From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752784AbdAUAai (ORCPT ); Fri, 20 Jan 2017 19:30:38 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:47912 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752384AbdAUAae (ORCPT ); Fri, 20 Jan 2017 19:30:34 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3C61A6099A Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=sboyd@codeaurora.org Date: Fri, 20 Jan 2017 16:23:44 -0800 From: Stephen Boyd To: Eric Anholt Cc: Florian Fainelli , Michael Turquette , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Stephen Warren , Lee Jones , bcm-kernel-feedback-list@broadcom.com, linux-clk@vger.kernel.org Subject: Re: [PATCH v2 1/3] clk: bcm2835: Don't rate change PLLs on behalf of DSI PLL dividers. Message-ID: <20170121002344.GM20800@codeaurora.org> References: <20170117203157.23822-1-eric@anholt.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170117203157.23822-1-eric@anholt.net> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/18, Eric Anholt wrote: > Our core PLLs are intended to be configured once and left alone. With > the SET_RATE_PARENT, asking to set the PLLD_DSI1 clock rate would > change PLLD just to get closer to the requested DSI clock, thus > changing PLLD_PER, the UART and ethernet PHY clock rates downstream of > it, and breaking ethernet. > > We *do* want PLLH to change so that PLLH_AUX can be exactly the value > we want, though. Thus, we need to have a per-divider policy of > whether to pass rate changes up. > > Signed-off-by: Eric Anholt > --- Applied to clk-next -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project