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 X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8AFF4ECDFD0 for ; Fri, 14 Sep 2018 13:29:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D48C20671 for ; Fri, 14 Sep 2018 13:29:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4D48C20671 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728201AbeINSoQ (ORCPT ); Fri, 14 Sep 2018 14:44:16 -0400 Received: from mail.bootlin.com ([62.4.15.54]:43124 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727611AbeINSoP (ORCPT ); Fri, 14 Sep 2018 14:44:15 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id C2B5F206FF; Fri, 14 Sep 2018 15:29:41 +0200 (CEST) Received: from qschulz (AAubervilliers-681-1-99-10.w90-88.abo.wanadoo.fr [90.88.4.10]) by mail.bootlin.com (Postfix) with ESMTPSA id 7215B206EE; Fri, 14 Sep 2018 15:29:31 +0200 (CEST) Date: Fri, 14 Sep 2018 15:29:30 +0200 From: Quentin Schulz To: Andrew Lunn Cc: alexandre.belloni@bootlin.com, ralf@linux-mips.org, paul.burton@mips.com, jhogan@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, davem@davemloft.net, f.fainelli@gmail.com, allan.nielsen@microchip.com, linux-mips@linux-mips.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, thomas.petazzoni@bootlin.com, antoine.tenart@bootlin.com Subject: Re: [PATCH net-next 2/7] net: phy: mscc: add support for VSC8584 PHY Message-ID: <20180914132930.fphdm3dm2incetbq@qschulz> References: <20180914131846.GG14865@lunn.ch> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="w2cfxpmyvzbuyq6t" Content-Disposition: inline In-Reply-To: <20180914131846.GG14865@lunn.ch> User-Agent: NeoMutt/20171215 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --w2cfxpmyvzbuyq6t Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Andrew, On Fri, Sep 14, 2018 at 03:18:46PM +0200, Andrew Lunn wrote: > > Most of the init sequence of a PHY of the package is common to all PHYs > > in the package, thus we use the SMI broadcast feature which enables us > > to propagate a write in one register of one PHY to all PHYs in the > > package. >=20 > Hi Quinten >=20 > Could you say a bit more about the broadcast. Does the SMI broadcast > go to all PHY everywhere on an MDIO bus, or only all PHYs within one > package? I'm just thinking about the case you need two of these > packages to cover 8 switch ports. >=20 Ah sorry, that wasn't very explicit. That's a feature on the PHY side so my wildest guess is that it wouldn't impact any other PHY outside of this package. Affecting any other PHY on the bus is counter-intuitive to me but I'll ask the HW engineers for confirmation. Thanks, Quentin --w2cfxpmyvzbuyq6t Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEXeEYjDsJh38OoyMzhLiadT7g8aMFAlubt7oACgkQhLiadT7g 8aMP+g/+L2iC+PhfMSiTn/swWLrAkWxgR7/1NH4N7Kb5wIBJPN659JJnEUHtnQQd HRu4vqlMEu9c6T6B6fo23w8xHvKSTtQdcPtKgX2AbtwvuNelfPTUtOVQYbdAzqKB ZG0TKTL5BIFn49N9vwf9SpvVKFJ4e3+XU2/OMAO/PiG3hTwlcqH3JX5TXzDlBSUM 1w+MS/UMzqTRVNnXfCvyGk6/xtAcOIu/GCxCGQviP6iZWtewVrnowqY94FURE8h4 eF4Mc8udp3OLVUOh5Ki3DtWY42oRTG9KPqwDXzxKIgZ4V91n1USVOE8kPIZrvbW8 6N61KHuJTlwZfdcpl5VdUqkOfVfpclnCkJOQkmySZcn9OEGHNxAa/IHN+1eX6wOX zbD0i7IccvHdjIfoAmQwpO5kO72x3XFaJhcZEq87LBpdcY6QodUJddqjlUdyeSae BmJN4RhgNi+l3IFFYbOTAQY0o6dTdvSO1W2RzA0//IDeUSXBSirf+dow6vockwf6 cPOjUaq82xJlFzyucsGH1G4Xp6G/sZN1ML3ETnRKLRBIy34dREcfgOE2k5FAtcN4 hzv322g8YR+tuQ7EIXWwxQwM/osiCniaz8Zi7IzJ/aksFJBITLP24rLHEb/xEknL nIOZfQaVOkE02pxyW/qPU7nUe66hnJUAwdcgr/TIk/hoIeKRVUs= =Rb1D -----END PGP SIGNATURE----- --w2cfxpmyvzbuyq6t--