[PATCH v3 0/2] Add devicetree bindings and maintainer for spi-virtio

[Francesco Valla <francesco@valla.it>]

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 upstreamed - see [2]).

On top of that, I added myself as maintainer for the spi-virtio driver,
since the former maintainer's e-mail bounces back and its owner (Haixu
Cui) did not update it after changing employment.

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 <francesco@valla.it>
---
Changes in v3:
- Add Francesco as Maintainer of the spi-virtio driver (instead of
  Reviewer) as replacement for the former maintainer (Haixu Cui).
- Link to v2: https://patch.msgid.link/20261027-spi-virtio-bindings-v2-0-67927b24b9d4@valla.it

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

---
Francesco Valla (2):
      dt-bindings: spi: add spi-virtio
      MAINTAINERS: replace spi-virtio maintainer

 .../devicetree/bindings/spi/spi-virtio.yaml        | 46 ++++++++++++++++++++++
 MAINTAINERS                                        |  3 +-
 2 files changed, 48 insertions(+), 1 deletion(-)
---
base-commit: d135ab453a7400a34930bdda1ef4bdc8acfac80e
change-id: 20260927-spi-virtio-bindings-f4e350b2709a

Best regards,
--  
Francesco Valla <francesco@valla.it>