Remove PhantomData<*const ()> from peripherals

CHANGELOG.md

@@ -28,6 +28,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Don't generate pre Edition 2018 `extern crate` statements anymore
 
+- Remove `PhantomData` marker from peripherals
+
 ## [v0.17.0] - 2019-12-31
 
 ### Fixed

src/generate/device.rs

@@ -77,7 +77,6 @@ pub fn render(
 
     out.extend(quote! {
         use core::ops::Deref;
-        use core::marker::PhantomData;
     });
 
     // Retaining the previous assumption
@@ -190,7 +189,7 @@ pub fn render(
             #[doc = #p]
             pub #id: #id,
         });
-        exprs.extend(quote!(#id: #id { _marker: PhantomData },));
+        exprs.extend(quote!(#id: #id {}, ));
     }
 
     let span = Span::call_site();

src/generate/peripheral.rs

@@ -54,7 +54,7 @@ pub fn render(
     // Insert the peripheral structure
     out.extend(quote! {
         #[doc = #description]
-        pub struct #name_pc { _marker: PhantomData<*const ()> }
+        pub struct #name_pc { }
 
         unsafe impl Send for #name_pc {}