On 10-06-21, 15:22, Arnd Bergmann wrote: > Can you give an example of how this would be hooked up to other drivers > using those gpios. Can you give an example of how using the "gpio-keys" or > "gpio-leds" drivers in combination with virtio-gpio looks like in the DT? > > Would qemu simply add the required DT properties to the device node that > corresponds to the virtio device in this case? > > From what I can tell, both the mmio and pci variants of virtio can have their > dev->of_node populated, but I don't see the logic in register_virtio_device() > that looks up the of_node of the virtio_device that the of_gpio code then > tries to refer to. To be honest, I haven't tried this yet and I was expecting it to be already taken care of. I was relying on the DTB automatically generated by Qemu to get the driver probed and didn't have a look at it as well. I now understand that it won't be that straight forward. The same must be true for adding an i2c device to an i2c bus over virtio (The way I tested that earlier was by using the sysfs file to add a device to a bus). This may be something lacking generally for virtio-pci thing, not sure though. -- viresh _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
