nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity

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

Browse source 
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
View file

@ -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.