net: dm: fec: Support the phy-supply binding

Configure the phy regulator if defined by the "phy-supply" DT phandle.
Signed-off-by: NMartin Fuzzey <martin.fuzzey@flowbird.group>
Acked-by: NJoe Hershberger <joe.hershberger@ni.com>

drivers/net/fec_mxc.c

@@ -15,6 +15,7 @@
 #include <miiphy.h>
 #include <net.h>
 #include <netdev.h>
+#include <power/regulator.h>
 
 #include <asm/io.h>
 #include <linux/errno.h>
@@ -1272,6 +1273,16 @@ static int fecmxc_probe(struct udevice *dev)
 	if (ret)
 		return ret;
 
+#ifdef CONFIG_DM_REGULATOR
+	if (priv->phy_supply) {
+		ret = regulator_autoset(priv->phy_supply);
+		if (ret) {
+			printf("%s: Error enabling phy supply\n", dev->name);
+			return ret;
+		}
+	}
+#endif
+
 #ifdef CONFIG_DM_GPIO
 	fec_gpio_reset(priv);
 #endif
@@ -1327,6 +1338,11 @@ static int fecmxc_remove(struct udevice *dev)
 	mdio_unregister(priv->bus);
 	mdio_free(priv->bus);
 
+#ifdef CONFIG_DM_REGULATOR
+	if (priv->phy_supply)
+		regulator_set_enable(priv->phy_supply, false);
+#endif
+
 	return 0;
 }
 
@@ -1350,6 +1366,10 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev)
 		return -EINVAL;
 	}
 
+#ifdef CONFIG_DM_REGULATOR
+	device_get_supply_regulator(dev, "phy-supply", &priv->phy_supply);
+#endif
+
 #ifdef CONFIG_DM_GPIO
 	ret = gpio_request_by_name(dev, "phy-reset-gpios", 0,
 				   &priv->phy_reset_gpio, GPIOD_IS_OUT);

drivers/net/fec_mxc.h

@@ -250,6 +250,9 @@ struct fec_priv {
 	int phy_id;
 	int (*mii_postcall)(int);
 #endif
+#ifdef CONFIG_DM_REGULATOR
+	struct udevice *phy_supply;
+#endif
 #ifdef CONFIG_DM_GPIO
 	struct gpio_desc phy_reset_gpio;
 	uint32_t reset_delay;