[RFC][PATCH 0/2 v2] dwc2 fixes for HiKey

From: John Stultz
Date: Thu Oct 20 2016 - 00:14:52 EST

I wanted to send out two patches we're using on the dwc2
driver in order to make HiKey function.

The first is seemingly just a bug fix we ran into when
changing modes while the bus was auto-suspended.

The second is a little more interesting as it works around
a limitation of the the device in that it can't handle split
transactions, so the usb speed but be lowered and raised
manually when full-speed devices come and go.

I wanted to send these out for further review and consideration.

Changes in v2:
* Fix build issue reported by kbuildbot
* Rework to avoid using new dts entry suggested by RobH
* Further tweaks from Chen Yu to try to address comments from
John Youn
* Further simplified logic

Feedback would be greatly appreciated!


Cc: Wei Xu <xuwei5@xxxxxxxxxxxxx>
Cc: Guodong Xu <guodong.xu@xxxxxxxxxx>
Cc: Amit Pundir <amit.pundir@xxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: John Youn <johnyoun@xxxxxxxxxxxx>
Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
Cc: Chen Yu <chenyu56@xxxxxxxxxx>

Chen Yu (2):
usb: dwc2: Force port resume on switching to device mode
usb: dwc2: Add a quirk to allow speed negotiation for Hisilicon Hi6220

drivers/usb/dwc2/core.h | 6 ++++
drivers/usb/dwc2/hcd.c | 69 +++++++++++++++++++++++++++++++++++++++++++++
drivers/usb/dwc2/platform.c | 1 +
3 files changed, 76 insertions(+)