From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Fainelli Subject: Re: [PATCH net-next 6/8] MIPS: mscc: Add switch to ocelot Date: Fri, 23 Mar 2018 15:11:23 -0700 Message-ID: <171fb3db-70f4-4818-9390-8164fab5adca@gmail.com> References: <20180323201117.8416-1-alexandre.belloni@bootlin.com> <20180323201117.8416-7-alexandre.belloni@bootlin.com> <20180323212230.GA12808@piout.net> <20180323213344.GV24361@lunn.ch> <20180323220657.GY24361@lunn.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180323220657.GY24361@lunn.ch> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Andrew Lunn Cc: Alexandre Belloni , "David S . Miller" , Allan Nielsen , razvan.stefanescu@nxp.com, po.liu@nxp.com, Thomas Petazzoni , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, James Hogan List-Id: devicetree@vger.kernel.org On 03/23/2018 03:06 PM, Andrew Lunn wrote: >>> That is the trade off of having a standalone MDIO bus driver. Maybe >>> add a phandle to the internal MDIO bus? The switch driver could then >>> follow the phandle, and direct connect the internal PHYs? >> >> This is more or less what patch 7 does, right? > > Patch 7 does it in DT. I'm suggesting it could be done in C. It is > hard wired, so there is no need to describe it in DT. Use the phandle > to get the mdio bus, mdiobus_get_phy(, port) to get the phydev and > then use phy_connect(). That does not sound like a great idea. And to go back to your example about DSA, it is partially true, you will see some switch bindings defining the internal PHYs (e.g: qca8k), and most not doing it (b53, mv88e6xxx, etc.). In either case, this resolves to the same thing though. Being able to parse a phy-handle property is a lot more flexible, and if it does matter that the PHY truly is internal, then the 'phy-mode' property can help reflect that. -- Florian