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net: dsa: Allow configuration of CPU & DSA port speeds/duplex

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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>
This commit is contained in:
Andrew Lunn 2015-08-31 15:56:49 +02:00 committed by David S. Miller
parent 34b31da486
commit 39b0c70519
1 changed files with 37 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

37
net/dsa/dsa.c
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@ -176,6 +176,35 @@ __ATTRIBUTE_GROUPS(dsa_hwmon);
#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 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
}
}
/* 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.