2 files changed, 45 insertions, 0 deletions

diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
index 04c3274fbe1..4ba9ee1529e 100644
--- a/drivers/net/sun8i_emac.c
+++ b/drivers/net/sun8i_emac.c
@@ -29,6 +29,7 @@
 #include <net.h>
 #include <reset.h>
 #include <wait_bit.h>
+#include <power/regulator.h>
 
 #define MDIO_CMD_MII_BUSY		BIT(0)
 #define MDIO_CMD_MII_WRITE		BIT(1)
@@ -170,6 +171,7 @@ struct emac_eth_dev {
 #if CONFIG_IS_ENABLED(DM_GPIO)
 	struct gpio_desc reset_gpio;
 #endif
+	struct udevice *phy_reg;
 };
 
 
@@ -720,6 +722,9 @@ static int sun8i_emac_eth_probe(struct udevice *dev)
 
 	sun8i_emac_set_syscon(sun8i_pdata, priv);
 
+	if (priv->phy_reg)
+		regulator_set_enable(priv->phy_reg, true);
+
 	sun8i_mdio_init(dev->name, dev);
 	priv->bus = miiphy_get_dev_by_name(dev->name);
 
@@ -829,6 +834,8 @@ static int sun8i_emac_eth_of_to_plat(struct udevice *dev)
 
 	priv->sysctl_reg = (void *)syscon_base + priv->variant->syscon_offset;
 
+	device_get_supply_regulator(dev, "phy-supply", &priv->phy_reg);
+
 	pdata->phy_interface = -1;
 	priv->phyaddr = -1;
 	priv->use_internal_phy = false;
diff --git a/drivers/net/sunxi_emac.c b/drivers/net/sunxi_emac.c
index 4c90d4b4981..f546ad1fe8d 100644
--- a/drivers/net/sunxi_emac.c
+++ b/drivers/net/sunxi_emac.c
@@ -17,6 +17,7 @@
 #include <net.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
+#include <power/regulator.h>
 
 /* EMAC register  */
 struct emac_regs {
@@ -165,6 +166,7 @@ struct emac_eth_dev {
 	struct phy_device *phydev;
 	int link_printed;
 	uchar rx_buf[EMAC_RX_BUFSIZE];
+	struct udevice *phy_reg;
 };
 
 struct emac_rxhdr {
@@ -572,6 +574,9 @@ static int sunxi_emac_eth_probe(struct udevice *dev)
 	if (ret)
 		return ret;
 
+	if (priv->phy_reg)
+		regulator_set_enable(priv->phy_reg, true);
+
 	return sunxi_emac_init_phy(priv, dev);
 }
 
@@ -585,9 +590,42 @@ static const struct eth_ops sunxi_emac_eth_ops = {
 static int sunxi_emac_eth_of_to_plat(struct udevice *dev)
 {
 	struct eth_pdata *pdata = dev_get_plat(dev);
+	struct emac_eth_dev *priv = dev_get_priv(dev);
+	struct ofnode_phandle_args args;
+	ofnode phy_node, mdio_node;
+	int ret;
 
 	pdata->iobase = dev_read_addr(dev);
 
+	phy_node = dev_get_phy_node(dev);
+	if (!ofnode_valid(phy_node)) {
+		dev_err(dev, "failed to get PHY node\n");
+		return -ENOENT;
+	}
+	/*
+	 * The PHY regulator is in the MDIO node, not the EMAC or PHY node.
+	 * U-Boot does not have (and does not need) a device driver for the
+	 * MDIO device, so just "pass through" that DT node to get to the
+	 * regulator phandle.
+	 * The PHY regulator is optional, though: ignore if we cannot find
+	 * a phy-supply property.
+	 */
+	mdio_node = ofnode_get_parent(phy_node);
+	ret= ofnode_parse_phandle_with_args(mdio_node, "phy-supply", NULL, 0, 0,
+					    &args);
+	if (ret && ret != -ENOENT) {
+		dev_err(dev, "failed to get PHY supply node\n");
+		return ret;
+	}
+	if (!ret) {
+		ret = uclass_get_device_by_ofnode(UCLASS_REGULATOR, args.node,
+						  &priv->phy_reg);
+		if (ret) {
+			dev_err(dev, "failed to get PHY regulator node\n");
+			return ret;
+		}
+	}
+
 	return 0;
 }