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    SubjectRE: [EXT] Re: [PATCH net-next 0/1] net: fec: add C45 MDIO read/write support
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    From: Andrew Lunn <andrew@lunn.ch>
    > On Mon, Aug 19, 2019 at 05:11:14PM +0000, Marco Hartmann wrote:
    > > As of yet, the Fast Ethernet Controller (FEC) driver only supports
    > > Clause 22 conform MDIO transactions. IEEE 802.3ae Clause 45 defines a
    > > modified MDIO protocol that uses a two staged access model in order to
    > > increase the address space.
    > >
    > > This patch adds support for Clause 45 conform MDIO read and write
    > > operations to the FEC driver.
    >
    > Hi Marco
    >
    > Do all versions of the FEC hardware support C45? Or do we need to make use
    > of the quirk support in this driver to just enable it for some revisions of FEC?
    >
    > Thanks
    > Andrew

    i.MX legacy platforms like i.MX6/7 series, they doesn't support Write & Read Increment.
    But for i.MX8MQ/MM series, it support C45 full features like Write & Read Increment.

    For the patch itself, it doesn't support Write & Read Increment, so I think the patch doesn't
    need to add quirk support.

    Andy

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