chore: Fix compile errors on rustc nightly

atsamd-hal-macros/src/lib.rs

@@ -70,11 +70,11 @@ fn hal_cfg_impl(args: TokenStream) -> Result<Group, Error> {
 ///     "nvmctrl-d5x" => "calibration/d5x.rs",
 /// )]
 /// pub mod calibration {}
-
+///
 /// #[hal_module("aes")
 /// pub mod aes {}
 /// ```
-/// 
+///
 /// This will then expand to something of the form:
 /// ```ignore
 /// #[cfg(any(feature = "samd11c", ...))]
@@ -88,7 +88,7 @@ fn hal_cfg_impl(args: TokenStream) -> Result<Group, Error> {
 /// #[cfg(any(feature = "samd51g", ...))]
 /// pub mod aes;
 /// ```
-/// 
+///
 /// Ideally you would be to write `pub mod calibration;` instead of
 /// `pub mod calibration {}`, but unfortunately non-inline modules are not
 /// currently supposed in proc macros. See

hal/src/dmac/dma_controller.rs

@@ -158,15 +158,18 @@ impl DmaController {
 
         Self::swreset(&mut dmac);
 
-        // SAFETY this is safe because we write a whole u32 to 32-bit registers,
+        // SAFETY:
+        //
+        // This is safe because we write a whole u32 to 32-bit registers,
         // and the descriptor array addesses will never change since they are static.
         // We just need to ensure the writeback and descriptor_section addresses
         // are valid.
+        #[allow(static_mut_refs)]
         unsafe {
             dmac.baseaddr()
-                .write(|w| w.baseaddr().bits(DESCRIPTOR_SECTION.as_ptr() as u32));
+                .write(|w| w.baseaddr().bits(DESCRIPTOR_SECTION.as_mut_ptr() as u32));
             dmac.wrbaddr()
-                .write(|w| w.wrbaddr().bits(WRITEBACK.as_ptr() as u32));
+                .write(|w| w.wrbaddr().bits(WRITEBACK.as_mut_ptr() as u32));
         }
 
         // ----- Select priority levels ----- //

hal/src/dmac/transfer.rs

@@ -648,7 +648,7 @@ where
     }
 
     /// Modify a completed transfer with a new `destination`, then restart.
-
+    ///
     /// Returns a Result containing the destination from the
     /// completed transfer. Returns `Err(_)` if the buffer lengths are
     /// mismatched or if the previous transfer has not yet completed.
@@ -673,7 +673,7 @@ where
     }
 
     /// Modify a completed transfer with a new `source`, then restart.
-
+    ///
     /// Returns a Result containing the source from the
     /// completed transfer. Returns `Err(_)` if the buffer lengths are
     /// mismatched or if the previous transfer has not yet completed.