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

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Message-ID: <ZPA9hmlew3mT2TVr@shell.armlinux.org.uk>
Date:   Thu, 31 Aug 2023 08:13:10 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
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 Thu, Aug 31, 2023 at 06:40:04AM +0200, Oleksij Rempel wrote:
> Hi Lukasz,
> 
> On Wed, Aug 30, 2023 at 06:38:18PM +0200, Lukasz Majewski wrote:
> > Hi Oleksij,
>  
> > The implementation as you suggested seems to work :-)
> > 
> > The ksz_get_phy_flags() - where the MICREL_NO_EEE is set is executed
> > before ksz9477_config_init().
> > 
> > And then the eee_broken_modes are taken into account.
> > 
> > # ethtool --show-eee lan1
> > EEE Settings for lan1:
> >         EEE status: disabled
> >         Tx LPI: 0 (us)
> >         Supported EEE link modes:  100baseT/Full 
> >                                    1000baseT/Full 
> >         Advertised EEE link modes:  Not reported
> >         Link partner advertised EEE link modes:  Not reported
> > 
> > I will prepare tomorrow a proper patch.
> 
> can you please by the way remove this line:
> https://elixir.bootlin.com/linux/v6.5/source/drivers/net/phy/micrel.c#L1803
> 
> it is obsolet by eee_broken_modes.

... and if possible verify on the link partner side that indeed no
EEE modes are being advertised by the Micrel device.

-- 
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