linux-kernel - Re: [PATCH] net: mdio: of: Do not treat fixed-link as PHY

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Date:   Mon, 30 Mar 2020 17:21:30 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, f.fainelli@...il.com,
        hkallweit1@...il.com, davem@...emloft.net
Subject: Re: [PATCH] net: mdio: of: Do not treat fixed-link as PHY

On Mon, Mar 30, 2020 at 06:17:40PM +0200, Andrew Lunn wrote:
> On Mon, Mar 30, 2020 at 07:01:36PM +0300, Codrin Ciubotariu wrote:
> > Some ethernet controllers, such as cadence's macb, have an embedded MDIO.
> > For this reason, the ethernet PHY nodes are not under an MDIO bus, but
> > directly under the ethernet node.
> 
> Hi Codrin
> 
> That is deprecated. It causes all sorts of problems putting PHY nodes
> in the MAC without a container.
> 
> Please fix macb to look for an mdio node, and place your fixed link
> inside it.

Seems wrong.

fixed links have never needed to be under a mdio node - see
Documentation/devicetree/bindings/net/ethernet-controller.yaml

fixed-link is a child of the MAC controller, not of a mdio node.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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