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Wed, 14 Jan 2026 22:15:41 -0800 (PST) Date: Thu, 15 Jan 2026 14:15:37 +0800 From: Kuan-Wei Chiu To: Daniel Palmer Cc: geert@linux-m68k.org, sre@kernel.org, jserv@ccns.ncku.edu.tw, eleanor15x@gmail.com, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-pm@vger.kernel.org Subject: Re: [PATCH 1/2] power: reset: Add QEMU virt-ctrl driver Message-ID: References: <20260112182258.1851769-1-visitorckw@gmail.com> <20260112182258.1851769-2-visitorckw@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Hi Daniel, On Wed, Jan 14, 2026 at 07:01:58PM +0900, Daniel Palmer wrote: > Hi Kuan-Wei, > > On Tue, 13 Jan 2026 at 03:27, Kuan-Wei Chiu wrote: > > > > Add a new driver for the 'virt-ctrl' device found on QEMU virt machines > > (e.g. m68k). This device provides a simple interface for system reset > > and power off [1]. > > > > This driver registers a restart handler for system reboot and sets the > > global pm_power_off callback for system shutdown. It is designed to be > > generic and can be reused by other architectures utilizing this QEMU > > device. > > > > Link: https://gitlab.com/qemu-project/qemu/-/blob/v10.2.0/hw/misc/virt_ctrl.c [1] > > Signed-off-by: Kuan-Wei Chiu > > FWIW: I have a driver for this in my "m68k with devicetree" tree. As > far as I could tell the virt_ctrl thing in QEMU might get more > features aside from power control. > So I made it a misc device instead. Thanks for the note. Just out of curious, are there currently specific plans to add non-power features to virt_ctrl? If new features are added, shouldn't they be exposed via separate drivers in their respective subsystems, rather than consolidating everything into a misc driver? Regards, Kuan-Wei