Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753731Ab3HVFLx (ORCPT ); Thu, 22 Aug 2013 01:11:53 -0400 Received: from us02smtp2.synopsys.com ([198.182.60.77]:42801 "EHLO alvesta.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753714Ab3HVFLv convert rfc822-to-8bit (ORCPT ); Thu, 22 Aug 2013 01:11:51 -0400 From: Paul Zimmerman To: Julius Werner , Sarah Sharp CC: LKML , "linux-usb@vger.kernel.org" , Greg Kroah-Hartman , Vincent Palatin , Benson Leung , Felipe Balbi , "mathias.nyman@linux.intel.com" Subject: RE: [PATCH] usb: xhci-plat: Enable USB 2.0 hardware LPM support for platform xHCs Thread-Topic: [PATCH] usb: xhci-plat: Enable USB 2.0 hardware LPM support for platform xHCs Thread-Index: AQHOnfwYI9Np33Plqkq7vUNbfD4u75mgdUEAgAAzMICAADKpAIAAPKeA//+VVhA= Date: Thu, 22 Aug 2013 05:11:49 +0000 Message-ID: References: <1377040909-18428-1-git-send-email-jwerner@chromium.org> <20130821184042.GC3577@xanatos> <20130822004514.GB19747@xanatos> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.9.64.240] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1224 Lines: 32 > From: Julius Werner > Sent: Wednesday, August 21, 2013 9:22 PM > > > 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)? Just to set the record straight :) The PORTHLPMC registers do exist on DWC3, starting with the 1.90a version of the core or thereabouts. They only supported the HIRD flavor of LPM, though. Only fairly recently has support for BESL been added, around version 2.41a or so. -- Paul -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/