From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750999AbdE3SYX (ORCPT ); Tue, 30 May 2017 14:24:23 -0400 Received: from mga14.intel.com ([192.55.52.115]:49908 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750761AbdE3SYW (ORCPT ); Tue, 30 May 2017 14:24:22 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,419,1491289200"; d="scan'208";a="974766312" Reply-To: sathyanarayanan.kuppuswamy@linux.intel.com Subject: Re: [PATCH v1 1/1] mux: mux-intel-usb: Add Intel USB Multiplexer driver References: <84e3fdaf979c070a5c39c7635910fee30c3a8b06.1496104447.git.sathyanarayanan.kuppuswamy@linux.intel.com> To: Andy Shevchenko Cc: Peter Rosin , "Krogerus, Heikki" , "linux-kernel@vger.kernel.org" , Sathyanarayanan Kuppuswamy Natarajan From: sathyanarayanan kuppuswamy Organization: Intel Message-ID: <0e2a3df8-e3b4-28d3-eea9-5ec6a684bf53@linux.intel.com> Date: Tue, 30 May 2017 11:21:00 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Andy, On 05/30/2017 09:20 AM, Andy Shevchenko wrote: > On Tue, May 30, 2017 at 3:47 AM, > wrote: >> From: Kuppuswamy Sathyanarayanan >> >> In some Intel SOCs, a single USB port is shared between USB device and > SoCs > >> host controller and an internal mux is used to control the selection of >> port by host/device controllers. This driver adds support for the USB >> internal mux, and all consumers of this mux can use interfaces provided >> by mux subsytem to control the state of the internal mux. >> +config MUX_INTEL_USB >> + tristate "Intel USB Mux" > It's indeed Intel's IP? Register map to control this MUX comes from Intel vendor defined XHCI extended cap region of SOC. > I would rather believe that it is some 3rd > party known IP block with platform specific soldering. I don't think its platform specific support. I believe its a SOC specific thing( mainly for CHT and APL SoCs). > -- Sathyanarayanan Kuppuswamy Linux kernel developer