From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from avon.wwwdotorg.org ([70.85.31.133]:54384 "EHLO avon.wwwdotorg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751420AbcDRQuT (ORCPT ); Mon, 18 Apr 2016 12:50:19 -0400 Subject: Re: [PATCH v5 1/2] dt-bindings: pci: tegra: Update for per-lane PHYs To: Thierry Reding , Bjorn Helgaas References: <1460991105-22861-1-git-send-email-thierry.reding@gmail.com> Cc: Alexandre Courbot , linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org From: Stephen Warren Message-ID: <57151048.2090806@wwwdotorg.org> Date: Mon, 18 Apr 2016 10:50:16 -0600 MIME-Version: 1.0 In-Reply-To: <1460991105-22861-1-git-send-email-thierry.reding@gmail.com> Content-Type: text/plain; charset=windows-1252; format=flowed Sender: linux-pci-owner@vger.kernel.org List-ID: On 04/18/2016 08:51 AM, Thierry Reding wrote: > From: Thierry Reding > > The XUSB pad controller allows PCIe lanes to be controlled individually, > providing fine-grained control over their power state. Previous attempts > at describing the XUSB pad controller in DT had erroneously assumed that > all PCIe lanes were driven by the same PHY, and hence the PCI host > controller would reference only a single PHY. > > Moving to a representation of per-lane PHYs requires that the operating > system driver for the PCI host controller have access to the set of PHY > devices that make up the connection of each root port in order to power > up and down all of the lanes as necessary. The series, Acked-by: Stephen Warren