The exynos8890 SoC features two dwc3 controllers with one USBDRD and
one USBHOST controller. Document compatible for the USBDRD one.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
---
 .../bindings/phy/samsung,usb3-drd-phy.yaml    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
index e90640320..2b1544baf 100644
--- a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
@@ -33,6 +33,7 @@ properties:
       - samsung,exynos7-usbdrd-phy
       - samsung,exynos7870-usbdrd-phy
       - samsung,exynos850-usbdrd-phy
+      - samsung,exynos8890-usbdrd-phy
       - samsung,exynos990-usbdrd-phy
 
   clocks:
@@ -209,6 +210,30 @@ allOf:
         reg-names:
           maxItems: 1
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynos8890-usbdrd-phy
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+
+        clock-names:
+          items:
+            - const: phy
+            - const: ref
+            - const: pipe
+
+        reg:
+          maxItems: 1
+
+        reg-names:
+          maxItems: 1
+
   - if:
       properties:
         compatible:
-- 
2.43.0