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Date: Sun, 15 Mar 2026 11:57:43 +0100
Message-Id: <DH3AW9U5DIQB.UIRWIA28IER8@kernel.org>
Subject: Re: [PATCH v9 08/10] rust: io: introduce `write_reg` and
 `LocatedRegister`
Cc: "Gary Guo" <gary@garyguo.net>, "Alice Ryhl" <aliceryhl@google.com>,
 "Daniel Almeida" <daniel.almeida@collabora.com>, "Miguel Ojeda"
 <ojeda@kernel.org>, =?utf-8?q?Bj=C3=B6rn_Roy_Baron?=
 <bjorn3_gh@protonmail.com>, "Benno Lossin" <lossin@kernel.org>, "Andreas
 Hindborg" <a.hindborg@kernel.org>, "Trevor Gross" <tmgross@umich.edu>,
 "Boqun Feng" <boqun@kernel.org>, "Yury Norov" <yury.norov@gmail.com>, "John
 Hubbard" <jhubbard@nvidia.com>, "Alistair Popple" <apopple@nvidia.com>,
 "Joel Fernandes" <joelagnelf@nvidia.com>, "Timur Tabi" <ttabi@nvidia.com>,
 "Edwin Peer" <epeer@nvidia.com>, "Eliot Courtney" <ecourtney@nvidia.com>,
 "Dirk Behme" <dirk.behme@de.bosch.com>, "Steven Price"
 <steven.price@arm.com>, <rust-for-linux@vger.kernel.org>,
 <linux-kernel@vger.kernel.org>
To: "Alexandre Courbot" <acourbot@nvidia.com>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260314-register-v9-0-86805b2f7e9d@nvidia.com>
 <20260314-register-v9-8-86805b2f7e9d@nvidia.com>
 <DH2K2VEN94JH.3K1WTNSTYEUSU@garyguo.net>
 <DH33ISJP9GZF.29RJURXJDUY9C@nvidia.com>
In-Reply-To: <DH33ISJP9GZF.29RJURXJDUY9C@nvidia.com>

On Sun Mar 15, 2026 at 6:10 AM CET, Alexandre Courbot wrote:
> What is wrong with the example? It demonstrates how we can do a FIFO
> register with the current macro.

FIFO registers are not a go-to example for write_reg() and try_write_reg(),=
 as
the API will change. It is better to choose an example that remains valid.

> I was thinking that we can update this example once we have the right
> support, but in the meantime this looks useful to me.

That'd be fine to do somewhere else, but changing the example of write_reg(=
) and
try_write_reg() to

	io.write(FIFO_OUT, 10)

later on would not make much sense.