net: renesas: rswitch: add modifiable ageing time

Allow the setting of the MAC table aging in the R-Car S4 Rswitch
using the SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME attribute.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
Link: https://patch.msgid.link/20250901-add_l2_switching-v5-4-5f13e46860d5@renesas.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/renesas/rswitch_l2.c b/drivers/net/ethernet/renesas/rswitch_l2.c
index 49a24464dbb0cf3f3219a0699fc4671ddd71ef03..4a69ec77d69c600530189f3f5e86da165022bc4e 100644 (file)
--- a/drivers/net/ethernet/renesas/rswitch_l2.c
+++ b/drivers/net/ethernet/renesas/rswitch_l2.c
@@ -193,6 +193,24 @@ static int rswitch_netdevice_event(struct notifier_block *nb,
        return NOTIFY_OK;
 }
 
+static int rswitch_update_ageing_time(struct net_device *ndev, clock_t time)
+{
+       struct rswitch_device *rdev = netdev_priv(ndev);
+       u32 reg_val;
+
+       if (!is_rdev(ndev))
+               return -ENODEV;
+
+       if (!FIELD_FIT(FWMACAGC_MACAGT, time))
+               return -EINVAL;
+
+       reg_val = FIELD_PREP(FWMACAGC_MACAGT, time);
+       reg_val |= FWMACAGC_MACAGE | FWMACAGC_MACAGSL;
+       iowrite32(reg_val, rdev->priv->addr + FWMACAGC);
+
+       return 0;
+}
+
 static int rswitch_port_attr_set(struct net_device *ndev, const void *ctx,
                                 const struct switchdev_attr *attr,
                                 struct netlink_ext_ack *extack)
@@ -200,6 +218,8 @@ static int rswitch_port_attr_set(struct net_device *ndev, const void *ctx,
        switch (attr->id) {
        case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
                return rswitch_port_update_stp_state(ndev, attr->u.stp_state);
+       case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
+               return rswitch_update_ageing_time(ndev, attr->u.ageing_time);
        default:
                return -EOPNOTSUPP;
        }