From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754275Ab3JCPYD (ORCPT ); Thu, 3 Oct 2013 11:24:03 -0400 Received: from avon.wwwdotorg.org ([70.85.31.133]:47031 "EHLO avon.wwwdotorg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753648Ab3JCPYB (ORCPT ); Thu, 3 Oct 2013 11:24:01 -0400 Message-ID: <524D8C0B.90707@wwwdotorg.org> Date: Thu, 03 Oct 2013 09:23:55 -0600 From: Stephen Warren User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0 MIME-Version: 1.0 To: Peter De Schrijver CC: Mike Turquette , Prashant Gaikwad , "linux-arm-kernel@lists.infradead.org" , "linux-tegra@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] clk: tegra: PLLE spread spectrum control References: <1380209654-25458-1-git-send-email-pdeschrijver@nvidia.com> <524B28EA.40702@wwwdotorg.org> <20131003105228.GK3973@tbergstrom-lnx.Nvidia.com> In-Reply-To: <20131003105228.GK3973@tbergstrom-lnx.Nvidia.com> X-Enigmail-Version: 1.5.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/03/2013 04:52 AM, Peter De Schrijver wrote: > On Tue, Oct 01, 2013 at 09:56:26PM +0200, Stephen Warren wrote: >> On 09/26/2013 09:34 AM, Peter De Schrijver wrote: >>> Add spread spectrum control for PLLE in Tegra114. >> >> It would be useful to have some description of the end-user-visible >> benefit of this change; why is it useful? > > spread spectrum clocking is a technique to reduce EMI caused by the clock > signal by modulating the frequency with a low frequency signal. This should > reduce interference with eg. Wifi or cellular modems on the same board. Great. The intent of my request was for that information to be included in the patch description.