The XPCS blocks in NXP SJA1105 and SJA1110 may be described in the
device tree, and they follow the same bindings as the other instances
which are memory-mapped using an APB3 or MCI interface.

Document their compatible string, positioning in the switch's "regs"
subnode, and the pcs-handle to them.

The "type: object" addition in the ethernet-port node is to suppress
a dt_binding_check warning that states "node schemas must have a type
or $ref". This is fine, but I don't completely understand why it started
being required just now (apparently, the presence of "properties" under
the port node affects this).

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
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 .../bindings/net/dsa/nxp,sja1105.yaml         | 28 +++++++++++++++++++
 .../bindings/net/pcs/snps,dw-xpcs.yaml        |  8 ++++++
 2 files changed, 36 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
index 607b7fe8d28e..ee1a95d6b032 100644
--- a/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/nxp,sja1105.yaml
@@ -85,11 +85,31 @@ properties:
           - compatible
           - reg
 
+  regs:
+    type: object
+    description:
+      Optional container node for peripherals in the switch address space other
+      than the switching IP itself. This node and its children only need to be
+      described if board-specific properties need to be specified, like SerDes
+      lane polarity inversion. If absent, default descriptions are used.
+    additionalProperties: false
+
+    properties:
+      '#address-cells':
+        const: 1
+      '#size-cells':
+        const: 1
+
+    patternProperties:
+      "^ethernet-pcs@[0-9a-f]+$":
+        $ref: /schemas/net/pcs/snps,dw-xpcs.yaml#
+
 patternProperties:
   "^(ethernet-)?ports$":
     additionalProperties: true
     patternProperties:
       "^(ethernet-)?port@[0-9]$":
+        type: object
         allOf:
           - if:
               properties:
@@ -107,6 +127,14 @@ patternProperties:
                 tx-internal-delay-ps:
                   $ref: "#/$defs/internal-delay-ps"
 
+        properties:
+          pcs-handle:
+            $ref: /schemas/types.yaml#/definitions/phandle
+            description:
+              Phandle to a PCS device node from the "regs" container.
+              Can be skipped if the PCS description is missing - in that case,
+              the connection is implicit.
+
 required:
   - compatible
   - reg
diff --git a/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml b/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
index e77eec9ac9ee..46e4f611f714 100644
--- a/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
+++ b/Documentation/devicetree/bindings/net/pcs/snps,dw-xpcs.yaml
@@ -25,6 +25,14 @@ description:
 properties:
   compatible:
     oneOf:
+      - description:
+          Synopsys DesignWare XPCS in NXP SJA1105 switch (direct APB3 access
+          via SPI) with custom PMA
+        const: nxp,sja1105-pcs
+      - description:
+          Synopsys DesignWare XPCS in NXP SJA1110 switch (indirect APB3 access
+          via SPI) with custom PMA
+        const: nxp,sja1110-pcs
       - description: Synopsys DesignWare XPCS with none or unknown PMA
         const: snps,dw-xpcs
       - description: Synopsys DesignWare XPCS with Consumer Gen1 3G PMA
-- 
2.34.1