oneOf:
       - enum:
           - qcom,msm8916-mss-pil
+          - qcom,msm8974-mss-pil
 
       - const: qcom,q6v5-pil
         description: Deprecated, prefer using qcom,msm8916-mss-pil
   pll-supply:
     description: PLL proxy supply (control handed over after startup)
 
+  mss-supply:
+    description: MSS power domain supply (only valid for qcom,msm8974-mss-pil)
+
   resets:
     items:
       - description: MSS restart control
   - smd-edge
 
 allOf:
+  - if:
+      properties:
+        compatible:
+          const: qcom,msm8974-mss-pil
+    then:
+      required:
+        - mss-supply
+    else:
+      properties:
+        mss-supply: false
+
   # Fallbacks for deprecated properties
   - oneOf:
       - required:
 
        Definition: must be one of:
                    "qcom,ipq8074-wcss-pil"
                    "qcom,qcs404-wcss-pil"
-                   "qcom,msm8974-mss-pil"
                    "qcom,msm8996-mss-pil"
                    "qcom,msm8998-mss-pil"
                    "qcom,sdm845-mss-pil"
                    string:
        qcom,ipq8074-wcss-pil:
        qcom,qcs404-wcss-pil:
-       qcom,msm8974-mss-pil:
                    must be "wdog", "fatal", "ready", "handover", "stop-ack"
        qcom,msm8996-mss-pil:
        qcom,msm8998-mss-pil:
                    "gcc_axim_cbcr", "lcc_ahbfabric_cbc", "tcsr_lcc_cbc",
                    "lcc_abhs_cbc", "lcc_tcm_slave_cbc", "lcc_abhm_cbc",
                    "lcc_axim_cbc", "lcc_bcr_sleep"
-       qcom,msm8974-mss-pil:
-                   must be "iface", "bus", "mem", "xo"
        qcom,msm8996-mss-pil:
                    must be "iface", "bus", "mem", "xo", "gpll0_mss",
                    "snoc_axi", "mnoc_axi", "pnoc", "qdss"
        Definition: reference to the reserved-memory for the mba region followed
                    by the mpss region
 
-For the compatible string below the following supplies are required:
-  "qcom,msm8974-mss-pil"
-- cx-supply: (deprecated, use power domain instead)
-- mss-supply:
-- mx-supply: (deprecated, use power domain instead)
-- pll-supply:
-       Usage: required
-       Value type: <phandle>
-       Definition: reference to the regulators to be held on behalf of the
-                   booting of the Hexagon core
-
 For the compatible string below the following supplies are required:
   "qcom,qcs404-wcss-pil"
 - cx-supply:
        Definition: The power-domains needed depend on the compatible string:
        qcom,ipq8074-wcss-pil:
                    no power-domain names required
-       qcom,msm8974-mss-pil:
        qcom,msm8996-mss-pil:
        qcom,msm8998-mss-pil:
                    must be "cx", "mx"