 @@ use esp_hal::{
     clock::{ClockControl, Clocks},
     dma::{Dma, DmaDescriptor, DmaPriority},
     dma_buffers,
-    gpio::dummy_pin::DummyPin,
+    gpio::DummyPin,
     lcd_cam::{
         lcd::{
             i8080,

hil-test/tests/lcd_cam_i8080_async.rs

@@ -10,7 +10,7 @@ use esp_hal::{
     clock::{ClockControl, Clocks},
     dma::{Dma, DmaDescriptor, DmaPriority},
     dma_buffers,
-    gpio::dummy_pin::DummyPin,
+    gpio::DummyPin,
     lcd_cam::{
         lcd::{
             i8080,