[PATCH v2 08/21] dt-bindings: phy: renesas,usb2-phy: Document mux-states property

[Tommaso Merciai]

Some Renesas SoCs, such as RZ/G3E, provide a USB2.0 OTG PHY with
configurable VBUS control through a multiplexed hardware register.
This register allows selecting the VBUS source via a mux control
line exposed by the PHY.

To represent this hardware configuration, support the standard
`mux-states` property in the Renesas USB2 PHY binding.
This allows the DeviceTree to model the VBUS selection as a mux,
consistent with generic binding conventions.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr at bp.renesas.com>
---
v1->v2:
 - New patch

 Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
index 2cd0efa75f81..899a20797bb8 100644
--- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
@@ -102,6 +102,12 @@ properties:
 
   dr_mode: true
 
+  mux-states:
+    description:
+      phandle to a mux controller node that controls the VBUSEN signal
+      for USB VBUS.
+    maxItems: 1
+
 if:
   properties:
     compatible:
-- 
2.43.0