[PATCH net-next v6 3/5] net: cadence: macb: add ethtool EEE support

[Nicolai Buchwitz <nb@tipi-net.de>]

Implement get_eee and set_eee ethtool ops for GEM as simple passthroughs
to phylink_ethtool_get_eee() and phylink_ethtool_set_eee().

No MACB_CAPS_EEE guard is needed: phylink returns -EOPNOTSUPP from both
ops when mac_supports_eee is false, which is the case when
lpi_capabilities and lpi_interfaces are not populated. Those fields are
only set when MACB_CAPS_EEE is present (previous patch), so phylink
already handles the unsupported case correctly.

Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Reviewed-by: Théo Lebrun <theo.lebrun@bootlin.com>
Signed-off-by: Nicolai Buchwitz <nb@tipi-net.de>
---
 drivers/net/ethernet/cadence/macb_main.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 4e776c67f408..f01366394cff 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -4058,6 +4058,20 @@ static const struct ethtool_ops macb_ethtool_ops = {
 	.set_ringparam		= macb_set_ringparam,
 };
 
+static int macb_get_eee(struct net_device *dev, struct ethtool_keee *eee)
+{
+	struct macb *bp = netdev_priv(dev);
+
+	return phylink_ethtool_get_eee(bp->phylink, eee);
+}
+
+static int macb_set_eee(struct net_device *dev, struct ethtool_keee *eee)
+{
+	struct macb *bp = netdev_priv(dev);
+
+	return phylink_ethtool_set_eee(bp->phylink, eee);
+}
+
 static const struct ethtool_ops gem_ethtool_ops = {
 	.get_regs_len		= macb_get_regs_len,
 	.get_regs		= macb_get_regs,
@@ -4080,6 +4094,8 @@ static const struct ethtool_ops gem_ethtool_ops = {
 	.set_rxnfc			= gem_set_rxnfc,
 	.get_rx_ring_count		= gem_get_rx_ring_count,
 	.nway_reset			= phy_ethtool_nway_reset,
+	.get_eee		= macb_get_eee,
+	.set_eee		= macb_set_eee,
 };
 
 static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-- 
2.51.0