[PATCH v2 1/1] dt-bindings: remoteproc: mtk,scp: Allow multiple memory regions for MT8188

[Arnab Layek <arnab.layek@mediatek.com>]

The MT8188 SCP requires two reserved memory regions:
1. Main SCP SRAM memory region (required)
2. SCP L1TCM memory region (optional, for additional memory)

Some other MediaTek SoCs only use a single memory region. This patch adds
a conditional schema using if/then to allow 1-2 memory regions
specifically for mediatek,mt8188-scp and mediatek,mt8188-scp-dual
compatibles, while keeping the default maxItems: 1 for other
SoCs.

Each memory region is documented with descriptions to
clarify their purpose, following the pattern used in other bindings.

Signed-off-by: Arnab Layek <arnab.layek@mediatek.com>
---
 .../bindings/remoteproc/mtk,scp.yaml          | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
index bdbb12118da4..df13be2026a6 100644
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
@@ -205,6 +205,27 @@ allOf:
           items:
             - const: cfg
             - const: l1tcm
+  - if:
+      properties:
+        compatible:
+          enum:
+            - mediatek,mt8188-scp
+            - mediatek,mt8188-scp-dual
+    then:
+      properties:
+        memory-region:
+          minItems: 1
+          items:
+            - description: Main SCP SRAM memory region
+            - description: Optional SCP L1TCM memory region
+      patternProperties:
+        "^scp@[a-f0-9]+$":
+          properties:
+            memory-region:
+              minItems: 1
+              items:
+                - description: Main SCP SRAM memory region
+                - description: Optional SCP L1TCM memory region
 
 additionalProperties: false
 
-- 
2.45.2