linux-kernel - Re: [PATCH 0/7] Power down serdes lanes and CMUs initially

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Message-ID: <ZFjgVNsyIcLemolS@matsya>
Date:   Mon, 8 May 2023 17:13:16 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Daniel Machon <daniel.machon@...rochip.com>
Cc:     kishon@...nel.org, Steen.Hegelund@...rochip.com,
        UNGLinuxDriver@...rochip.com, joe@...ches.com,
        linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/7] Power down serdes lanes and CMUs initially

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