diff --git a/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
index 58ff6b0bdb1af..8c3f0cd22821e 100644
--- a/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
+++ b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
@@ -24,6 +24,9 @@ properties:
   compatible:
     const: brcm,nvram
 
+  reg:
+    maxItems: 1
+
 unevaluatedProperties: false
 
 examples:
diff --git a/Documentation/devicetree/bindings/nvmem/rmem.yaml b/Documentation/devicetree/bindings/nvmem/rmem.yaml
index 1d85a0a30846e..a4a755dcfc435 100644
--- a/Documentation/devicetree/bindings/nvmem/rmem.yaml
+++ b/Documentation/devicetree/bindings/nvmem/rmem.yaml
@@ -19,6 +19,9 @@ properties:
           - raspberrypi,bootloader-config
       - const: nvmem-rmem
 
+  reg:
+    maxItems: 1
+
   no-map:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
diff --git a/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml b/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
index a48c8fa56bce0..448a2678dc624 100644
--- a/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
+++ b/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
@@ -24,6 +24,9 @@ properties:
       - st,stm32f4-otp
       - st,stm32mp15-bsec
 
+  reg:
+    maxItems: 1
+
 patternProperties:
   "^.*@[0-9a-f]+$":
     type: object