linux-kernel - Re: [PATCH v7 1/8] pwm: Expose PWM

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Message-ID: <3zjmaymc3igas3727ztzcz4d3znzvlfz7imutbxyg7msunxgia@vjbi6w6ltpdk>
Date: Thu, 3 Jul 2025 08:39:54 +0200
From: Uwe Kleine-König <ukleinek@...nel.org>
To: Michal Wilczynski <m.wilczynski@...sung.com>
Cc: 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>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, Guo Ren <guoren@...nel.org>, Fu Wei <wefu@...hat.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Alexandre Ghiti <alex@...ti.fr>, Marek Szyprowski <m.szyprowski@...sung.com>, 
	Benno Lossin <lossin@...nel.org>, Michael Turquette <mturquette@...libre.com>, 
	Drew Fustini <fustini@...nel.org>, linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org, 
	rust-for-linux@...r.kernel.org, linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v7 1/8] pwm: Expose PWM_WFHWSIZE in public header

Hello,

On Wed, Jul 02, 2025 at 03:45:29PM +0200, Michal Wilczynski wrote:
> The WFHWSIZE constant defines the maximum size for the hardware-specific
> waveform representation buffer. It is currently local to
> drivers/pwm/core.c, which makes it inaccessible to external tools like
> bindgen.
> 
> Move the constant to include/linux/pwm.h to make it part of the public
> API. As part of this change, rename it to PWM_WFHWSIZE to follow
> standard kernel conventions for namespacing macros in public headers.
> 
> This allows bindgen to automatically generate a corresponding constant
> for the Rust PWM abstractions, ensuring the value remains synchronized
> between the C core and Rust code and preventing future maintenance
> issues.
> 
> Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>

I applied this patch to

https://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux.git pwm/for-next

. I'll send it to go into 6.17-rc1.

Best regards
Uwe

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