From: Cyril Chemparathy <cyril@ti.com>
To: Arnaud Patard <arnaud.patard@rtp-net.org>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [patch 1/1] phy/marvell: fix 88e1121 support
Date: Mon, 18 Oct 2010 18:02:36 -0400 [thread overview]
Message-ID: <4CBCC3FC.2030506@ti.com> (raw)
In-Reply-To: <20101018214414.375368957@rtp-net.org>
Hi,
On 10/18/2010 05:44 PM, Arnaud Patard wrote:
> Commit c477d0447db08068a497e7beb892b2b2a7bff64b added support for RGMII
> rx/tx delays except that it ends up clearing rx/tx delays bit for modes
> differents that RGMII*ID. Due to this, ethernet is not working anymore
> on my guruplug server +. This patch is fixing that.
>
> Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
> Index: linux-2.6/drivers/net/phy/marvell.c
> ===================================================================
> --- linux-2.6.orig/drivers/net/phy/marvell.c 2010-10-18 22:46:09.000000000 +0200
> +++ linux-2.6/drivers/net/phy/marvell.c 2010-10-18 23:19:14.000000000 +0200
> @@ -199,13 +199,13 @@
> mscr = phy_read(phydev, MII_88E1121_PHY_MSCR_REG) &
> MII_88E1121_PHY_MSCR_DELAY_MASK;
>
> - if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
> - mscr |= (MII_88E1121_PHY_MSCR_RX_DELAY |
> - MII_88E1121_PHY_MSCR_TX_DELAY);
> - else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
> + if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
> mscr |= MII_88E1121_PHY_MSCR_RX_DELAY;
> else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
> mscr |= MII_88E1121_PHY_MSCR_TX_DELAY;
> + else
> + mscr |= (MII_88E1121_PHY_MSCR_RX_DELAY |
> + MII_88E1121_PHY_MSCR_TX_DELAY);
>
> err = phy_write(phydev, MII_88E1121_PHY_MSCR_REG, mscr);
> if (err < 0)
This doesn't look right. This change makes it impossible to configure
the phy without interface delays, i.e., PHY_INTERFACE_MODE_RGMII ends up
behaving the same as PHY_INTERFACE_MODE_RGMII_ID.
I think the correct fix would be to modify guruplug's interface mode to
PHY_INTERFACE_MODE_RGMII_ID if both TX and RX side delays are desired.
Regards
Cyril.
next prev parent reply other threads:[~2010-10-18 22:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20101018214401.053486146@rtp-net.org>
2010-10-18 21:44 ` [patch 1/1] phy/marvell: fix 88e1121 support Arnaud Patard
2010-10-18 22:02 ` Cyril Chemparathy [this message]
2010-10-18 22:29 ` [patch 0/1] " Arnaud Patard
2010-10-18 22:29 ` Arnaud Patard
2010-10-19 10:52 ` Cyril Chemparathy
2010-10-19 11:49 ` Arnaud Patard
2010-10-21 11:00 ` David Miller
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