1 files changed, 29 insertions, 0 deletions

diff --git a/embassy-nxp/src/iomuxc.rs b/embassy-nxp/src/iomuxc.rs
new file mode 100644
index 000000000..c015ecbc2
--- /dev/null
+++ b/embassy-nxp/src/iomuxc.rs
@@ -0,0 +1,29 @@
+#![macro_use]
+
+/// An IOMUXC pad.
+///
+/// This trait does not imply that GPIO can be used with this pad. [`Pin`](crate::gpio::Pin) must
+/// also be implemented for GPIO.
+#[allow(private_bounds)]
+pub trait Pad: SealedPad {}
+
+pub(crate) trait SealedPad {
+    /// Address of the pad register for this pad.
+    const PAD: *mut ();
+
+    /// Address of the mux register for this pad.
+    ///
+    /// Some pads do not allow muxing (e.g. ONOFF).
+    const MUX: Option<*mut ()>;
+}
+
+macro_rules! impl_iomuxc_pad {
+    ($name: ident, $pad: expr, $mux: expr) => {
+        impl crate::iomuxc::SealedPad for crate::peripherals::$name {
+            const PAD: *mut () = $pad as *mut ();
+            const MUX: Option<*mut ()> = Some($mux as *mut ());
+        }
+
+        impl crate::iomuxc::Pad for crate::peripherals::$name {}
+    };
+}