USB2.0 PHY of the RZ/V2N SoC can drive VBUS line via the VBOUT bit of
the VBCTRL register.

Add VBUS regulator nodes (usb2_phy0_vbus_otg) under the usb2_phy0
node to describe this hw functionality.

This enables proper management of VBUS for USB2.0 OTG devices and ensures
compliance with hardware requirements.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g056.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g056.dtsi b/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
index 887110878906..1cd489e3df52 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
@@ -659,6 +659,12 @@ usb2_phy0: usb-phy@15800200 {
 			#phy-cells = <1>;
 			power-domains = <&cpg>;
 			status = "disabled";
+
+			usb2_phy0_vbus_otg: vbus-regulator {
+				regulator-name = "USB2PHY0-VBUS-OTG";
+				regulator-boot-on;
+				status = "disabled";
+			};
 		};
 
 		hsusb: usb@15820000 {
-- 
2.43.0