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    SubjectRe: [net v4] net: phy: Provide Module 4 KSZ9477 errata (DS80000754C)
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    On 9/5/23 02:33, Lukasz Majewski wrote:
    > The KSZ9477 errata points out (in 'Module 4') the link up/down problems
    > when EEE (Energy Efficient Ethernet) is enabled in the device to which
    > the KSZ9477 tries to auto negotiate.
    >
    > The suggested workaround is to clear advertisement of EEE for PHYs in
    > this chip driver.
    >
    > To avoid regressions with other switch ICs the new MICREL_NO_EEE flag
    > has been introduced.
    >
    > Moreover, the in-register disablement of MMD_DEVICE_ID_EEE_ADV.MMD_EEE_ADV
    > MMD register is removed, as this code is both; now executed too late
    > (after previous rework of the PHY and DSA for KSZ switches) and not
    > required as setting all members of eee_broken_modes bit field prevents
    > the KSZ9477 from advertising EEE.
    >
    > Fixes: 69d3b36ca045 ("net: dsa: microchip: enable EEE support") (for KSZ9477).
    >
    > Signed-off-by: Lukasz Majewski <lukma@denx.de>
    > Tested-by: Oleksij Rempel <o.rempel@pengutronix.de>
    > Confirmed disabled EEE with oscilloscope.
    > Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>

    Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
    --
    Florian

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