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From: =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= <zajec5@gmail.com>
Date: Mon, 21 Nov 2016 08:57:38 +0100
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Subject: Re: [PATCH V2] usb: xhci: add support for performing fake doorbell
To: Mathias Nyman <mathias.nyman@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Hauke Mehrtens <hauke@hauke-m.de>, Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= <rafal@milecki.pl>,
        Florian Fainelli <f.fainelli@gmail.com>
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Hi Mathias,

On 17 October 2016 at 22:30, Rafał Miłecki <zajec5@gmail.com> wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
>
> Broadcom's Northstar XHCI controllers seem to need a special start
> procedure to work correctly. There isn't any official documentation of
> this, the problem is that controller doesn't detect any connected
> devices with default setup. Moreover connecting USB device to controller
> that doesn't run properly can cause SoC's watchdog issues.
>
> A workaround that was successfully tested on multiple devices is to
> perform a fake doorbell. This patch adds code for doing this and enables
> it on BCM4708 family.
>
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
> ---
> V2: Enable quirk for brcm,bcm4708 machines instead of adding separated binding
>     for it. Thanks Rob for your comment on this.

Do you think you can pick & push this one? V2 follows Rob's suggestion
and he has some DT knowledge for sure, so I guess it should be OK.