Use AtomicBool from core if not using portable-atomic

embedded-hal-bus/src/util.rs

@@ -3,14 +3,19 @@
 #[allow(unused_imports)]
 use core::cell::UnsafeCell;
 
+#[cfg(feature = "portable-atomic")]
+use portable_atomic::AtomicBool;
+#[cfg(not(feature = "portable-atomic"))]
+use core::sync::atomic::AtomicBool;
+
 #[cfg(any(feature = "portable-atomic", target_has_atomic = "8"))]
 /// Cell type used by [`spi::AtomicDevice`](crate::spi::AtomicDevice) and [`i2c::AtomicDevice`](crate::i2c::AtomicDevice).
 ///
 /// To use `AtomicDevice`, you must wrap the bus with this struct, and then
 /// construct multiple `AtomicDevice` instances with references to it.
 pub struct AtomicCell<BUS> {
     pub(crate) bus: UnsafeCell<BUS>,
-    pub(crate) busy: portable_atomic::AtomicBool,
+    pub(crate) busy: AtomicBool,
 }
 #[cfg(any(feature = "portable-atomic", target_has_atomic = "8"))]
 unsafe impl<BUS: Send> Send for AtomicCell<BUS> {}
@@ -23,7 +28,7 @@ impl<BUS> AtomicCell<BUS> {
     pub fn new(bus: BUS) -> Self {
         Self {
             bus: UnsafeCell::new(bus),
-            busy: portable_atomic::AtomicBool::from(false),
+            busy: AtomicBool::from(false),
         }
     }
 }