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From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Calvin Johnson <calvin.johnson@oss.nxp.com>,
	Jeremy Linton <jeremy.linton@arm.com>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	linux.cj@gmail.com, Florian Fainelli <f.fainelli@gmail.com>,
	Cristi Sovaiala <cristian.sovaiala@nxp.com>,
	Florin Laurentiu Chiculita <florinlaurentiu.chiculita@nxp.com>,
	Ioana Ciornei <ioana.ciornei@nxp.com>,
	Madalin Bucur <madalin.bucur@oss.nxp.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Heikki Krogerus <heikki.krogerus@linux.intel.com>,
	Varun Sethi <V.Sethi@nxp.com>,
	"Rajesh V . Bikkina" <rajesh.bikkina@nxp.com>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Diana Madalina Craciun <diana.craciun@nxp.com>,
	netdev <netdev@vger.kernel.org>, Marcin Wojtas <mw@semihalf.com>,
	Laurentiu Tudor <laurentiu.tudor@nxp.com>,
	Makarand Pawagi <makarand.pawagi@nxp.com>,
	linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
	Pankaj Bansal <pankaj.bansal@nxp.com>,
	"David S. Miller" <davem@davemloft.net>,
	Heiner Kallweit <hkallweit1@gmail.com>
Subject: Re: [net-next PATCH v3 4/5] net: phy: Introduce fwnode_get_phy_id()
Date: Mon, 11 May 2020 14:35:08 +0100	[thread overview]
Message-ID: <20200511133508.GU1551@shell.armlinux.org.uk> (raw)
In-Reply-To: <20200511130457.GC409897@lunn.ch>

On Mon, May 11, 2020 at 03:04:57PM +0200, Andrew Lunn wrote:
> > NXP's LX2160ARDB platform currently has the following MDIO-PHY connection.
> > 
> > MDIO-1 ==> one 40G PHY, two 1G PHYs(C45), two 10G PHYs(C22)
> > MDIO-2 ==> one 25G PHY
> 
> It has been suggested that ACPI only support a one to one
> mapping. Each MAC has one MDIO bus, with one PHY on it. KISS.
> 
> This clearly does not work for your hardware. So not only do we need
> to solve how PHY properties are described, we also need an equivalent
> of phy-handle, so a MAC can indicate which PHY it is connected to.

I'd suggest that doesn't work for a lot of hardware. It won't work for
the Macchiatobin for example, where there are two Clause 45 NBASE-T
PHYs on one MDIO bus.

The same is likely true on the LX2160A - there can be multiple ethernet
interfaces, but IIRC only two external MDIO buses that one can hang
PHYs off of.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up

WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Cristi Sovaiala <cristian.sovaiala@nxp.com>,
	Calvin Johnson <calvin.johnson@oss.nxp.com>,
	Ioana Ciornei <ioana.ciornei@nxp.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	"Rajesh V . Bikkina" <rajesh.bikkina@nxp.com>,
	Pankaj Bansal <pankaj.bansal@nxp.com>,
	Diana Madalina Craciun <diana.craciun@nxp.com>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Florin Laurentiu Chiculita <florinlaurentiu.chiculita@nxp.com>,
	Madalin Bucur <madalin.bucur@oss.nxp.com>,
	Makarand Pawagi <makarand.pawagi@nxp.com>,
	Varun Sethi <V.Sethi@nxp.com>, Marcin Wojtas <mw@semihalf.com>,
	linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
	Laurentiu Tudor <laurentiu.tudor@nxp.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Jeremy Linton <jeremy.linton@arm.com>,
	linux.cj@gmail.com, netdev <netdev@vger.kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Heiner Kallweit <hkallweit1@gmail.com>
Subject: Re: [net-next PATCH v3 4/5] net: phy: Introduce fwnode_get_phy_id()
Date: Mon, 11 May 2020 14:35:08 +0100	[thread overview]
Message-ID: <20200511133508.GU1551@shell.armlinux.org.uk> (raw)
In-Reply-To: <20200511130457.GC409897@lunn.ch>

On Mon, May 11, 2020 at 03:04:57PM +0200, Andrew Lunn wrote:
> > NXP's LX2160ARDB platform currently has the following MDIO-PHY connection.
> > 
> > MDIO-1 ==> one 40G PHY, two 1G PHYs(C45), two 10G PHYs(C22)
> > MDIO-2 ==> one 25G PHY
> 
> It has been suggested that ACPI only support a one to one
> mapping. Each MAC has one MDIO bus, with one PHY on it. KISS.
> 
> This clearly does not work for your hardware. So not only do we need
> to solve how PHY properties are described, we also need an equivalent
> of phy-handle, so a MAC can indicate which PHY it is connected to.

I'd suggest that doesn't work for a lot of hardware. It won't work for
the Macchiatobin for example, where there are two Clause 45 NBASE-T
PHYs on one MDIO bus.

The same is likely true on the LX2160A - there can be multiple ethernet
interfaces, but IIRC only two external MDIO buses that one can hang
PHYs off of.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2020-05-11 13:35 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-05 13:29 [net-next PATCH v3 0/5] Introduce new fwnode based APIs to support phylink and phy layers Calvin Johnson
2020-05-05 13:29 ` Calvin Johnson
2020-05-05 13:29 ` [net-next PATCH v3 1/5] net: phy: Introduce phy related fwnode functions Calvin Johnson
2020-05-05 13:29   ` Calvin Johnson
2020-05-05 14:44   ` Russell King - ARM Linux admin
2020-05-05 14:44     ` Russell King - ARM Linux admin
2020-05-05 23:21   ` kbuild test robot
2020-05-05 23:21     ` kbuild test robot
2020-05-05 23:39   ` Russell King - ARM Linux admin
2020-05-05 23:39     ` Russell King - ARM Linux admin
2020-05-06  0:07   ` kbuild test robot
2020-05-06  0:07     ` kbuild test robot
2020-05-05 13:29 ` [net-next PATCH v3 2/5] net: phy: alphabetically sort header includes Calvin Johnson
2020-05-05 13:29   ` Calvin Johnson
2020-05-05 13:29 ` [net-next PATCH v3 3/5] phylink: Introduce phylink_fwnode_phy_connect() Calvin Johnson
2020-05-05 13:29   ` Calvin Johnson
2020-05-05 14:13   ` Andy Shevchenko
2020-05-05 14:13     ` Andy Shevchenko
2020-05-05 14:35   ` Russell King - ARM Linux admin
2020-05-05 14:35     ` Russell King - ARM Linux admin
2020-05-05 13:29 ` [net-next PATCH v3 4/5] net: phy: Introduce fwnode_get_phy_id() Calvin Johnson
2020-05-05 13:29   ` Calvin Johnson
2020-05-05 14:15   ` Andy Shevchenko
2020-05-05 14:15     ` Andy Shevchenko
2020-05-05 14:20     ` Russell King - ARM Linux admin
2020-05-05 14:20       ` Russell King - ARM Linux admin
2020-05-07 13:26   ` Jeremy Linton
2020-05-07 13:26     ` Jeremy Linton
2020-05-07 17:27     ` Andy Shevchenko
2020-05-07 17:27       ` Andy Shevchenko
2020-05-07 19:54       ` Jeremy Linton
2020-05-07 19:54         ` Jeremy Linton
2020-05-08 16:07         ` Calvin Johnson
2020-05-08 16:07           ` Calvin Johnson
2020-05-08 18:13           ` Andrew Lunn
2020-05-08 18:13             ` Andrew Lunn
2020-05-08 19:18             ` Jeremy Linton
2020-05-08 19:18               ` Jeremy Linton
2020-05-08 20:27               ` Andrew Lunn
2020-05-08 20:27                 ` Andrew Lunn
2020-05-08 22:48                 ` Jeremy Linton
2020-05-08 22:48                   ` Jeremy Linton
2020-05-08 23:42                   ` Andrew Lunn
2020-05-08 23:42                     ` Andrew Lunn
2020-05-09  0:11                     ` Jeremy Linton
2020-05-09  0:11                       ` Jeremy Linton
2020-05-11  8:00                     ` Calvin Johnson
2020-05-11  8:00                       ` Calvin Johnson
2020-05-11  9:38                       ` Russell King - ARM Linux admin
2020-05-11  9:38                         ` Russell King - ARM Linux admin
2020-05-11 10:29                         ` Calvin Johnson
2020-05-11 10:29                           ` Calvin Johnson
2020-05-11 10:48                           ` Russell King - ARM Linux admin
2020-05-11 10:48                             ` Russell King - ARM Linux admin
2020-05-11 12:02                             ` Calvin Johnson
2020-05-11 12:02                               ` Calvin Johnson
2020-05-11 13:04                       ` Andrew Lunn
2020-05-11 13:04                         ` Andrew Lunn
2020-05-11 13:35                         ` Russell King - ARM Linux admin [this message]
2020-05-11 13:35                           ` Russell King - ARM Linux admin
2020-05-11 14:59                         ` Calvin Johnson
2020-05-11 14:59                           ` Calvin Johnson
2020-05-11  7:39                   ` Calvin Johnson
2020-05-11  7:39                     ` Calvin Johnson
2020-05-11  5:52             ` Calvin Johnson
2020-05-11  5:52               ` Calvin Johnson
2020-05-11 12:53               ` Andrew Lunn
2020-05-11 12:53                 ` Andrew Lunn
2020-05-05 13:29 ` [net-next PATCH v3 5/5] net: mdiobus: Introduce fwnode_mdiobus_register_phy() Calvin Johnson
2020-05-05 13:29   ` Calvin Johnson
2020-05-05 14:22   ` Andy Shevchenko
2020-05-05 14:22     ` Andy Shevchenko
2020-05-07  7:44     ` Calvin Johnson
2020-05-07  7:44       ` Calvin Johnson
2020-05-07  9:10       ` Andy Shevchenko
2020-05-07  9:10         ` Andy Shevchenko

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