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Sun, 10 Mar 2019 23:45:40 -0700 Received: from [127.0.0.1] (helo=localhost) by xsj-pvapsmtp01 with smtp (Exim 4.63) (envelope-from ) id 1h3Ego-0005yh-Uh; Sun, 10 Mar 2019 23:45:34 -0700 Received: from xsj-pvapsmtp01 (smtp3.xilinx.com [149.199.38.66]) by xsj-smtp-dlp1.xlnx.xilinx.com (8.13.8/8.13.1) with ESMTP id x2B6jQOo029467; Sun, 10 Mar 2019 23:45:26 -0700 Received: from [172.30.17.111] by xsj-pvapsmtp01 with esmtp (Exim 4.63) (envelope-from ) id 1h3Egf-0005xp-PW; Sun, 10 Mar 2019 23:45:25 -0700 Subject: Re: [PATCH RESEND net] net: phy: xgmiitorgmii: Support generic PHY status read To: Andrew Lunn , Harini Katakam References: <958bb823-3dc8-607f-3c38-3d902acb85a8@gmail.com> <20190219172515.GC13075@lunn.ch> <9cb2f7a8-a8cf-ef80-d260-cc67c072b5c5@xilinx.com> <8bb813fb-102b-00c9-fb6f-a3e928965051@xilinx.com> <20190309161912.GD9000@lunn.ch> From: Michal Simek Message-ID: <29a9b36a-eeae-c768-cd71-c10294f011a1@xilinx.com> Date: Mon, 11 Mar 2019 07:45:22 +0100 User-Agent: Mozilla/5.0 (X11; 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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR02MB3723 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190310_234546_020386_CA41DD9D X-CRM114-Status: GOOD ( 12.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Florian Fainelli , netdev@vger.kernel.org, Michal Simek , linux-kernel@vger.kernel.org, Paul Kocialkowski , Thomas Petazzoni , "David S . Miller" , linux-arm-kernel@lists.infradead.org, Heiner Kallweit Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 09. 03. 19 17:19, Andrew Lunn wrote: >> Related to this, I have a query on how the DT node for gmii2rgmii should look. >> One of the users of gmii2rgmii is Cadence macb driver. In Xilinx tree, we use >> this piece of code to register this mdiobus: >> + mdio_np = of_get_child_by_name(np, "mdio"); >> + if (mdio_np) { >> + of_node_put(mdio_np); >> + err = of_mdiobus_register(bp->mii_bus, mdio_np); >> + if (err) >> + goto err_out_unregister_bus; >> >> And the DT node looks like this: >> ethernet { >> phy-mode = "gmii"; >> phy-handle = <&extphy>; >> >> mdio { >> extphy { >> reg = ; >> }; >> gmii_to_rgmii{ >> compatible = "xlnx,gmii-to-rgmii-1.0"; >> phy-handle = <&extphy>; >> reg = ; >> }; >> }; >> }; > > Hi Harini > > You have this setup: > > MAC <==> GMII2RGMII <==> RGMII_PHY > > So you want the MAC phy-handle to point to the gmii_to_rgmii 'PHY'. That means that MAC should talk to GMII2RGMII bridge as normall talks to RGMII_PHY and then GMII2RGMII bridge should talk to RGMII_PHY. Anyway good to read it because that's exactly how we have done it in u-boot. Thanks, Michal _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel