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 source selection as
a mux, consistent with generic binding conventions.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
v4->v5:
 - No changes.

v3->v4:
 - Collected CDooley tag.

v2->v3:
 - Improved commit body.
 - Improved mux-states description.

v1->v2:
 - New patch

 Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
index 2cd0efa75f81..448da30757f2 100644
--- a/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml
@@ -102,6 +102,11 @@ properties:
 
   dr_mode: true
 
+  mux-states:
+    description:
+      phandle to a mux controller node that select the source for USB VBUS.
+    maxItems: 1
+
 if:
   properties:
     compatible:
-- 
2.43.0

On Thu, 27 Nov 2025 12:48:36 +0100, Tommaso Merciai wrote:
> 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 source selection as
> a mux, consistent with generic binding conventions.
> 
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
> ---
> v4->v5:
>  - No changes.
> 
> v3->v4:
>  - Collected CDooley tag.
> 
> v2->v3:
>  - Improved commit body.
>  - Improved mux-states description.
> 
> v1->v2:
>  - New patch
> 
>  Documentation/devicetree/bindings/phy/renesas,usb2-phy.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:


doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/5c5a85eb777f327e659cb3a969ebed8531c05a26.1764241212.git.tommaso.merciai.xr@bp.renesas.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.