rust: io: register: remove `Register` trait and cleanup macro

With the removal of relative registers, there are only two type of
registers left, fixed register and register arrays. There is not much
benefit in having a common super trait for them anymore, thus remove it,
and cleanup the macro rules associated with it.

Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://patch.msgid.link/20260901-typed_register-v4-15-5552b1d59525@garyguo.net
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/rust/macros/io/register.rs b/rust/macros/io/register.rs
index 500805aa6b23..5511b8e5b875 100644
--- a/rust/macros/io/register.rs
+++ b/rust/macros/io/register.rs
@@ -225,11 +225,6 @@ pub(crate) fn register(def: RegDef) -> Result<TokenStream> {
                     #[allow(non_camel_case_types)]
                     #(#attrs)* #vis struct #name(#storage) #args
                 );
-
-                impl ::kernel::io::register::Register for #name {
-                    type Base = #base;
-                    const OFFSET: usize = #offset;
-                }
             ));
         }
 
@@ -245,7 +240,10 @@ pub(crate) fn register(def: RegDef) -> Result<TokenStream> {
             ))?,
 
             None => outputs.extend(quote_spanned!(span =>
-                impl ::kernel::io::register::FixedRegister for #name {}
+                impl ::kernel::io::register::FixedRegister for #name {
+                    type Base = #base;
+                    const OFFSET: usize = #offset;
+                }
 
                 #(#attrs)* #vis const #name: ::kernel::io::register::FixedRegisterLoc<#name> =
                     ::kernel::io::register::FixedRegisterLoc::<#name>::new();
@@ -268,6 +266,8 @@ pub(crate) fn register(def: RegDef) -> Result<TokenStream> {
                     impl ::kernel::io::register::Array for #name {}
 
                     impl ::kernel::io::register::RegisterArray for #name {
+                        type Base = #base;
+                        const OFFSET: usize = #offset;
                         const SIZE: usize = #size;
                         const STRIDE: usize = #stride;
                     }