From: Raag Jadav <raagjadav@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Steen Hegelund <steen.hegelund@microchip.com>,
Bjarni Jonasson <bjarni.jonasson@microchip.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: phy: mscc: enable MAC SerDes autonegotiation
Date: Tue, 8 Feb 2022 21:27:52 +0530 [thread overview]
Message-ID: <20220208155752.GB3003@localhost> (raw)
In-Reply-To: <YgHQ7Kf+2c9knxk3@lunn.ch>
On Tue, Feb 08, 2022 at 03:09:48AM +0100, Andrew Lunn wrote:
> > MAC implementation[1] in a lot of NXP SoCs comes with in-band aneg enabled
> > by default, and it does expect Clause 37 auto-negotiation to complete
> > between MAC and PHY before the actual data transfer happens.
> >
> > [1] https://community.nxp.com/pwmxy87654/attachments/pwmxy87654/t-series/3241/1/AN3869(1).pdf
> >
> > I faced such issue while integrating VSC85xx PHY
> > with one of the recent NXP SoC having similar MAC implementation.
> > Not sure if this is a problem on MAC side or PHY side,
> > But having Clause 37 support should help in most cases I believe.
>
> So please use this information in the commit message.
>
> The only danger with this change is, is the PHY O.K with auto-neg
> turned on, with a MAC which does not actually perform auto-neg? It
> could be we have boards which work now because PHY autoneg is turned
> off.
>
Introducing an optional device tree property could be of any help?
> Andrew
next prev parent reply other threads:[~2022-02-08 15:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-05 6:44 [PATCH] net: phy: mscc: enable MAC SerDes autonegotiation Raag Jadav
2022-02-05 14:57 ` Andrew Lunn
2022-02-06 17:12 ` Raag Jadav
2022-02-06 17:18 ` Russell King (Oracle)
2022-02-06 18:01 ` Andrew Lunn
2022-02-07 17:49 ` Raag Jadav
2022-02-08 2:09 ` Andrew Lunn
2022-02-08 15:57 ` Raag Jadav [this message]
2022-02-08 16:01 ` Russell King (Oracle)
2022-02-08 19:12 ` Andrew Lunn
2022-02-10 16:48 ` Raag Jadav
2022-02-08 9:45 ` Russell King (Oracle)
2022-02-08 15:53 ` Raag Jadav
2022-02-24 10:41 ` Siddharth Narayan Vadapalli
2022-02-24 10:48 ` Russell King (Oracle)
2022-02-26 7:23 ` Raag Jadav
2022-02-26 16:31 ` Russell King (Oracle)
2022-03-27 8:32 ` Raag Jadav
2022-03-24 10:06 ` Siddharth Vadapalli
2022-03-27 8:30 ` Raag Jadav
2022-03-28 8:13 ` Siddharth Vadapalli
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