From: Antoine Tenart <antoine.tenart@free-electrons.com>
To: Russell King - ARM Linux <linux@armlinux.org.uk>
Cc: Antoine Tenart <antoine.tenart@free-electrons.com>,
davem@davemloft.net, kishon@ti.com, andrew@lunn.ch,
gregory.clement@free-electrons.com, mw@semihalf.com,
stefanc@marvell.com, ymarkman@marvell.com,
thomas.petazzoni@free-electrons.com,
miquel.raynal@free-electrons.com, nadavh@marvell.com,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next v3 4/4] net: mvpp2: 2500baseX support
Date: Tue, 9 Jan 2018 16:54:11 +0100 [thread overview]
Message-ID: <20180109155411.GD23676@kwain> (raw)
In-Reply-To: <20180109151735.GB23676@kwain>
Hi Russell,
On Tue, Jan 09, 2018 at 04:17:35PM +0100, Antoine Tenart wrote:
> On Tue, Jan 09, 2018 at 02:44:48PM +0000, Russell King - ARM Linux wrote:
> > On Tue, Jan 09, 2018 at 09:59:45AM +0100, Antoine Tenart wrote:
> > > val |= MVPP2_GMAC_CONFIG_GMII_SPEED |
> > > MVPP2_GMAC_CONFIG_FULL_DUPLEX;
> > > + else if (port->phy_interface == PHY_INTERFACE_MODE_2500BASEX)
> > > + val |= MVPP2_GMAC_CONFIG_GMII_SPEED |
> > > + MVPP2_GMAC_CONFIG_MII_SPEED |
> > > + MVPP2_GMAC_CONFIG_FULL_DUPLEX;
> >
> > I think you'll find you don't need to set MII_SPEED here, since
> > MII_SPEED selects between 10 and 100, GMII_SPEED always takes
> > precidence selecting 1000, and 2500 is done by the comphy
> > increasing the clocks by 2.5x.
>
> I just had a look at the datasheet, and as you say it seems GMII_SPEED
> takes over MII_SPEED. I'll see if there is a corner case here or if
> selecting MII_SPEED doesn't make sense, and update accordingly.
I just checked, this can be removed for this mode. I'll update the
patch.
Thanks!
Antoine
--
Antoine Ténart, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
prev parent reply other threads:[~2018-01-09 15:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 8:59 [PATCH net-next v3 0/4] net: mvpp2: 1000BaseX and 2500BaseX support Antoine Tenart
2018-01-09 8:59 ` [PATCH net-next v3 1/4] phy: add 2.5G SGMII mode to the phy_mode enum Antoine Tenart
2018-01-09 8:59 ` [PATCH net-next v3 2/4] phy: cp110-comphy: 2.5G SGMII mode Antoine Tenart
2018-01-09 8:59 ` [PATCH net-next v3 3/4] net: mvpp2: 1000baseX support Antoine Tenart
2018-01-09 8:59 ` [PATCH net-next v3 4/4] net: mvpp2: 2500baseX support Antoine Tenart
2018-01-09 14:13 ` Andrew Lunn
2018-01-09 14:42 ` Russell King - ARM Linux
2018-01-09 15:11 ` Antoine Tenart
2018-01-09 14:44 ` Russell King - ARM Linux
2018-01-09 15:17 ` Antoine Tenart
2018-01-09 15:54 ` Antoine Tenart [this message]
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