net: dsa: mv88e6xxx: add support for DSA ageing time

Implement the DSA driver function to configure the bridge ageing time.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 8e24c65..9ba2173 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3002,6 +3002,19 @@
 	return mv88e6xxx_write(chip, REG_GLOBAL, GLOBAL_ATU_CONTROL, val);
 }
 
+static int mv88e6xxx_set_ageing_time(struct dsa_switch *ds,
+				     unsigned int ageing_time)
+{
+	struct mv88e6xxx_chip *chip = ds_to_priv(ds);
+	int err;
+
+	mutex_lock(&chip->reg_lock);
+	err = mv88e6xxx_g1_set_age_time(chip, ageing_time);
+	mutex_unlock(&chip->reg_lock);
+
+	return err;
+}
+
 static int mv88e6xxx_g1_setup(struct mv88e6xxx_chip *chip)
 {
 	struct dsa_switch *ds = chip->ds;
@@ -3980,6 +3993,7 @@
 	.set_eeprom		= mv88e6xxx_set_eeprom,
 	.get_regs_len		= mv88e6xxx_get_regs_len,
 	.get_regs		= mv88e6xxx_get_regs,
+	.set_ageing_time	= mv88e6xxx_set_ageing_time,
 	.port_bridge_join	= mv88e6xxx_port_bridge_join,
 	.port_bridge_leave	= mv88e6xxx_port_bridge_leave,
 	.port_stp_state_set	= mv88e6xxx_port_stp_state_set,