From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Florinel Iordache <florinel.iordache@nxp.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"f.fainelli@gmail.com" <f.fainelli@gmail.com>,
"hkallweit1@gmail.com" <hkallweit1@gmail.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"kuba@kernel.org" <kuba@kernel.org>,
"corbet@lwn.net" <corbet@lwn.net>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
Leo Li <leoyang.li@nxp.com>,
"Madalin Bucur (OSS)" <madalin.bucur@oss.nxp.com>,
Ioana Ciornei <ioana.ciornei@nxp.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [EXT] Re: [PATCH net-next 2/9] dt-bindings: net: add backplane dt bindings
Date: Fri, 27 Mar 2020 17:35:07 +0000 [thread overview]
Message-ID: <20200327173507.GQ25745@shell.armlinux.org.uk> (raw)
In-Reply-To: <20200327154448.GK11004@lunn.ch>
On Fri, Mar 27, 2020 at 04:44:48PM +0100, Andrew Lunn wrote:
> > What worries me is the situation which I've been working on, where
> > we want access to the PCS PHYs, and we can't have the PCS PHYs
> > represented as a phylib PHY because we may have a copper PHY behind
> > the PCS PHY, and we want to be talking to the copper PHY in the
> > first instance (the PCS PHY effectivel ybecomes a slave to the
> > copper PHY.)
>
> I guess we need to clarify what KR actually means. If we have a
> backplane with a MAC on each end, i think modelling it as a PHY could
> work.
>
> If however, we have a MAC connected to a backplane, and on the end of
> the backplane is a traditional PHY, or an SFP cage, we have problems.
> As your point out, we cannot have two PHYs in a chain for one MAC.
>
> But i agree with Russell. We need a general solution of how we deal
> with PCSs.
What really worries me is that we may be driving the same hardware
with two different approaches/drivers for two different applications
which isn't going to work out very well in the long run.
--
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
next prev parent reply other threads:[~2020-03-27 17:35 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 13:51 [PATCH net-next 0/9] net: ethernet backplane support Florinel Iordache
2020-03-26 13:51 ` [PATCH net-next 1/9] doc: net: add backplane documentation Florinel Iordache
2020-03-26 13:51 ` [PATCH net-next 2/9] dt-bindings: net: add backplane dt bindings Florinel Iordache
2020-03-27 1:04 ` Andrew Lunn
2020-03-27 12:06 ` Russell King - ARM Linux admin
2020-03-27 15:00 ` [EXT] " Florinel Iordache
2020-03-27 15:28 ` Russell King - ARM Linux admin
2020-03-27 15:44 ` Andrew Lunn
2020-03-27 17:35 ` Russell King - ARM Linux admin [this message]
2020-03-30 5:43 ` Madalin Bucur (OSS)
2020-03-30 15:39 ` Rob Herring
2020-03-26 13:51 ` [PATCH net-next 3/9] net: phy: add kr phy connection type Florinel Iordache
2020-03-27 0:15 ` Andrew Lunn
2020-03-27 12:01 ` Russell King - ARM Linux admin
2020-03-27 12:12 ` Madalin Bucur (OSS)
2020-03-27 12:40 ` Russell King - ARM Linux admin
2020-03-29 8:22 ` [EXT] " Florinel Iordache
2020-03-29 9:01 ` Russell King - ARM Linux admin
2020-03-27 0:32 ` Florian Fainelli
2020-03-26 13:51 ` [PATCH net-next 4/9] net: fman: add kr support for dpaa1 mac Florinel Iordache
2020-03-26 13:51 ` [PATCH net-next 5/9] net: dpaa2: add kr support for dpaa2 mac Florinel Iordache
2020-03-26 13:51 ` [PATCH net-next 7/9] net: phy: enable qoriq backplane support Florinel Iordache
2020-03-26 20:03 ` Joe Perches
2020-03-26 20:13 ` Andrew Lunn
2020-03-26 20:27 ` Joe Perches
2020-03-26 13:51 ` [PATCH net-next 8/9] net: phy: add bee algorithm for kr training Florinel Iordache
2020-03-26 13:51 ` [PATCH net-next 9/9] arm64: dts: add serdes and mdio description Florinel Iordache
2020-03-27 12:09 ` Russell King - ARM Linux admin
[not found] ` <1585230682-24417-7-git-send-email-florinel.iordache@nxp.com>
2020-03-26 18:53 ` [PATCH net-next 6/9] net: phy: add backplane kr driver support David Miller
2020-03-26 18:55 ` Joe Perches
2020-03-26 19:07 ` David Miller
2020-03-26 19:42 ` Joe Perches
2020-03-27 1:07 ` Andrew Lunn
2020-03-27 13:02 ` [EXT] " Florinel Iordache
2020-03-27 13:23 ` Andrew Lunn
2020-03-27 17:43 ` Florian Fainelli
2020-03-27 14:22 ` Andrew Lunn
2020-03-27 18:25 ` Joe Perches
2020-03-27 14:28 ` Andrew Lunn
2020-03-27 14:33 ` Andrew Lunn
2020-03-27 14:38 ` Andrew Lunn
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