Commit 39b0c705 authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
Browse files

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: default avatarAndrew Lunn <andrew@lunn.ch>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 34b31da4

net/dsa/dsa.c

+37 −0
Original line number Diff line number Diff line
@@ -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.

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