From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Stuge Subject: Re: [RFC PATCH] usb/acpi: Add support usb port power off mechanism for device fixed on the motherboard Date: Tue, 15 May 2012 06:57:46 +0200 Message-ID: <20120515045746.31559.qmail@stuge.se> References: <4FAD3A51.4010803@intel.com> <20120511183543.GF7920@kroah.com> <20120511201124.GF18754@xanatos> <20120511210940.8350.qmail@stuge.se> <20120515014726.GL18754@xanatos> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from foo.stuge.se ([212.116.89.98]:60510 "HELO foo.stuge.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751892Ab2EOE5s (ORCPT ); Tue, 15 May 2012 00:57:48 -0400 Content-Disposition: inline In-Reply-To: <20120515014726.GL18754@xanatos> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Sarah Sharp Cc: Greg KH , Alan Stern , Lan Tianyu , lenb@kernel.org, linux-acpi@vger.kernel.org, linux-usb@vger.kernel.org Sarah Sharp wrote: > > > Theoretically there's no maximum number for xHCI root ports > > > > Hm? Please clarify this? > > > > HCSPARAMS1 MaxPorts is 8 bits and "Valid values are in the range of > > 1h to FFh." > > Sorry, yes, you're correct, the maximum number of ports for xHCI is 255. Thanks for confirming! > I was just trying to point out that it's possible that xHCI hosts will > have a much larger number of USB ports than what we've previously seen > on EHCI host controllers. Yep, absolutely. I was just worried that I had missed something. //Peter