Re: [PATCH V2] usb: xhci: add support for performing fake doorbell

From: RafaÅ MiÅecki
Date: Mon Nov 21 2016 - 02:57:54 EST

Hi Mathias,

On 17 October 2016 at 22:30, RafaÅ MiÅecki <zajec5@xxxxxxxxx> wrote:
> From: RafaÅ MiÅecki <rafal@xxxxxxxxxx>
> 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: RafaÅ MiÅecki <rafal@xxxxxxxxxx>
> ---
> 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.