[PATCH V3 1/3] dt-bindings: usb: xhci: add support for BCM2711

[Stefan Wahren]

The xHCI IP on the BCM2711 SoC is compatible to "brcm,xhci-brcm-v2",
but also requires a power domain. So introduce a new compatible
and the specific constraints. Since the key allOf can only occur
once, merge the reference below.

Signed-off-by: Stefan Wahren <wahrenst at gmx.net>
---
 .../devicetree/bindings/usb/generic-xhci.yaml | 21 ++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/generic-xhci.yaml b/Documentation/devicetree/bindings/usb/generic-xhci.yaml
index 594ebb3ee432..b6e10b0a3c24 100644
--- a/Documentation/devicetree/bindings/usb/generic-xhci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-xhci.yaml
@@ -9,9 +9,6 @@ title: USB xHCI Controller
 maintainers:
   - Mathias Nyman <mathias.nyman at intel.com>

-allOf:
-  - $ref: usb-xhci.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -28,6 +25,7 @@ properties:
       - description: Broadcom STB SoCs with xHCI
         enum:
           - brcm,xhci-brcm-v2
+          - brcm,bcm2711-xhci
           - brcm,bcm7445-xhci
       - description: Generic xHCI device
         const: xhci-platform
@@ -49,6 +47,9 @@ properties:
       - const: core
       - const: reg

+  power-domains:
+    maxItems: 1
+
 unevaluatedProperties: false

 required:
@@ -56,6 +57,20 @@ required:
   - reg
   - interrupts

+allOf:
+  - $ref: usb-xhci.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,bcm2711-xhci
+    then:
+      required:
+        - power-domains
+    else:
+      properties:
+        power-domains: false
+
 examples:
   - |
     usb at f0931000 {
--
2.34.1