linux-kernel - Re: [PATCH 2/2] net: phy: Provide Module 4 KSZ9477 errata (DS80000754C)

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Message-ID: <20230830144831.GM31399@pengutronix.de>
Date:   Wed, 30 Aug 2023 16:48:31 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>
Cc:     Lukasz Majewski <lukma@...x.de>,
        Eric Dumazet <edumazet@...gle.com>,
        Andrew Lunn <andrew@...n.ch>, davem@...emloft.net,
        Woojung Huh <woojung.huh@...rochip.com>,
        Vladimir Oltean <olteanv@...il.com>, Tristram.Ha@...rochip.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, UNGLinuxDriver@...rochip.com,
        Heiner Kallweit <hkallweit1@...il.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] net: phy: Provide Module 4 KSZ9477 errata
 (DS80000754C)

On Wed, Aug 30, 2023 at 03:38:55PM +0100, Russell King (Oracle) wrote:
> On Wed, Aug 30, 2023 at 04:26:50PM +0200, Oleksij Rempel wrote:
> > @Lukasz,
> > 
> > can you please try to set eee_broken_modes to all-ones. Somewhat like
> > this:
> > ksz9477_config_init()
> > ...
> >    ...quirks...
> > 
> >    if (phydev->dev_flages & .. NO_EEE...)
> >        phydev->eee_broken_modes = -1;
> 
> That's fine in config_init().
> 
> >    err = genphy_restart_aneg(phydev);
> 
> That isn't necessary, and in any case, calling it will just cause the
> AN enable and AN restart bits in BMCR to be set, nothing will be
> reprogrammed.

ack. It is already existing code, see:
https://elixir.bootlin.com/linux/v6.5/source/drivers/net/phy/micrel.c#L1822

Setting eee_broken_modes probably can be done at any plaice in this function.

Regards,
Oleksij
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