Subject: [PATCH v2 1/5] dt-bindings: phy: rockchip,inno-usb2phy: Require GRF for RK3568/RV1108

From: Heiko Stuebner <[email-masked]>
Date: Tue, 5 May 2026 19:04:06 +0200

From: Jonas Karlman <[email-masked]>

Typically these Rockchip USB2 PHYs are fully contained within a single
GRF. However, for RK3568 and RV1108 regs to control the USB2 PHY is
located in a different GRF compared to the base address.

Update this binding to require rockchip,usbgrf for RK3568 and RV1108 to
properly reflect that the USB GRF is required to control the USB2 PHYs
on these variants. Also disable use of rockchip,usbgrf for variants
where it is not required.

This should not introduce any breakage as the affected usb2phy nodes for
RK3568 and RV1108 were added together with a rockchip,usbgrf phandle in
their initial commit.

Signed-off-by: Jonas Karlman <[email-masked]>
Acked-by: Rob Herring (Arm) <[email-masked]>
Signed-off-by: Heiko Stuebner <[email-masked]>
---
 .../bindings/phy/rockchip,inno-usb2phy.yaml        | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
index 58e735b5dd05..b95c9e3e44fe 100644
--- a/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
+++ b/Documentation/devicetree/bindings/phy/rockchip,inno-usb2phy.yaml
@@ -145,6 +145,20 @@ anyOf:
       - host-port
 
 allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - rockchip,rk3568-usb2phy
+              - rockchip,rv1108-usb2phy
+    then:
+      required:
+        - rockchip,usbgrf
+    else:
+      properties:
+        rockchip,usbgrf: false
+
   - if:
       properties:
         compatible:
-- 
2.47.3