Re: [PATCH] um: virtio_uml: allow probing from devicetree

On Tue, Dec 21, 2021 at 09:48:26PM +0100, Johannes Berg wrote:

On Tue, 2021-12-21 at 10:04 +0100, Vincent Whitchurch wrote:

quoted

Allow the virtio_uml device to be probed from the devicetree so that
sub-devices can be specified using the standard virtio bindings, for
example:

  virtio@1 {
    compatible = "virtio,uml";
    socket-path = "i2c.sock";
    virtio-device-id = <0x22>;

Given this, maybe it should modify
Documentation/devicetree/bindings/virtio/virtio-device.yaml? Or actually
add a new Documentation/devicetree/bindings/virtio/uml.yaml I guess?

+Rob, because I'm not really into any of this.

Also, I'm not even sure we should/need to document the DT bits that are
basically only used for testing in the first place?

I wasn't sure either, but Rob was OK with not documenting some other
bindings which are only used for testing[0], so I assumed that that
applied here too:

 [0] https://lore.kernel.org/all/5baa1ae6.1c69fb81.847f2.3ab1@mx.google.com/ (local) 

Also, DT bindings are supposed to be generic and based on what the
hardware has, but here we have no hardware and something very Linux and
UML-specific.

Code looks good to me.

Thanks!