dt-bindings: gpu: v3d: Add per-compatible register restrictions

In order to enforce per-SoC register rules, add per-compatible
restrictions. For example, V3D 3.3 (used in brcm,7268-v3d) has a cache
controller (GCA), which is not present in other V3D generations. Declaring
these differences helps ensure the DTB accurately reflect the hardware
design.

The example was using an incorrect order for the register names. This
commit corrects that by enforcing the order established in the register
items description.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250317-v3d-gpu-reset-fixes-v6-2-f3ee7717ed17@igalia.com

diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml
index dc078ceeca9ac3447ba54a7c8830821f0b2a7f9f..6a1a09031983eda4691a939329ed159b32f77669 100644 (file)
--- a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml
+++ b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml
@@ -22,20 +22,12 @@ properties:
       - brcm,7278-v3d
 
   reg:
-    items:
-      - description: hub register (required)
-      - description: core0 register (required)
-      - description: GCA cache controller register (if GCA controller present)
-      - description: bridge register (if no external reset controller)
     minItems: 2
+    maxItems: 4
 
   reg-names:
-    items:
-      - const: hub
-      - const: core0
-      - enum: [ bridge, gca ]
-      - enum: [ bridge, gca ]
     minItems: 2
+    maxItems: 4
 
   interrupts:
     items:
@@ -58,6 +50,74 @@ required:
   - reg-names
   - interrupts
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,2711-v3d
+    then:
+      properties:
+        reg:
+          items:
+            - description: hub register
+            - description: core0 register
+        reg-names:
+          items:
+            - const: hub
+            - const: core0
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,2712-v3d
+    then:
+      properties:
+        reg:
+          items:
+            - description: hub register
+            - description: core0 register
+        reg-names:
+          items:
+            - const: hub
+            - const: core0
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,7268-v3d
+    then:
+      properties:
+        reg:
+          items:
+            - description: hub register
+            - description: core0 register
+            - description: GCA cache controller register
+            - description: bridge register
+        reg-names:
+          items:
+            - const: hub
+            - const: core0
+            - const: gca
+            - const: bridge
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: brcm,7278-v3d
+    then:
+      properties:
+        reg:
+          items:
+            - description: hub register
+            - description: core0 register
+            - description: bridge register
+        reg-names:
+          items:
+            - const: hub
+            - const: core0
+            - const: bridge
+
 additionalProperties: false
 
 examples:
@@ -66,9 +126,9 @@ examples:
       compatible = "brcm,7268-v3d";
       reg = <0xf1200000 0x4000>,
             <0xf1208000 0x4000>,
-            <0xf1204000 0x100>,
-            <0xf1204100 0x100>;
-      reg-names = "hub", "core0", "bridge", "gca";
+            <0xf1204100 0x100>,
+            <0xf1204000 0x100>;
+      reg-names = "hub", "core0", "gca", "bridge";
       interrupts = <0 78 4>,
                    <0 77 4>;
     };