netdev - [PATCH] net: dsa: add missing phy address offset

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Date:   Wed, 20 Feb 2019 18:15:04 +0000
From:   Marcel Reichmuth <Marcel.Reichmuth@...module.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "andrew@...n.ch" <andrew@...n.ch>,
        "vivien.didelot@...il.com" <vivien.didelot@...il.com>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Marcel Reichmuth <Marcel.Reichmuth@...module.com>
Subject: [PATCH] net: dsa: add missing phy address offset

When phys do not start at address 0 like on the mv88e6341 the wrong
phy address is used and therefore the slave ports can not be
initialized. This patch adds the proper offset to the phy address.

Signed-off-by: Marcel Reichmuth <marcel.reichmuth@...module.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 3 +++
 include/net/dsa.h                | 1 +
 net/dsa/slave.c                  | 3 ++-
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 12fd7ce3f1ff..0ca649f784d2 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -2198,12 +2198,15 @@ static int mv88e6xxx_setup_upstream_port(struct mv88e6xxx_chip *chip, int port)
 static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
 {
 	struct dsa_switch *ds = chip->ds;
+	struct dsa_port *dp = &ds->ports[port];
 	int err;
 	u16 reg;
 
 	chip->ports[port].chip = chip;
 	chip->ports[port].port = port;
 
+	dp->phy_base_addr = chip->info->phy_base_addr;
+
 	/* MAC Forcing register: don't force link, speed, duplex or flow control
 	 * state to any particular values on physical ports, but force the CPU
 	 * port and all DSA ports to their maximum bandwidth and full duplex.
diff --git a/include/net/dsa.h b/include/net/dsa.h
index b3eefe8e18fd..f9c9dc1f6d21 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -196,6 +196,7 @@ struct dsa_port {
 
 	struct dsa_switch	*ds;
 	unsigned int		index;
+	unsigned int		phy_base_addr;
 	const char		*name;
 	const struct dsa_port	*cpu_dp;
 	struct device_node	*dn;
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index a1c9fe155057..4f67dff34a3b 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1221,7 +1221,8 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 		/* We could not connect to a designated PHY or SFP, so use the
 		 * switch internal MDIO bus instead
 		 */
-		ret = dsa_slave_phy_connect(slave_dev, dp->index);
+		ret = dsa_slave_phy_connect(slave_dev, dp->phy_base_addr +
+			dp->index);
 		if (ret) {
 			netdev_err(slave_dev,
 				   "failed to connect to port %d: %d\n",
-- 
2.11.0