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Date: Mon, 19 Oct 2026 14:19:08 +0200
From: Beata Michalska <beata.michalska@arm.com>
To: Alice Ryhl <aliceryhl@google.com>
Cc: ojeda@kernel.org, dakr@kernel.org, gregkh@linuxfoundation.org,
	rafael@kernel.org, boqun@kernel.org, gary@garyguo.net,
	bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org,
	tmgross@umich.edu, daniel.almeida@collabora.com,
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	rust-for-linux@vger.kernel.org, driver-core@lists.linux.dev,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH v4 2/3] rust: platform: wire runtime PM callbacks
Message-ID: <atYKvHQm9qJ9wY-e@arm.com>
References: <20261005133857.1572243-1-beata.michalska@arm.com>
 <20261005133857.1572243-3-beata.michalska@arm.com>
 <20261016121230.3724323-2-aliceryhl@google.com>
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In-Reply-To: <20261016121230.3724323-2-aliceryhl@google.com>

On Fri, Oct 16, 2026 at 12:12:30PM +0000, Alice Ryhl wrote:
> On Mon, Oct 05, 2026 at 03:37:40PM +0200, Beata Michalska wrote:
> > @@ -223,6 +225,14 @@ pub trait Driver {
> >      /// The table of ACPI device ids supported by the driver.
> >      const ACPI_ID_TABLE: Option<acpi::IdTable<Self::IdInfo>> = None;
> >  
> > +    /// Provides driver's PM callbacks, if any.
> > +    fn dev_pm_ops() -> Option<crate::pm::DevPMOpsRef<'static, Adapter<Self>>>
> > +    where
> > +        Self: Sized,
> > +    {
> > +        None
> > +    }
> 
> Since `DevPMOps::pm_ops()` is a `const fn`, can this be an associated constant
> `const DEV_PM_OPS: Option<crate::pm::DevPMOpsRef<'static, Adapter<Self>>> = None;`
> to match `OF_ID_TABLE` and `ACPI_ID_TABLE` right above it?
>
It can, as long as no one would mind making the Driver trait sized.

---
BR
Beata
> Alice