On Wed, Oct 20, 2021 at 01:27:40PM -0700, Matthias Kaehlcke wrote:

Hi Mathias,

On Wed, Oct 20, 2021 at 04:05:37PM +0300, Mathias Nyman wrote:

quoted

If separate devices for controlling onboard hub power is the right solution then
how about creating the onboard hub device in usb_add_hcd() (hcd.c), and
store it in struct usb_hcd.

A bit like how the roothub device is created, or PHYs are tuned.

Sure, that sounds feasible, even better if it's handled in a single place
and different types of controllers don't have to add support separately.

Bear in mind that this would prevent you from working with onboard 
non-root hubs.

Alan Stern