dt-bindings: PCI: ti,j721e-pci-*: Add checks for num-lanes

Add num-lanes schema checks based on compatible string on available lanes
for that platform.

Link: https://lore.kernel.org/linux-pci/[email protected]
Signed-off-by: Matt Ranostay <[email protected]>
Signed-off-by: Achal Verma <[email protected]>
Signed-off-by: Siddharth Vadapalli <[email protected]>
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>

Author: mranostay

Documentation/devicetree/bindings/pci/ti,j721e-pci-ep.yaml

@@ -10,9 +10,6 @@ title: TI J721E PCI EP (PCIe Wrapper)
 maintainers:
   - Kishon Vijay Abraham I <[email protected]>
 
-allOf:
-  - $ref: cdns-pcie-ep.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -65,6 +62,30 @@ properties:
     items:
       - const: link_state
 
+allOf:
+  - $ref: cdns-pcie-ep.yaml#
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,am64-pcie-ep
+    then:
+      properties:
+        num-lanes:
+          const: 1
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,j7200-pcie-ep
+            - ti,j721e-pcie-ep
+    then:
+      properties:
+        num-lanes:
+          minimum: 1
+          maximum: 2
+
 required:
   - compatible
   - reg

Documentation/devicetree/bindings/pci/ti,j721e-pci-host.yaml

@@ -10,9 +10,6 @@ title: TI J721E PCI Host (PCIe Wrapper)
 maintainers:
   - Kishon Vijay Abraham I <[email protected]>
 
-allOf:
-  - $ref: cdns-pcie-host.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -94,6 +91,30 @@ properties:
       interrupts:
         maxItems: 1
 
+allOf:
+  - $ref: cdns-pcie-host.yaml#
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,am64-pcie-host
+    then:
+      properties:
+        num-lanes:
+          const: 1
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - ti,j7200-pcie-host
+            - ti,j721e-pcie-host
+    then:
+      properties:
+        num-lanes:
+          minimum: 1
+          maximum: 2
+
 required:
   - compatible
   - reg