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/[email protected]/ > > Signed-off-by: Francesco Valla <[email protected]> > ---
I hope this can be merged through the devicetree maintainers, I have no idea. MAINTAINERS changes needs an ack from existing maintainers, of course. > 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/[email protected] > > To: Haixu Cui <[email protected]> > To: Francesco Valla <[email protected]> > To: Mark Brown <[email protected]> > To: Rob Herring <[email protected]> > To: Krzysztof Kozlowski <[email protected]> > To: Conor Dooley <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > > --- > 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 <[email protected]>
