[RFC usb-next v5 1/3] dt-bindings: usb: add the documentation for USB root-hub

Arnd Bergmann arnd at arndb.de
Mon Oct 9 03:24:59 PDT 2017

On Sun, Oct 8, 2017 at 11:17 PM, Martin Blumenstingl
<martin.blumenstingl at googlemail.com> wrote:
> A USB root-hub may have several PHYs which need to be configured before
> the root-hub starts working.
> This adds the documentation for such a USB root-hub as well as a hint
> regarding the child-nodes on XHCI controllers which can include the
> roothub.
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl at googlemail.com>
> Acked-by: Rob Herring <robh at kernel.org>

Have you checked that this still works with DT properties on a USB device
that is listed in the DT? A common use-case is to provide the MAC address
of a soldered-down USB-ethernet that lacks its own eeprom, and it seems
you are changing the way the parent devices of that get represented,
so the dev->of_node pointer in the USB device might no longer refer
to the correct device.


More information about the linux-amlogic mailing list