linux-kernel - [PATCH v2 1/2] net: ethernet: nb8800: Do not apply TX delay at MAC level

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Date:   Fri, 4 Nov 2016 19:18:46 +0100
From:   Sebastian Frias <sf84@...oste.net>
To:     Måns Rullgård <mans@...sr.com>,
        "David S. Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, Mason <slash.tmp@...e.fr>,
        Andrew Lunn <andrew@...n.ch>
Subject: [PATCH v2 1/2] net: ethernet: nb8800: Do not apply TX delay at MAC
 level

The delay can be applied at PHY or MAC level, but since
PHY drivers will apply the delay at PHY level when using
one of the "internal delay" declinations of RGMII mode
(like PHY_INTERFACE_MODE_RGMII_TXID), applying it again
at MAC level causes issues.

Signed-off-by: Sebastian Frias <sf84@...oste.net>
---
drivers/net/ethernet/aurora/nb8800.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/aurora/nb8800.c b/drivers/net/ethernet/aurora/nb8800.c
index b59aa35..d2855c9 100644
--- a/drivers/net/ethernet/aurora/nb8800.c
+++ b/drivers/net/ethernet/aurora/nb8800.c
@@ -1282,7 +1282,7 @@ static int nb8800_tangox_init(struct net_device *dev)
break;

case PHY_INTERFACE_MODE_RGMII_TXID:
- pad_mode = PAD_MODE_RGMII | PAD_MODE_GTX_CLK_DELAY;
+ pad_mode = PAD_MODE_RGMII;
break;

default:
-- 
1.7.11.2