Re: [PATCH RFC 0/6] Rust Abstractions for PWM subsystem with TH1520 PWM driver

From: "Benno Lossin" <lossin@kernel.org>
To: "Michal Wilczynski" <m.wilczynski@samsung.com>,
	"Drew Fustini" <pdp7pdp7@gmail.com>
Cc: "Uwe Kleine-König" <ukleinek@kernel.org>,
	"Miguel Ojeda" <ojeda@kernel.org>,
	"Alex Gaynor" <alex.gaynor@gmail.com>,
	"Boqun Feng" <boqun.feng@gmail.com>,
	"Gary Guo" <gary@garyguo.net>,
	"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
	"Benno Lossin" <benno.lossin@proton.me>,
	"Andreas Hindborg" <a.hindborg@kernel.org>,
	"Alice Ryhl" <aliceryhl@google.com>,
	"Trevor Gross" <tmgross@umich.edu>,
	"Danilo Krummrich" <dakr@kernel.org>,
	"Drew Fustini" <drew@pdp7.com>, "Guo Ren" <guoren@kernel.org>,
	"Fu Wei" <wefu@redhat.com>, "Rob Herring" <robh@kernel.org>,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	"Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Alexandre Ghiti" <alex@ghiti.fr>,
	"Marek Szyprowski" <m.szyprowski@samsung.com>,
	linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org,
	rust-for-linux@vger.kernel.org, linux-riscv@lists.infradead.org,
	devicetree@vger.kernel.org
Subject: Re: [PATCH RFC 0/6] Rust Abstractions for PWM subsystem with TH1520 PWM driver
Date: Mon, 26 May 2025 11:01:58 +0200	[thread overview]
Message-ID: <DA5YY0YF28GO.3DONTQDLY6VBD@kernel.org> (raw)
In-Reply-To: <b5f4af17-05ef-453d-8f04-283590ae5b87@samsung.com>

On Mon May 26, 2025 at 10:22 AM CEST, Michal Wilczynski wrote:
> On 5/25/25 00:21, Drew Fustini wrote:
>> Thanks for the patch series. It will be great to have PWM working
>> upstream.
>> 
>> I've not built Linux with Rust before, so I'm going through the quick
>> start [1]. I've also never built Linux with LLVM before but clang seems
>> like the best compiler to use for Rust. Are you using LLVM?
>
> Hi Drew,
> You're correct, Clang is the way to go for Rust in the kernel. I also
> followed the official quick start guide. To answer your question
> directly: yes, I'm using LLVM.

Just to let you know, there is an effort to get rustc to work with a gcc
backend rustc_gcc_codegen [1]. And there also is the gccrs project [2]
trying to create a gnu Rust compiler.

[1]: https://rust-for-linux.com/rustc_codegen_gcc
[2]: https://rust-for-linux.com/gccrs

They have made a lot of progress over the last year, so we're hopeful
that they become usable in the near future. But for the moment,
Clang/LLVM is the way to go.

Hope this helps!

---
Cheers,
Benno