diff --git a/Documentation/devicetree/bindings/net/dsa/realtek.yaml b/Documentation/devicetree/bindings/net/dsa/realtek.yaml
index 473facd87a62..b7bb60af623c 100644
--- a/Documentation/devicetree/bindings/net/dsa/realtek.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/realtek.yaml
@@ -8,6 +8,20 @@ title: Realtek switches for unmanaged switches
 
 allOf:
   - $ref: dsa.yaml#/$defs/ethernet-ports
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              const: realtek,rtl8365mb
+    then:
+      properties:
+        avddh-supply: false
+        avddl-supply: false
+        dvddio-supply: false
+        dvddio1-supply: false
+        dvddl-supply: false
+        pllvddl-supply: false
 
 maintainers:
   - Linus Walleij <linusw@kernel.org>
@@ -62,6 +76,24 @@ properties:
   resets:
     maxItems: 1
 
+  avddh-supply:
+    description: AVDDH high-voltage analog supply.
+
+  avddl-supply:
+    description: AVDDL low-voltage analog supply.
+
+  dvddio-supply:
+    description: DVDDIO digital I/O supply.
+
+  dvddio1-supply:
+    description: DVDDIO_1 secondary digital I/O supply for the RGMII bank.
+
+  dvddl-supply:
+    description: DVDDL digital core supply.
+
+  pllvddl-supply:
+    description: PLLVDDL PLL analog supply.
+
   realtek,disable-leds:
     type: boolean
     description: |
@@ -243,6 +275,7 @@ examples:
     platform {
             ethernet-switch {
                     compatible = "realtek,rtl8365mb";
+                    avddh-supply = <&avddh>;
                     mdc-gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
                     mdio-gpios = <&gpio1 17 GPIO_ACTIVE_HIGH>;
                     reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
diff --git a/drivers/net/dsa/realtek/realtek.h b/drivers/net/dsa/realtek/realtek.h
index 6e0148cee8d8..75a127545e5d 100644
--- a/drivers/net/dsa/realtek/realtek.h
+++ b/drivers/net/dsa/realtek/realtek.h
@@ -166,6 +166,9 @@ struct realtek_variant {
 	u8 cmd_read;
 	u8 cmd_write;
 	size_t chip_data_sz;
+	/* Regulator supplies to enable at probe, or NULL */
+	const char *const *supplies;
+	int num_supplies;
 };
 
 /* RTL8366 library helpers */
diff --git a/drivers/net/dsa/realtek/rtl8365mb_main.c b/drivers/net/dsa/realtek/rtl8365mb_main.c
index 728231d8f94c..4c305756116c 100644
--- a/drivers/net/dsa/realtek/rtl8365mb_main.c
+++ b/drivers/net/dsa/realtek/rtl8365mb_main.c
@@ -3334,6 +3334,10 @@ static const struct realtek_ops rtl8365mb_ops = {
 	.phy_write = rtl8365mb_phy_write,
 };
 
+static const char *const rtl8365mb_supplies[] = {
+	"avddh", "avddl", "dvddio", "dvddio1", "dvddl", "pllvddl",
+};
+
 const struct realtek_variant rtl8365mb_variant = {
 	.ds_ops = &rtl8365mb_switch_ops,
 	.ops = &rtl8365mb_ops,
@@ -3342,6 +3346,8 @@ const struct realtek_variant rtl8365mb_variant = {
 	.cmd_read = 0xb9,
 	.cmd_write = 0xb8,
 	.chip_data_sz = sizeof(struct rtl8365mb),
+	.supplies = rtl8365mb_supplies,
+	.num_supplies = ARRAY_SIZE(rtl8365mb_supplies),
 };
 
 static const struct of_device_id rtl8365mb_of_match[] = {
diff --git a/drivers/net/dsa/realtek/rtl83xx.c b/drivers/net/dsa/realtek/rtl83xx.c
index a96beea72ef5..8121ec12fd8b 100644
--- a/drivers/net/dsa/realtek/rtl83xx.c
+++ b/drivers/net/dsa/realtek/rtl83xx.c
@@ -2,6 +2,7 @@
 
 #include <linux/module.h>
 #include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
 #include <linux/of_mdio.h>
 #include <linux/if_bridge.h>
 #include <linux/etherdevice.h>
@@ -195,17 +196,24 @@ rtl83xx_probe(struct device *dev,
 	priv->leds_disabled = of_property_read_bool(dev->of_node,
 						    "realtek,disable-leds");
 
-	/* TODO: if power is software controlled, set up any regulators here */
+	/* Enable the supplies before the reset line is requested and driven,
+	 * so the chip is powered before its pins are driven.
+	 */
+	if (var->num_supplies) {
+		ret = devm_regulator_bulk_get_enable(dev, var->num_supplies,
+						     var->supplies);
+		if (ret)
+			return dev_err_ptr_probe(dev, ret, "failed to enable supplies\n");
+	}
+
 	priv->reset_ctl = devm_reset_control_get_optional(dev, NULL);
 	if (IS_ERR(priv->reset_ctl))
 		return dev_err_cast_probe(dev, priv->reset_ctl,
 					  "failed to get reset control\n");
 
 	priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(priv->reset)) {
-		dev_err(dev, "failed to get RESET GPIO\n");
-		return ERR_CAST(priv->reset);
-	}
+	if (IS_ERR(priv->reset))
+		return dev_err_cast_probe(dev, priv->reset, "failed to get RESET GPIO\n");
 
 	dev_set_drvdata(dev, priv);
 
@@ -216,6 +224,11 @@ rtl83xx_probe(struct device *dev,
 		rtl83xx_reset_deassert(priv);
 		msleep(REALTEK_HW_START_DELAY);
 		dev_dbg(dev, "deasserted RESET\n");
+	} else if (var->num_supplies) {
+		/* Powered but no reset line: still wait for the chip to boot
+		 * before the first register access.
+		 */
+		msleep(REALTEK_HW_START_DELAY);
 	}
 
 	return priv;