net: phy: marvell10g: add support for the 88x2110 PHY

This patch adds support for the 88x2110 PHY, which is similar to the
already supported 88x3310 PHY without the SFP interface.

It supports 10/100/1000BASET along with 2.5GBASET, 5GBASET and 10GBASET,
with the same interface modes that are used by the 3310.

This PHY don't have the same issue as the 88x3310 regarding 2.5/5G
abilities, and correctly follows the 802.3bz standard to list the
supported abilities.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Suggested-by: Antoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/marvell10g.c

@@ -478,12 +478,25 @@ static struct phy_driver mv3310_drivers[] = {
 		.aneg_done	= mv3310_aneg_done,
 		.read_status	= mv3310_read_status,
 	},
+	{
+		.phy_id		= MARVELL_PHY_ID_88E2110,
+		.phy_id_mask	= MARVELL_PHY_ID_MASK,
+		.name		= "mv88x2110",
+		.features	= PHY_10GBIT_FEATURES,
+		.probe		= mv3310_probe,
+		.soft_reset	= gen10g_no_soft_reset,
+		.config_init	= mv3310_config_init,
+		.config_aneg	= mv3310_config_aneg,
+		.aneg_done	= mv3310_aneg_done,
+		.read_status	= mv3310_read_status,
+	},
 };
 
 module_phy_driver(mv3310_drivers);
 
 static struct mdio_device_id __maybe_unused mv3310_tbl[] = {
 	{ MARVELL_PHY_ID_88X3310, MARVELL_PHY_ID_MASK },
+	{ MARVELL_PHY_ID_88E2110, MARVELL_PHY_ID_MASK },
 	{ },
 };
 MODULE_DEVICE_TABLE(mdio, mv3310_tbl);

include/linux/marvell_phy.h

@@ -21,6 +21,7 @@
 #define MARVELL_PHY_ID_88E1545		0x01410ea0
 #define MARVELL_PHY_ID_88E3016		0x01410e60
 #define MARVELL_PHY_ID_88X3310		0x002b09a0
+#define MARVELL_PHY_ID_88E2110		0x002b09b0
 
 /* The MV88e6390 Ethernet switch contains embedded PHYs. These PHYs do
  * not have a model ID. So the switch driver traps reads to the ID2