1 files changed, 7 insertions, 0 deletions
diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs
index f4b617c570be..ed889f079cab 100644
--- a/rust/kernel/platform.rs
+++ b/rust/kernel/platform.rs
@@ -19,6 +19,7 @@ use crate::{
 
 use core::{
     marker::PhantomData,
+    mem::offset_of,
     ptr::{addr_of_mut, NonNull},
 };
 
@@ -287,6 +288,12 @@ impl Device<Bound> {
     }
 }
 
+// SAFETY: `platform::Device` is a transparent wrapper of `struct platform_device`.
+// The offset is guaranteed to point to a valid device field inside `platform::Device`.
+unsafe impl<Ctx: device::DeviceContext> device::AsBusDevice<Ctx> for Device<Ctx> {
+    const OFFSET: usize = offset_of!(bindings::platform_device, dev);
+}
+
 macro_rules! define_irq_accessor_by_index {
     (
         $(#[$meta:meta])* $fn_name:ident,