netdev - [PATCH net-next 15/15] net: mvpp2: set the GMAC, XLG MAC, XPCS and MPCS in reset when a port is down

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Message-Id: <20190228132128.30154-16-antoine.tenart@bootlin.com>
Date:   Thu, 28 Feb 2019 14:21:28 +0100
From:   Antoine Tenart <antoine.tenart@...tlin.com>
To:     davem@...emloft.net, linux@...linux.org.uk
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, maxime.chevallier@...tlin.com,
        gregory.clement@...tlin.com, miquel.raynal@...tlin.com,
        nadavh@...vell.com, stefanc@...vell.com, ymarkman@...vell.com,
        mw@...ihalf.com
Subject: [PATCH net-next 15/15] net: mvpp2: set the GMAC, XLG MAC, XPCS and MPCS in reset when a port is down

This patch adds calls in the stop() helper to ensure both MACs and
both PCS blocks are set in reset when the user manually sets a port
down. This is done so that we have the exact same block reset states at
boot time and when a port is set down.

Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 29d32cb3d52b..c10fd894c86f 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -3257,6 +3257,7 @@ static void mvpp2_stop_dev(struct mvpp2_port *port)
 
 	if (port->phylink)
 		phylink_stop(port->phylink);
+
 	phy_power_off(port->comphy);
 }
 
@@ -3520,6 +3521,9 @@ static int mvpp2_stop(struct net_device *dev)
 	mvpp2_cleanup_rxqs(port);
 	mvpp2_cleanup_txqs(port);
 
+	mvpp2_mac_reset(port);
+	mvpp22_pcs_reset(port);
+
 	cancel_delayed_work_sync(&port->stats_work);
 
 	return 0;
-- 
2.20.1