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Date: Mon, 20 Jul 2015 18:23:53 +0200 From: Andrew Lunn <andrew@...n.ch> To: Michal Simek <michal.simek@...inx.com> Cc: Punnaiah Choudary Kalluri <punnaiah.choudary.kalluri@...inx.com>, nicolas.ferre@...el.com, anirudh@...inx.com, davem@...emloft.net, harinik@...inx.com, kpc528@...il.com, kalluripunnaiahchoudary@...il.com, netdev@...r.kernel.org, Punnaiah Choudary Kalluri <punnaia@...inx.com> Subject: Re: [RFC PATCH 0/2] net: macb: Add mdio driver for accessing multiple phy devices On Mon, Jul 20, 2015 at 03:30:36PM +0200, Michal Simek wrote: > Hi Nicolas, > > have you had a time to look at this? > > Thanks, > Michal > > On 07/13/2015 06:48 AM, Punnaiah Choudary Kalluri wrote: > > This patch is to add support for the design that has multiple ethernet > > mac controllers and single mdio bus connected to multiple phy devices. > > i.e mdio lines are connected to any of the ethernet mac controller and > > all the phy devices will be accessed using the phy maintenance interface > > in that mac controller. > > > > ______ _____ > > | | |PHY0 | > > | MAC0 |-----------------| | > > |______| | |_____| > > | > > ______ | _____ > > | | | | | > > | MAC1 | |_________|PHY1 | > > |______| |____ | > > > > So, i come up with two implementations for addressing the above configuration. > > > > Implementation 1: > > Have separate driver for mdio bus > > Create a DT node for all the PHY devices connected to the mdio bus > > This driver will share the register space of the mac controller that has > > mdio bus connected. > > Hi Michal The above it what Marvell, Freescale FEC and probably others do. It is well defined in Documentation/devicetree/bindings/net/ethernet.txt that you can have a phy-handle property containing a phandle to the actual phy device on some random MDIO bus. Andrew -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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