[PATCH russell-kings-net-queue 1/2] net: dsa: fill phylink's config supported_interfaces member

["Marek Behún" <kabel@kernel.org>]

Add a new DSA switch operation, phylink_get_interfaces, which should
fill in which PHY_INTERFACE_MODE_* are supported by given port.

Use this before phylink_create to fill phylink's config
supported_interfaces member.

This allows for phylink to determine which PHY_INTERFACE_MODE to use
with SFP modules.

Signed-off-by: Marek Behún <kabel@kernel.org>
---
 include/net/dsa.h | 2 ++
 net/dsa/slave.c   | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 75c8fac82017..710900b6019b 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -438,6 +438,8 @@ struct dsa_switch_ops {
 	/*
 	 * PHYLINK integration
 	 */
+	void	(*phylink_get_interfaces)(struct dsa_switch *ds, int port,
+					  unsigned long *supported_interfaces);
 	void	(*phylink_validate)(struct dsa_switch *ds, int port,
 				    unsigned long *supported,
 				    struct phylink_link_state *state);
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 16e5f98d4882..0f24d2f28737 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -1639,6 +1639,10 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
 		dp->pl_config.poll_fixed_state = true;
 	}
 
+	if (ds->ops->phylink_get_interfaces)
+		ds->ops->phylink_get_interfaces(ds, dp->index,
+			dp->pl_config.supported_interfaces);
+
 	dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
 				&dsa_port_phylink_mac_ops);
 	if (IS_ERR(dp->pl)) {
-- 
2.26.2