Re: [PATCH v3 1/1] USB: core: let USB device know device node

Alan Stern
2016-01-22T19:29:25Z

On Fri, 22 Jan 2016, Arnd Bergmann wrote:

> We just have to decide what to do for non-hub devices that the OF
> specification calls "combined nodes" (device class 0, one configuration,
> one interface) and that, like hubs do not have one of_node per interface
> plus one per device, but only one node.
>
> Should we bind the of_node to the usb_device, the usb_interface or both
> in this case? Doing both might be problematic and would need more
> testing to be sure it works.

The purpose of the of_node would generally be to express requirements
necessary for operating the device, right? Since the device has to be
operational before its interfaces can be known, the of_node should be
bound to the usb_device.

Alan Stern

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