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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4CA71C624D3 for ; Tue, 1 Sep 2026 14:31:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id: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-Owner; bh=aXjp/EXi0ZgIATNPUvVJ6EllQtEXiudIzx0WzYh/Gy0=; b=Lc538JyHJNSqF7wZBWItDmrwWE BM4R97VauVayCKSxFd6m2xXrLdDYwgVin1KtjN7i8O92sidFo2I5OTAIFQgnLkiLnreAXL3Oo3NYz 1P5Nu0agk5Ixyo1VWVIuYUmeCOg5d1UlCS78dmVzHqKavWcAOnF+8qtl/Rpn3cJQtuI3yu2dfhulv RwxCHR15QN49Nkj4RMYE97+MgJ/l0BW3ULB2fhhfuoxclT0b/kA8D4jBXM3xSOJvtAnlOw5XIJSMe JjqpXKclwMv1/iWKyJfVFXmQLoLgA8gqCFW+4+sJRP7fx9K5GplRpT/ZnbCZiY7cfdtkOehEwk97W 2B5490OA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x1PWO-0000000CLDj-0qBd; Tue, 01 Sep 2026 14:31:32 +0000 Received: from vps0.lunn.ch ([156.67.10.101]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x1PWJ-0000000CLCr-1fsi for linux-arm-kernel@lists.infradead.org; Tue, 01 Sep 2026 14:31:31 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Disposition:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:From:Sender:Reply-To:Subject: Date:Message-ID:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Content-Disposition:In-Reply-To:References; bh=aXjp/EXi0ZgIATNPUvVJ6EllQtEXiudIzx0WzYh/Gy0=; b=MEU3tJ7+SkxV2q7efdUiHkyCBh Zpd75OjCTB3G2CH/Z/0njGMDG/OMSN9Mb4xnOHHXof2iXKYHGgJytaHCje0ndFc0mQ7f84lkarODL GVEh9h4CxBjeQ7VEon7Rgt5KVHnJjIQCYCibHfMfCPXc+OGDGO7rn++fgDvT93bMddb8=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1x1PWA-002MyK-6p; Tue, 01 Sep 2026 16:31:18 +0200 Date: Tue, 1 Sep 2026 16:31:18 +0200 From: Andrew Lunn To: "Gupta, Suraj" Cc: Radhey Shyam Pandey , Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Michal Simek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Russell King , netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH net-next v3 2/6] dt-bindings: net: xlnx,xxv-ethernet: Add Xilinx XXV 10G/25G Ethernet Message-ID: References: <20260831150816.1020883-1-suraj.gupta2@amd.com> <20260831150816.1020883-3-suraj.gupta2@amd.com> <9717ad8d-0117-4320-9d6c-dda6b712ecee@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9717ad8d-0117-4320-9d6c-dda6b712ecee@amd.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260901_073127_463546_6CC4421E X-CRM114-Status: GOOD ( 15.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Sep 01, 2026 at 08:48:18AM +0530, Gupta, Suraj wrote: > > > On 9/1/2026 7:57 AM, Andrew Lunn wrote: > > > + The Xilinx XXV Ethernet Subsystem implements a 10G/25G Ethernet MAC with an > > > + in-core PCS/PMA driving a high-speed serial transceiver. It supports the > > > + 10GBASE-R and 25GBASE-R line rates, with 25G operation following the 25G > > > + Ethernet Consortium specification. It has no external MDIO PHY > > > > What about MDIO bus? > > > > Andrew > > The 10G/25G (XXV) Ethernet Subsystem IP does not provide an MDIO master. O.K. Please change the wording to make that clear. There are plenty to 10G PHYs available, but it seems like you do not consider that a use case. Has the MDIO bus master been replaced with I2C? I assume you intend this device to be paired by an SFP cage, so an I2C bus will be required. Is that a different IP which needs to be licensed? > The contents of the appropriate MDIO registers are available in the IP control & > status registers. What does that mean? Andrew