linux-kernel - Re: [PATCH V10 14/15] rust: opp: Extend OPP abstractions with cpufreq support

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Message-ID: <Z_9v24SghlIhT62r@pollux>
Date: Wed, 16 Apr 2025 10:52:43 +0200
From: Danilo Krummrich <dakr@...nel.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>,
	Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
	Stephen Boyd <sboyd@...nel.org>, 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>,
	rust-for-linux@...r.kernel.org,
	Manos Pitsidianakis <manos.pitsidianakis@...aro.org>,
	Alex Bennée <alex.bennee@...aro.org>,
	Joakim Bech <joakim.bech@...aro.org>, Rob Herring <robh@...nel.org>,
	Yury Norov <yury.norov@...il.com>, Burak Emir <bqe@...gle.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Russell King <linux@...linux.org.uk>, linux-clk@...r.kernel.org,
	Michael Turquette <mturquette@...libre.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V10 14/15] rust: opp: Extend OPP abstractions with
 cpufreq support

On Wed, Apr 16, 2025 at 12:09:31PM +0530, Viresh Kumar wrote:
> Extend the OPP abstractions to include support for interacting with the
> cpufreq core, including the ability to retrieve frequency tables from
> OPP table.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>  rust/kernel/opp.rs | 67 ++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 67 insertions(+)
> 
> diff --git a/rust/kernel/opp.rs b/rust/kernel/opp.rs
> index 44e11808793a..734be8b6d0ef 100644
> --- a/rust/kernel/opp.rs
> +++ b/rust/kernel/opp.rs
> @@ -19,6 +19,12 @@
>      types::{ARef, AlwaysRefCounted, Opaque},
>  };
>  
> +#[cfg(CONFIG_CPU_FREQ)]

This config is needed quite often, it probably makes sense to move this code in
its own Rust module, i.e.:

	#[cfg(CONFIG_CPU_FREQ)]
	pub mod freq;