From: Conor Dooley <conor.dooley@microchip.com>

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../devicetree/bindings/net/cdns,macb.yaml        | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/cdns,macb.yaml b/Documentation/devicetree/bindings/net/cdns,macb.yaml
index 1029786a855c..4cea288412b5 100644
--- a/Documentation/devicetree/bindings/net/cdns,macb.yaml
+++ b/Documentation/devicetree/bindings/net/cdns,macb.yaml
@@ -116,6 +116,12 @@ properties:
   power-domains:
     maxItems: 1
 
+  cdns,timer-adjust:
+    type: boolean
+    description:
+      Set when the hardware is operating in timer-adjust mode, where the timer
+      is controlled by the gem_tsu_inc_ctrl and gem_tsu_ms inputs.
+
   cdns,refclk-ext:
     type: boolean
     description:
@@ -182,6 +188,15 @@ allOf:
       properties:
         reg:
           maxItems: 1
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              const: microchip,mpfs-macb
+    then:
+      properties:
+        cdns,timer-adjust: false
 
 unevaluatedProperties: false
 
-- 
2.51.0