netdev - [PATCH net-next 19/27] net: mvpp2: adapt mvpp2_defaults

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Message-Id: <1482318994-23488-20-git-send-email-thomas.petazzoni@free-electrons.com>
Date:   Wed, 21 Dec 2016 12:16:26 +0100
From:   Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:     Nadav Haklai <nadavh@...vell.com>, Hanna Hawa <hannah@...vell.com>,
        Yehuda Yitschak <yehuday@...vell.com>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org,
        Stefan Chulski <stefanc@...vell.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Subject: [PATCH net-next 19/27] net: mvpp2: adapt mvpp2_defaults_set() to PPv2.2

This commit modifies the mvpp2_defaults_set() function to not do the
loopback and FIFO threshold initialization, which are not needed for
PPv2.2.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
---
 drivers/net/ethernet/marvell/mvpp2.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
index dd44065..1394ed9 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -4205,16 +4205,18 @@ static void mvpp2_defaults_set(struct mvpp2_port *port)
 {
 	int tx_port_num, val, queue, ptxq, lrxq;
 
-	/* Configure port to loopback if needed */
-	if (port->flags & MVPP2_F_LOOPBACK)
-		mvpp2_port_loopback_set(port);
-
-	/* Update TX FIFO MIN Threshold */
-	val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
-	val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK;
-	/* Min. TX threshold must be less than minimal packet length */
-	val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2);
-	writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
+	if (port->priv->ip_version == MVPP21) {
+		/* Configure port to loopback if needed */
+		if (port->flags & MVPP2_F_LOOPBACK)
+			mvpp2_port_loopback_set(port);
+
+		/* Update TX FIFO MIN Threshold */
+		val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
+		val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK;
+		/* Min. TX threshold must be less than minimal packet length */
+		val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2);
+		writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
+	}
 
 	/* Disable Legacy WRR, Disable EJP, Release from reset */
 	tx_port_num = mvpp2_egress_port(port);
-- 
2.7.4