linux-kernel - Re: [PATCH v2 4/5] rust: io: add `register!` macro

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Message-Id: <DFY76PFKFRQI.6RDC2F8DWIXM@nvidia.com>
Date: Mon, 26 Jan 2026 12:23:58 +0900
From: "Alexandre Courbot" <acourbot@...dia.com>
To: "Gary Guo" <gary@...yguo.net>
Cc: "Danilo Krummrich" <dakr@...nel.org>, "Alice Ryhl"
 <aliceryhl@...gle.com>, "Daniel Almeida" <daniel.almeida@...labora.com>,
 "Miguel Ojeda" <ojeda@...nel.org>, "Boqun Feng" <boqun.feng@...il.com>,
 Björn Roy Baron <bjorn3_gh@...tonmail.com>, "Benno Lossin"
 <lossin@...nel.org>, "Andreas Hindborg" <a.hindborg@...nel.org>, "Trevor
 Gross" <tmgross@...ch.edu>, "Yury Norov" <yury.norov@...il.com>, "John
 Hubbard" <jhubbard@...dia.com>, "Alistair Popple" <apopple@...dia.com>,
 "Joel Fernandes" <joelagnelf@...dia.com>, "Timur Tabi" <ttabi@...dia.com>,
 "Edwin Peer" <epeer@...dia.com>, "Eliot Courtney" <ecourtney@...dia.com>,
 "Dirk Behme" <dirk.behme@...bosch.com>, "Steven Price"
 <steven.price@....com>, <rust-for-linux@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/5] rust: io: add `register!` macro

On Wed Jan 21, 2026 at 11:15 PM JST, Gary Guo wrote:
> On Wed Jan 21, 2026 at 7:23 AM GMT, Alexandre Courbot wrote:
>> Add a macro for defining hardware register types with I/O accessors.
>> 
>> Each register field is represented as a `Bounded` of the appropriate bit
>> width, ensuring field values are never silently truncated.
>> 
>> Fields can optionally be converted to/from custom types, either fallibly
>> or infallibly.
>> 
>> The address of registers can be direct, relative, or indexed, supporting
>> most of the patterns in which registers are arranged.
>> 
>> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
>
> It looks like this is still based on the current Io impl. I think with Zhi's new
> Io trait this will look quite different.

Correct. The next version will be rebased on top of it now that it is
merged into `driver-core-next`.