[PATCH net-next 3/4] net: dsa: mv88e6xxx: implement get_phy_address

[Matthias Schiffer <matthias.schiffer@ew.tq-group.com>]

Avoid the need to specify a PHY for each physical port in the device tree
when phy_base_addr is not 0 (6250 and 6341 families).

This change should be backwards-compatible with existing device trees,
as it only adds sensible defaults where explicit definitions were
required before.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 221593261e8f..228c1b085b66 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -5379,6 +5379,13 @@ static enum dsa_tag_protocol mv88e6xxx_get_tag_protocol(struct dsa_switch *ds,
 	return chip->info->tag_protocol;
 }
 
+static int mv88e6xxx_get_phy_address(struct dsa_switch *ds, int port)
+{
+	struct mv88e6xxx_chip *chip = ds->priv;
+
+	return chip->phy_base_addr + port;
+}
+
 static int mv88e6xxx_port_mdb_prepare(struct dsa_switch *ds, int port,
 				      const struct switchdev_obj_port_mdb *mdb)
 {
@@ -5509,6 +5516,7 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
 	.get_tag_protocol	= mv88e6xxx_get_tag_protocol,
 	.setup			= mv88e6xxx_setup,
 	.teardown		= mv88e6xxx_teardown,
+	.get_phy_address	= mv88e6xxx_get_phy_address,
 	.phylink_validate	= mv88e6xxx_validate,
 	.phylink_mac_link_state	= mv88e6xxx_serdes_pcs_get_state,
 	.phylink_mac_config	= mv88e6xxx_mac_config,
-- 
2.17.1