On 14-07-21, 23:07, Arnd Bergmann wrote: > On Wed, Jul 14, 2021 at 5:43 PM Rob Herring <robh+dt@xxxxxxxxxx> wrote: > > I guess it comes down to is 'virtio,mmio' providing a bus or is it > > just a device? I guess a bus (so 2 nodes) does make sense here. > > 'virtio,mmio' defines how you access/discover the virtio queues (the > > bus) and the functional device (i2c, gpio, iommu, etc.) is accessed > > via the virtio queues. > > It's not really a bus since there is only ever one device behind it. > A better analogy would be your 'serdev' framework: You could > have a 8250 or a pl011 uart, and behind that have a mouse, GPS > receiver or bluetooth dongle. > > In Documentation/devicetree/bindings/serial/serial.yaml, you also > have two nodes for a single device, so we could follow that > example. So two device nodes is final then ? Pretty much like how this patchset did it already ? I need to get rid of reg thing and use "virtio,DID" though. -- viresh
