diff --git a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml
index 40e57b10ebbe..40ddc64577e7 100644
--- a/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml
+++ b/Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml
@@ -108,7 +108,7 @@ properties:
         RPMh resource name suffix used for the regulators found
         on this PMIC.
     $ref: /schemas/types.yaml#/definitions/string
-    enum: [a, b, c, d, e, f, g, h, i, j, k, l, m, n]
+    pattern: "^[a-n]|[A-N]_E[0-3]+$"
 
   qcom,always-wait-for-ack:
     description: |