Date: Tue, 26 Apr 2016 20:23:35 +0200
From: Andrew Lunn <andrew@lunn.ch>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Florian Fainelli <f.fainelli@gmail.com>,
        Pramod Kumar <pramod.kumar@broadcom.com>,
        Rob Herring <robh+dt@kernel.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Chen-Yu Tsai <wens@csie.org>, Mark Rutland <mark.rutland@arm.com>,
        devicetree@vger.kernel.org, Pawel Moll <pawel.moll@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>, netdev@vger.kernel.org,
        Punit Agrawal <punit.agrawal@arm.com>, linux-kernel@vger.kernel.org,
        BCM Kernel Feedback <bcm-kernel-feedback-list@broadcom.com>,
        linux-arm-kernel@lists.infradead.org,
        Anup Patel <anup.patel@broadcom.com>,
        Kishon Vijay Abraham I <kishon@ti.com>
Subject: Re: [PATCH 1/6] bus: Add shared MDIO bus framework
Message-ID: <20160426182335.GE30107@lunn.ch>
References: <1461230323-27891-1-git-send-email-pramod.kumar@broadcom.com>
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 <571FA3F6.7000903@gmail.com>
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> A more complex problem would be having a PHY driver for a device
> that can be either an ethernet phy or some other phy.

I doubt that ever happens. You can have up to 32 different devices on
an MDIO bus. Since an Ethernet PHY and a "some other sort of PHY" are
completely different things, why would a hardware engineer place them
on the same address? It is like saying your ATA controller and VGA
controller share the same slot on the PCI bus...

   Andrew