From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EC1423C4569; Fri, 20 Mar 2026 14:45:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774017948; cv=none; b=VnmWYNyTqotaB0rmSH1RqU6DCx0myF6j+qifxPly38KxqcyOsHsaiwKlHuPS7b9uUMZecbvxVYgJoRYj8c7uQalLHHekO0NwgTW1eSIHGKb2hyhvPDeWVfBgkDqcmmMnn7xKoynSkcCxauoDnLZ8njZnHML2BjqZIxB7As0XYgg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774017948; c=relaxed/simple; bh=qBa55GlxA29pRQ/jYvrAaZksNOPxLN72XF9M10MlWlI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mEW7z1uStFE0TFQusQW6O6bKYs95IIn5M96iuroww9dKhbdTOGljneEUQ+opo0fEriq01XQvrt472F+ZArkF1qxC8e0EG+4Rg3fxkUIdMngssUzyTCeaYrPflEwjWsdT8TbI6q2EPnsQqTDW+RWBmteUMXZfc2oYUvkLMoj2WJg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=YMu2+JTF; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="YMu2+JTF" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=zkkFxBKoL0Oafe+OXBoXrA0rys94DPf2mbkJ030SJKA=; b=YMu2+JTFYiwkNNmfXzc5QT0AFa XgHEjMBV4PyHyZYCYYimrHXoPH5HutN5pvlG5GFh9WtULnU5K6Sjh4ZLOvPV33aU5/5eqUtR3KxA4 LP3G++TTfL6i+CTJ6e6F9GvR6nIkhuUM/qltvLCM/3VAvka8h2G2zmYcXYUXxN15GjCPMKoxreOjf JIVtG6a1w3ugStzWc/uP0j7euB0NYniAbwD84RZmTuan6wwv6oTEN8CitXSVigmsQJHSRFF81v5ke 4SRrimN/19kavH+E84ye0sg/hH9ratpJ0n+K085WeOPqW5FHdN57ZyexR16pysJ2v+KCBoCozwQ6s 7VSKMScQ==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:46618) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1w3b6U-000000006AJ-15Xu; Fri, 20 Mar 2026 14:45:34 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1w3b6R-000000000u4-2REG; Fri, 20 Mar 2026 14:45:31 +0000 Date: Fri, 20 Mar 2026 14:45:31 +0000 From: "Russell King (Oracle)" To: Romain Gantois Cc: Mark Brown , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , Heiner Kallweit , Liam Girdwood , Maxime Chevallier , Thomas Petazzoni , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next 2/2] net: sfp: manage receiver and transmitter regulators Message-ID: References: <20260303-sfp-regulators-v1-0-7101ae34cb84@bootlin.com> <6022954.DvuYhMxLoT@fw-rgant> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6022954.DvuYhMxLoT@fw-rgant> Sender: Russell King (Oracle) On Fri, Mar 20, 2026 at 10:39:10AM +0100, Romain Gantois wrote: > Originally, I implemented a runtime PM support in the SFP core. This allowed > to cut power to the cages when the attached network interface was down, > thereby saving power. Have you measured how much power is saved by this? -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!