On 14-07-21, 23:07, Arnd Bergmann wrote:
On Wed, Jul 14, 2021 at 5:43 PM Rob Herring [off-list ref] wrote:
quoted
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
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