netdev - Re: [RFC/RFT 01/23] net: phy: Add phydev->eee_active to simplify adjust link callbacks

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Message-ID: <ZCHYXbKvZhkZhJ8L@shell.armlinux.org.uk>
Date:   Mon, 27 Mar 2023 18:54:37 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev <netdev@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Oleksij Rempel <o.rempel@...gutronix.de>
Subject: Re: [RFC/RFT 01/23] net: phy: Add phydev->eee_active to simplify
 adjust link callbacks

On Mon, Mar 27, 2023 at 07:01:39PM +0200, Andrew Lunn wrote:
> MAC drivers which support EEE need to know the results of the EEE
> auto-neg in order to program the hardware to perform EEE or not.  The
> oddly named phy_init_eee() can be used to determine this, it returns 0
> if EEE should be used, or a negative error code,
> e.g. -EOPPROTONOTSUPPORT if the PHY does not support EEE or negotiate
> resulted in it not being used.
> 
> However, many MAC drivers get this wrong. Add phydev->eee_active which
> indicates the result of the autoneg for EEE, including if EEE is
> administratively disabled with ethtool. The MAC driver can then access
> this in the same way as link speed and duplex in the adjust link
> callback.
> 
> Signed-off-by: Andrew Lunn <andrew@...n.ch>

Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

Thanks!

-- 
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