linux-kernel - Re: [PATCH] usb: xhci-plat: Enable USB 2.0 hardware LPM support for platform xHCs

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Message-ID: <CAODwPW99gLBtNQD=UyPq9DqY0TtNubR_7e+FymkfO5u2+et++Q@mail.gmail.com>
Date:	Wed, 21 Aug 2013 21:22:19 -0700
From:	Julius Werner <jwerner@...omium.org>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Cc:	Julius Werner <jwerner@...omium.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Benson Leung <bleung@...omium.org>,
	Felipe Balbi <balbi@...com>, mathias.nyman@...ux.intel.com
Subject: Re: [PATCH] usb: xhci-plat: Enable USB 2.0 hardware LPM support for
 platform xHCs

> You need the USB 2.0 spec errata from 2011-11 that describes the changes
> made for BESL as well.  It's in the USB2-LPM-Errata-final.pdf and
> USB2_LinkPowerMangement_ECN[final].pdf files in this zip file:
>
> http://www.usb.org/developers/docs/usb_20_070113.zip
>
> I agree though, it's all a confusing mess for documentation on USB 2.0
> Link PM.

Thanks, I hadn't found that first one yet. Do you also have a link for
the updated XHCI specification or a separate erratum document
describing the PORTHLPMC register referenced in the BESL patches (they
don't exist on DWC3, but I'm still curious)?
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