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Subject: Re: [PATCH v2] ARM: imx: allow to disable board specific PHY fixups
To:     Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc:     Florian Fainelli <f.fainelli@gmail.com>,
        Andrew Lunn <andrew@lunn.ch>, netdev@vger.kernel.org,
        Sascha Hauer <s.hauer@pengutronix.de>,
        linux-kernel@vger.kernel.org,
        Oleksij Rempel <o.rempel@pengutronix.de>, linux-imx@nxp.com,
        kernel@pengutronix.de, David Jander <david@protonic.nl>,
        Shawn Guo <shawnguo@kernel.org>,
        Fabio Estevam <festevam@gmail.com>,
        linux-arm-kernel@lists.infradead.org,
        Heiner Kallweit <hkallweit1@gmail.com>
References: <20200329110457.4113-1-o.rempel@pengutronix.de>
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From:   Marc Kleine-Budde <mkl@pengutronix.de>
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Message-ID: <f1352a82-be3a-cd0a-7cba-6f338f205098@pengutronix.de>
Date:   Tue, 31 Mar 2020 10:00:12 +0200
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On 3/31/20 9:54 AM, Russell King - ARM Linux admin wrote:
> On Tue, Mar 31, 2020 at 09:47:19AM +0200, Marc Kleine-Budde wrote:
>> On 3/30/20 7:41 PM, Russell King - ARM Linux admin wrote:
>>>>> arch/arm/mach-imx/mach-imx6q.c:167:		phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
>>>>> arch/arm/mach-imx/mach-imx6q.c:169:		phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
>>>>> arch/arm/mach-imx/mach-imx6q.c:171:		phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffef,
>>>>> arch/arm/mach-imx/mach-imx6q.c:173:		phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef,
>>>
>>> As far as I'm concerned, the AR8035 fixup is there with good reason.
>>> It's not just "random" but is required to make the AR8035 usable with
>>> the iMX6 SoCs.  Not because of a board level thing, but because it's
>>> required for the AR8035 to be usable with an iMX6 SoC.
>>
>> Is this still ture, if the AR8035 is attached to a switch behind an iMX6?
> 
> Do you know of such a setup, or are you talking about theoretical
> situations?

Granted, not for the AR8035, but for one of the KSZ Phys. This is why
Oleksij started looking into this issue in the first place.

regards,
Marc

-- 
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