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Tue, 27 Oct 2026 06:07:51 -0700 (PDT) Date: Tue, 27 Oct 2026 09:07:47 -0400 From: "Michael S. Tsirkin" To: Francesco Valla Cc: Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Haixu Cui , Jason Wang , Viresh Kumar , Xuan Zhuo , Eugenio =?iso-8859-1?Q?P=E9rez?= , Mathieu Poirier , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev Subject: Re: [PATCH v2 0/2] Add devicetree bindings for spi-virtio Message-ID: <20261027090324-mutt-send-email-mst@kernel.org> References: <20261027-spi-virtio-bindings-v2-0-67927b24b9d4@valla.it> <20261027065001-mutt-send-email-mst@kernel.org> X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: t69L2euf1ZEhcqHHkk7liTb1TVaU8g-YskMYazA8MiU_1793106474 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Oct 27, 2026 at 01:46:35PM +0100, Francesco Valla wrote: > Hello Michael, > > On Tue, Oct 27, 2026 at 06:50:51AM -0400, Michael S. Tsirkin wrote: > > On Tue, Oct 27, 2026 at 08:26:32AM +0100, Francesco Valla wrote: > > > When a virtio transport exposes a non-discoverable bus, the devicetree > > > can be used to declare its child devices (if any) and/or other > > > properties. To allow for that, the virtio framework searches for a node > > > with a suitable compatible in virtio_device_of_init() when registering > > > a device [1]; such compatible takes the form "virtio,deviceXX", where > > > XX is the hexadecimal representation of the virtio device ID as defined > > > by the virtio specification. > > > > > > This patchset thus does not introduce a new functionality, but allows > > > proper validation of nodes tied to spi-virtio devices, aligning SPI to > > > what is already being done for e.g. I2C and GPIO virtio devices. > > > It was sent initially as part of a different patchset [2], but since it > > > complements a functionality that is de-facto already there and is useful > > > beyond that specific use case it was sent separately (also following the > > > maintainer's feedback there to separate it from remoteproc-specific > > > changes). > > > > > > This was tested both with virtio-mmio using qemu-system-aarch64 and with > > > remoteproc-virtio with a Zephyr backend (with relevant remoteproc-virtio > > > parts still not not upstreamed - see [2]). > > > > > > I added myself as reviewer for the spi-virtio driver to be CC'd on any > > > patch involving the new bindings. > > > > > > Thank you! > > > > > > Regards, > > > Francesco > > > > > > [1] https://elixir.bootlin.com/linux/v7.2.8/source/drivers/virtio/virtio.c#L488 > > > [2] https://lore.kernel.org/linux-remoteproc/20260916-remoteproc_virtio_map-v1-0-dac8c5eb4aa9@valla.it/ > > > > > > Signed-off-by: Francesco Valla > > > --- > > > > I hope this can be merged through the devicetree maintainers, > > I have no idea. > > MAINTAINERS changes needs an ack from existing maintainers, of > > course. > > > > This might prove... difficult. My e-mails to the maintainer (Haixu Cui > @quicinc.com) continue to be bounced back by the Qualcomm postmaster > with a RecipientNotFound error. Maybe someone from Qualcomm can give me > a lead on how to contact them? Indeed, so it did for me. Oh that's no good at all. Mark, what's your take? The maintainer is MIA but we have a volunteer maintainer here. As far as I'm concerned Acked-by: Michael S. Tsirkin > > > Changes in v2: > > > - Expanded the commit message to better explain the functionality and > > > the chosen compatible. > > > - Redundant pieces dropped from bindings. > > > - Link to v1: https://patch.msgid.link/20260929-spi-virtio-bindings-v1-0-6a0eef3213b3@valla.it > > > > > > To: Haixu Cui > > > To: Francesco Valla > > > To: Mark Brown > > > To: Rob Herring > > > To: Krzysztof Kozlowski > > > To: Conor Dooley > > > Cc: virtualization@lists.linux.dev > > > Cc: linux-spi@vger.kernel.org > > > Cc: devicetree@vger.kernel.org > > > Cc: linux-kernel@vger.kernel.org > > > > > > --- > > > Francesco Valla (2): > > > dt-bindings: spi: add spi-virtio > > > MAINTAINERS: add Francesco as spi-virtio reviewer > > > > > > .../devicetree/bindings/spi/spi-virtio.yaml | 46 ++++++++++++++++++++++ > > > MAINTAINERS | 2 + > > > 2 files changed, 48 insertions(+) > > > --- > > > base-commit: d135ab453a7400a34930bdda1ef4bdc8acfac80e > > > change-id: 20260927-spi-virtio-bindings-f4e350b2709a > > > > > > Best regards, > > > -- > > > Francesco Valla > > > > Regards, > Francesco