From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11D5AC7EE23 for ; Mon, 8 May 2023 11:44:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236309AbjEHLoS (ORCPT ); Mon, 8 May 2023 07:44:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236254AbjEHLn4 (ORCPT ); Mon, 8 May 2023 07:43:56 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42D1E106EF for ; Mon, 8 May 2023 04:43:21 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1019661782 for ; Mon, 8 May 2023 11:43:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E734CC433A0; Mon, 8 May 2023 11:43:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1683546200; bh=01f3Go1YWZ5fuIRF6yYHIXEN7EeVi5WcswKnPII6Gxc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=L4rq1gttmEtCjLmqaIPKu7Le4ItutJzvCW83HeWYf+2MX5cR+PdcH+7//L1c2Fqrv Wt4xkajZwFbwFhl0Pn9gsYztzmZ2WkceRLzXxjh08QrOTkLydZb1tEOGHSzHNJuAHA qkTdfOuT2YqC0silvowU9qw6/ImUJ1X7K37ixF3J9Q2YG8unWtXsqwAxkVAsavV1Ri RWIE9aF/0L5IjgHW6jn6Oof3dt+vTacZX3gUVdSh2c/i8acwXL9rAEAT9k9UKXMM6i WMF2+pyiT//9uwH6do6TU1M6LCixIxUoRVWsSax7OHlj+/cpoLaYtGmeT0OLmYbKB7 c5qIcyOIjDA0g== Date: Mon, 8 May 2023 17:13:16 +0530 From: Vinod Koul To: Daniel Machon Cc: kishon@kernel.org, Steen.Hegelund@microchip.com, UNGLinuxDriver@microchip.com, joe@perches.com, linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/7] Power down serdes lanes and CMUs initially Message-ID: References: <20230417180335.2787494-1-daniel.machon@microchip.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230417180335.2787494-1-daniel.machon@microchip.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 17-04-23, 20:03, Daniel Machon wrote: > This patch series aims to lower the power consumption of the Sparx5 > switch chip, by configuring optimal quiet mode for serdes lanes, as well > as powering down unused CMUs (Clock Multiplier Unit). Before this series, > serdes lane quiet mode were not optimally configured, and all the CMUs were > powered on by default. This uses needless power. > > Each serdes lane is provided a CMU clock, depending on the serdes mode > and the serdes index. CMUs will now be powered on individually, when > needed. The amount of power saved varies, depending on the port > configuration. As a reference, this change saves about 1W on > sparx5_pcb135 and 2W on sparx5_pcb134. Applied, thanks -- ~Vinod