Re: [PATCH v5 3/4] rust: clk: add devres-managed clks

"Alexandre Courbot" <[email protected]> Mon, 03 Aug 2026 12:57:57 +0900
Newsgroups org.kernel.vger.linux-pwm,org.freedesktop.lists.dri-devel,org.infradead.lists.linux-riscv,org.kernel.vger.linux-clk,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pm,org.kernel.vger.rust-for-linux
Message-ID <[email protected]>
On Mon Aug 3, 2026 at 3:34 AM JST, Gary Guo wrote:
> On Mon Jul 6, 2026 at 3:37 PM BST, Daniel Almeida wrote:
>> The clk API allows fine-grained control, but some drivers might be
>> more interested in a "set and forget" API.
>>
>> Expand the current API to support this. The clock will automatically be
>> disabled, unprepared and freed when the device is unbound from the bus
>> without further intervention by the driver.
>
> Drivers could just put the enabled clock into their driver data.
>
> Given the general shift from devres to lifetime-scoped device resources, =
do we
> still have a need for this?

This mimics what `Regulator` does; back then it was merged with quite
some consensus [1].

IIRC the justification for having this was that it's a nice
fire-and-forget interface for those cases where you don't even want the
driver to have a way to touch the resource after acquiring it, and it
also ensures that the resource is dropped at unbind time even if the driver
data survives it for some reason (for instance, DRM open fds?).

[1] https://lore.kernel.org/all/20250910-regulator-remove-dynamic-v3-2-07af=
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