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

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Date:   Wed, 19 Oct 2016 21:14:39 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     lkml <linux-kernel@...r.kernel.org>
Cc:     John Stultz <john.stultz@...aro.org>,
        Wei Xu <xuwei5@...ilicon.com>,
        Guodong Xu <guodong.xu@...aro.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        John Youn <johnyoun@...opsys.com>,
        Douglas Anderson <dianders@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, Chen Yu <chenyu56@...wei.com>
Subject: [RFC][PATCH 0/2 v2] dwc2 fixes for HiKey

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!

thanks
-john


Cc: Wei Xu <xuwei5@...ilicon.com>
Cc: Guodong Xu <guodong.xu@...aro.org>
Cc: Amit Pundir <amit.pundir@...aro.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: John Youn <johnyoun@...opsys.com>
Cc: Douglas Anderson <dianders@...omium.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-usb@...r.kernel.org
Cc: Chen Yu <chenyu56@...wei.com>


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(+)

-- 
2.7.4