linux-kernel - Re: [PATCH V6 14/15] cpufreq: Add Rust based cpufreq-dt driver

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Message-ID: <2025010707-repurpose-clapped-0d22@gregkh>
Date: Tue, 7 Jan 2025 13:04:48 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Viresh Kumar <viresh.kumar@...aro.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
	Danilo Krummrich <dakr@...hat.com>, Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	linux-pm@...r.kernel.org,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
	rust-for-linux@...r.kernel.org,
	Manos Pitsidianakis <manos.pitsidianakis@...aro.org>,
	Erik Schilling <erik.schilling@...aro.org>,
	Alex Bennée <alex.bennee@...aro.org>,
	Joakim Bech <joakim.bech@...aro.org>, Rob Herring <robh@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V6 14/15] cpufreq: Add Rust based cpufreq-dt driver

On Tue, Jan 07, 2025 at 04:51:47PM +0530, Viresh Kumar wrote:
> +impl platform::Driver for CPUFreqDTDriver {
> +    type IdInfo = ();
> +    const OF_ID_TABLE: Option<of::IdTable<Self::IdInfo>> = Some(&OF_TABLE);
> +
> +    fn probe(pdev: &mut platform::Device, _id_info: Option<&Self::IdInfo>) -> Result<Pin<KBox<Self>>> {
> +        cpufreq::Registration::<CPUFreqDTDriver>::new_foreign_owned(
> +            pdev.as_ref(),
> +            c_str!("cpufreq-dt"),
> +            (),
> +            cpufreq::flags::NEED_INITIAL_FREQ_CHECK | cpufreq::flags::IS_COOLING_DEV,
> +            true,
> +        )?;
> +
> +        pr_info!("CPUFreq DT driver registered\n");

When drivers work properly, they are quiet.  Please don't make us have
to go and remove lines like this from new drivers being added to the
tree like we did for older drivers in the past :(

thanks,

greg k-h