Add missing docs

Author: remimimimimi

src/lib.rs

@@ -52,13 +52,15 @@ macro_rules! wait_for {
     };
 }
 
+/// Memory mapped implementation
 pub mod mmio;
 #[cfg(target_arch = "x86_64")]
+/// Port asm commands implementation
 pub mod x86_64;
 
+pub use crate::mmio::MmioSerialPort;
 #[cfg(target_arch = "x86_64")]
 pub use crate::x86_64::SerialPort;
-pub use crate::mmio::MmioSerialPort;
 
 bitflags! {
     /// Interrupt enable flags

src/mmio.rs

@@ -1,8 +1,12 @@
+use core::{
+    fmt,
+    sync::atomic::{
+        AtomicPtr,
+        Ordering,
+    },
+};
+
 use crate::LineStsFlags;
-use core::{fmt, sync::atomic::{
-    AtomicPtr,
-    Ordering,
-}};
 
 /// An interface to a serial port that allows sending out individual bytes.
 pub struct MmioSerialPort {

src/x86_64.rs

@@ -1,6 +1,8 @@
+use core::fmt;
+
 use x86_64::instructions::port::Port;
+
 use crate::LineStsFlags;
-use core::fmt;
 
 /// An interface to a serial port that allows sending out individual bytes.
 pub struct SerialPort {