[PATCH v2 2/5] dt-bindings: mmc: sdhci-msm: constrain reg-names perp variants

[Krzysztof Kozlowski]

The entries in arrays must have fixed order, so the bindings and Linux
driver expecting various combinations of 'reg' addresses was never
actually conforming to guidelines.

The 'core' reg entry is valid only for SDCC v4 and lower, so disallow it
in SDCC v5.  SDCC v4 supports CQE and ICE, so allow them, even though
the qcom,sdhci-msm-v4 compatible is used also for earlier SoCs with SDCC
v2 or v3, so it is not entirely accurate.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>

---

Changes since v1:
1. Rework the patch based on Doug's feedback.
---
 .../devicetree/bindings/mmc/sdhci-msm.yaml    | 61 ++++++++++++-------
 1 file changed, 38 insertions(+), 23 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml b/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
index fc6e5221985a..2f0fdd65e908 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.yaml
@@ -49,33 +49,11 @@ properties:
 
   reg:
     minItems: 1
-    items:
-      - description: Host controller register map
-      - description: SD Core register map
-      - description: CQE register map
-      - description: Inline Crypto Engine register map
+    maxItems: 4
 
   reg-names:
     minItems: 1
     maxItems: 4
-    oneOf:
-      - items:
-          - const: hc
-      - items:
-          - const: hc
-          - const: core
-      - items:
-          - const: hc
-          - const: cqhci
-      - items:
-          - const: hc
-          - const: cqhci
-          - const: ice
-      - items:
-          - const: hc
-          - const: core
-          - const: cqhci
-          - const: ice
 
   clocks:
     minItems: 3
@@ -177,6 +155,43 @@ required:
 allOf:
   - $ref: mmc-controller.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            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
+    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
 
 examples:
-- 
2.34.1