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From: "Rafael J. Wysocki" <>
To: Josh Triplett <>
Cc: "Rafael J. Wysocki" <>,
	ACPI Devel Maling List <>,
	Arjan van de Ven <>,
	Linux Kernel Mailing List <>
Subject: Re: [PATCH 0/2] ACPI: Tiny power button driver
Date: Thu, 13 Feb 2020 23:43:12 +0100
Message-ID: <> (raw)
In-Reply-To: <>

On Wed, Feb 12, 2020 at 12:36 AM Josh Triplett <> wrote:
> Virtual machines often use an ACPI power button event to tell the
> machine to shut down gracefully.
> Provide an extremely lightweight "tiny power button" driver to handle
> this event by signaling init directly, rather than running a separate
> daemon (such as acpid or systemd-logind) that adds to startup time and
> VM image complexity.
> I originally proposed a change to the ACPI power button driver to
> introduce an optional path to signal init, but Rafael expressed a
> preference to have this as a separate, mutually exclusive driver
> instead. The result did come out much simpler, conceptually, with the
> added benefit of being able to disable CONFIG_INPUT entirely for a
> kernel that exclusively targets cloud/VM systems.
> The first patch in the series just moves HID definitions to
> acpi/button.h in preparation for sharing them with the tiny-power-button
> driver. The second patch provides the driver itself.
> Josh Triplett (2):
>   acpi: button: move HIDs to acpi/button.h
>   acpi: Add new tiny-power-button driver to directly signal init

Applied as 5.7 material, thanks!

      parent reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11 23:36 Josh Triplett
2020-02-11 23:37 ` [PATCH 1/2] ACPI: button: move HIDs to acpi/button.h Josh Triplett
2020-02-11 23:38 ` [PATCH 2/2] ACPI: Add new tiny-power-button driver to directly signal init Josh Triplett
2020-02-13 22:43 ` Rafael J. Wysocki [this message]

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