net: dsa: Allow configuration of CPU & DSA port speeds/duplex
By default, DSA and CPU ports are configured to the maximum speed the
switch supports. However there can be use cases where the peer devices
port is slower. Allow a fixed-link property to be used with the DSA
and CPU port in the device tree, and use this information to configure
the port.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 053eb2b..afff173 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -176,6 +176,35 @@
#endif /* CONFIG_NET_DSA_HWMON */
/* basic switch operations **************************************************/
+static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master)
+{
+ struct dsa_chip_data *cd = ds->pd;
+ struct device_node *port_dn;
+ struct phy_device *phydev;
+ int ret, port;
+
+ for (port = 0; port < DSA_MAX_PORTS; port++) {
+ if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
+ continue;
+
+ port_dn = cd->port_dn[port];
+ if (of_phy_is_fixed_link(port_dn)) {
+ ret = of_phy_register_fixed_link(port_dn);
+ if (ret) {
+ netdev_err(master,
+ "failed to register fixed PHY\n");
+ return ret;
+ }
+ phydev = of_phy_find_device(port_dn);
+ genphy_config_init(phydev);
+ genphy_read_status(phydev);
+ if (ds->drv->adjust_link)
+ ds->drv->adjust_link(ds, port, phydev);
+ }
+ }
+ return 0;
+}
+
static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
{
struct dsa_switch_driver *drv = ds->drv;
@@ -297,6 +326,14 @@
}
}
+ /* Perform configuration of the CPU and DSA ports */
+ ret = dsa_cpu_dsa_setup(ds, dst->master_netdev);
+ if (ret < 0) {
+ netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n",
+ index);
+ ret = 0;
+ }
+
#ifdef CONFIG_NET_DSA_HWMON
/* If the switch provides a temperature sensor,
* register with hardware monitoring subsystem.