netdev - Re: [PATCH v2] ARM: imx: allow to disable board specific PHY fixups

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Date:   Tue, 31 Mar 2020 10:00:12 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux-kernel@...r.kernel.org,
        Oleksij Rempel <o.rempel@...gutronix.de>, linux-imx@....com,
        kernel@...gutronix.de, David Jander <david@...tonic.nl>,
        Shawn Guo <shawnguo@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH v2] ARM: imx: allow to disable board specific PHY fixups

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

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
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