Merge branch 'genphy-ability'

Heiner Kallweit says:

====================
net: phy: use generic PHY ability readers if callback get_features isn't set

Meanwhile we have generic functions for reading the abilities of
Clause 22 / 45 PHY's. This allows to use them as fallback in case
callback get_features isn't set. Benefit is the reduction of
boilerplate code in PHY drivers.

v2:
- adjust a comment in patch 1 to match the code
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phy_device.c

@@ -2143,12 +2143,17 @@ static int phy_probe(struct device *dev)
 	 */
 	if (phydrv->features) {
 		linkmode_copy(phydev->supported, phydrv->features);
-	} else {
+	} else if (phydrv->get_features) {
 		err = phydrv->get_features(phydev);
-		if (err)
-			goto out;
+	} else if (phydev->is_c45) {
+		err = genphy_c45_pma_read_abilities(phydev);
+	} else {
+		err = genphy_read_abilities(phydev);
 	}
 
+	if (err)
+		goto out;
+
 	of_set_phy_supported(phydev);
 	linkmode_copy(phydev->advertising, phydev->supported);
 
@@ -2216,11 +2221,11 @@ int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
 	int retval;
 
 	/* Either the features are hard coded, or dynamically
-	 * determine. It cannot be both or neither
+	 * determined. It cannot be both.
 	 */
-	if (WARN_ON((!new_driver->features && !new_driver->get_features) ||
-		    (new_driver->features && new_driver->get_features))) {
-		pr_err("%s: Driver features are missing\n", new_driver->name);
+	if (WARN_ON(new_driver->features && new_driver->get_features)) {
+		pr_err("%s: features and get_features must not both be set\n",
+		       new_driver->name);
 		return -EINVAL;
 	}
 

drivers/net/phy/realtek.c

@@ -199,11 +199,9 @@ static struct phy_driver realtek_drvs[] = {
 	{
 		PHY_ID_MATCH_EXACT(0x00008201),
 		.name           = "RTL8201CP Ethernet",
-		.get_features	= genphy_read_abilities,
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc816),
 		.name		= "RTL8201F Fast Ethernet",
-		.get_features	= genphy_read_abilities,
 		.ack_interrupt	= &rtl8201_ack_interrupt,
 		.config_intr	= &rtl8201_config_intr,
 		.suspend	= genphy_suspend,
@@ -213,14 +211,12 @@ static struct phy_driver realtek_drvs[] = {
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc910),
 		.name		= "RTL8211 Gigabit Ethernet",
-		.get_features	= genphy_read_abilities,
 		.config_aneg	= rtl8211_config_aneg,
 		.read_mmd	= &genphy_read_mmd_unsupported,
 		.write_mmd	= &genphy_write_mmd_unsupported,
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc912),
 		.name		= "RTL8211B Gigabit Ethernet",
-		.get_features	= genphy_read_abilities,
 		.ack_interrupt	= &rtl821x_ack_interrupt,
 		.config_intr	= &rtl8211b_config_intr,
 		.read_mmd	= &genphy_read_mmd_unsupported,
@@ -230,14 +226,12 @@ static struct phy_driver realtek_drvs[] = {
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc913),
 		.name		= "RTL8211C Gigabit Ethernet",
-		.get_features	= genphy_read_abilities,
 		.config_init	= rtl8211c_config_init,
 		.read_mmd	= &genphy_read_mmd_unsupported,
 		.write_mmd	= &genphy_write_mmd_unsupported,
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc914),
 		.name		= "RTL8211DN Gigabit Ethernet",
-		.get_features	= genphy_read_abilities,
 		.ack_interrupt	= rtl821x_ack_interrupt,
 		.config_intr	= rtl8211e_config_intr,
 		.suspend	= genphy_suspend,
@@ -245,7 +239,6 @@ static struct phy_driver realtek_drvs[] = {
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc915),
 		.name		= "RTL8211E Gigabit Ethernet",
-		.get_features	= genphy_read_abilities,
 		.ack_interrupt	= &rtl821x_ack_interrupt,
 		.config_intr	= &rtl8211e_config_intr,
 		.suspend	= genphy_suspend,
@@ -253,7 +246,6 @@ static struct phy_driver realtek_drvs[] = {
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc916),
 		.name		= "RTL8211F Gigabit Ethernet",
-		.get_features	= genphy_read_abilities,
 		.config_init	= &rtl8211f_config_init,
 		.ack_interrupt	= &rtl8211f_ack_interrupt,
 		.config_intr	= &rtl8211f_config_intr,
@@ -264,7 +256,6 @@ static struct phy_driver realtek_drvs[] = {
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc800),
 		.name		= "Generic Realtek PHY",
-		.get_features	= genphy_read_abilities,
 		.suspend	= genphy_suspend,
 		.resume		= genphy_resume,
 		.read_page	= rtl821x_read_page,
@@ -272,7 +263,6 @@ static struct phy_driver realtek_drvs[] = {
 	}, {
 		PHY_ID_MATCH_EXACT(0x001cc961),
 		.name		= "RTL8366RB Gigabit Ethernet",
-		.get_features	= genphy_read_abilities,
 		.config_init	= &rtl8366rb_config_init,
 		/* These interrupts are handled by the irq controller
 		 * embedded inside the RTL8366RB, they get unmasked when the