[PATCH phy-next 2/5] dt-bindings: phy: lynx-28g: add constraint on LX2162A lane indices

[Vladimir Oltean <vladimir.oltean@nxp.com>]

The SerDes 1 of LX2162A has fewer lanes than all other instances, and
strangely, their indices are not 0-3, but 4-7.

This is a best-effort constraint, since we can only impose it when using
per-SoC compatible string and per-lane OF nodes.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org

Patch previously submitted at:
https://lore.kernel.org/linux-phy/20260114152111.625350-4-vladimir.oltean@nxp.com/

Changes:
- remove redundant patternProperties: "^phy@[0-7]$": true from the
  match; having it makes no difference
- clarify that the constraint is best effort
---
 .../devicetree/bindings/phy/fsl,lynx-28g.yaml     | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/fsl,lynx-28g.yaml b/Documentation/devicetree/bindings/phy/fsl,lynx-28g.yaml
index 8375bca810cc..d73591315d4b 100644
--- a/Documentation/devicetree/bindings/phy/fsl,lynx-28g.yaml
+++ b/Documentation/devicetree/bindings/phy/fsl,lynx-28g.yaml
@@ -78,6 +78,21 @@ required:
   - reg
   - "#phy-cells"
 
+allOf:
+  # LX2162A SerDes 1 has fewer lanes than the others
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,lx2162a-serdes1
+    then:
+      patternProperties:
+        "^phy@[0-7]$":
+          properties:
+            reg:
+              minimum: 4
+              maximum: 7
+
 additionalProperties: false
 
 examples:
-- 
2.34.1