dt-bindings: mmc: sdhci-msm: add ICE phandle

On newer Qualcomm SoCs (starting with sc7280/kodiak), ICE is modelled
as a dedicated DT node. Add the optional qcom,ice phandle to reference
that node from the SDHCI controller.

When qcom,ice is present, disallow an embedded ICE register region in
the SDHCI node to avoid double modelling. Older SoCs without qcom,ice
remain valid.

Co-developed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Co-developed-by: Abhinaba Rakshit <abhinaba.rakshit@oss.qualcomm.com>
Signed-off-by: Abhinaba Rakshit <abhinaba.rakshit@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Neeraj Soni <neeraj.soni@oss.qualcomm.com>
Signed-off-by: Kuldeep Singh <kuldeep.singh@oss.qualcomm.com>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>

Documentation/devicetree/bindings/mmc/qcom,sdhci-msm.yaml

@@ -145,6 +145,11 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: platform specific settings for DLL_CONFIG reg.
 
+  qcom,ice:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to the Inline Crypto Engine (ICE) hardware block for this controller.
+
   iommus:
     minItems: 1
     maxItems: 8
@@ -198,35 +203,69 @@ allOf:
             enum:
               - qcom,sdhci-msm-v4
     then:
-      properties:
-        reg:
-          minItems: 2
-          items:
-            - description: Host controller register map
-            - description: SD Core register map
-            - description: CQE register map
-            - description: Inline Crypto Engine register map
-        reg-names:
-          minItems: 2
-          items:
-            - const: hc
-            - const: core
-            - const: cqhci
-            - const: ice
+      if:
+        required:
+          - qcom,ice
+      then:
+        properties:
+          reg:
+            minItems: 2
+            items:
+              - description: Host controller register map
+              - description: SD Core register map
+              - description: CQE register map
+          reg-names:
+            minItems: 2
+            items:
+              - const: hc
+              - const: core
+              - const: cqhci
+      else:
+        properties:
+          reg:
+            minItems: 2
+            items:
+              - description: Host controller register map
+              - description: SD Core register map
+              - description: CQE register map
+              - description: Inline Crypto Engine register map
+          reg-names:
+            minItems: 2
+            items:
+              - const: hc
+              - const: core
+              - const: cqhci
+              - const: ice
     else:
-      properties:
-        reg:
-          minItems: 1
-          items:
-            - description: Host controller register map
-            - description: CQE register map
-            - description: Inline Crypto Engine register map
-        reg-names:
-          minItems: 1
-          items:
-            - const: hc
-            - const: cqhci
-            - const: ice
+      if:
+        required:
+          - qcom,ice
+      then:
+        properties:
+          reg:
+            minItems: 1
+            items:
+              - description: Host controller register map
+              - description: CQE register map
+          reg-names:
+            minItems: 1
+            items:
+              - const: hc
+              - const: cqhci
+      else:
+        properties:
+          reg:
+            minItems: 1
+            items:
+              - description: Host controller register map
+              - description: CQE register map
+              - description: Inline Crypto Engine register map
+          reg-names:
+            minItems: 1
+            items:
+              - const: hc
+              - const: cqhci
+              - const: ice
 
 unevaluatedProperties: false