linux-kernel - [PATCH net-next v6 1/2] dt-bindings: net: microchip,ksz: document microchip,rmii-clk-internal

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Message-ID: <7f1f89010743a06c4880fd224149ea495fe32512.1701091042.git.ante.knezic@helmholz.de>
Date:   Mon, 27 Nov 2023 14:20:42 +0100
From:   Ante Knezic <ante.knezic@...mholz.de>
To:     <netdev@...r.kernel.org>
CC:     <woojung.huh@...rochip.com>, <andrew@...n.ch>,
        <f.fainelli@...il.com>, <olteanv@...il.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <marex@...x.de>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <UNGLinuxDriver@...rochip.com>,
        Ante Knezic <ante.knezic@...mholz.de>
Subject: [PATCH net-next v6 1/2] dt-bindings: net: microchip,ksz: document microchip,rmii-clk-internal

Add documentation for selecting reference rmii clock on KSZ88X3 devices

Signed-off-by: Ante Knezic <ante.knezic@...mholz.de>
---
 .../devicetree/bindings/net/dsa/microchip,ksz.yaml | 38 +++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
index b3029c64d0d5..6fd482f2656b 100644
--- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
@@ -11,7 +11,6 @@ maintainers:
   - Woojung Huh <Woojung.Huh@...rochip.com>
 
 allOf:
-  - $ref: dsa.yaml#/$defs/ethernet-ports
   - $ref: /schemas/spi/spi-peripheral-props.yaml#
 
 properties:
@@ -78,6 +77,43 @@ required:
   - compatible
   - reg
 
+if:
+  not:
+    properties:
+      compatible:
+        enum:
+          - microchip,ksz8863
+          - microchip,ksz8873
+then:
+  $ref: dsa.yaml#/$defs/ethernet-ports
+else:
+  patternProperties:
+    "^(ethernet-)?ports$":
+      patternProperties:
+        "^(ethernet-)?port@[0-2]$":
+          $ref: dsa-port.yaml#
+          properties:
+            microchip,rmii-clk-internal:
+              $ref: /schemas/types.yaml#/definitions/flag
+              description:
+                When ksz88x3 is acting as clock provier (via REFCLKO) it
+                can select between internal and external RMII reference
+                clock. Internal reference clock means that the clock for
+                the RMII of ksz88x3 is provided by the ksz88x3 internally
+                and the REFCLKI pin is unconnected. For the external
+                reference clock, the clock needs to be fed back to ksz88x3
+                via REFCLKI.
+                If microchip,rmii-clk-internal is set, ksz88x3 will provide
+                rmii reference clock internally, otherwise reference clock
+                should be provided externally.
+          if:
+            not:
+              required: [ ethernet ]
+          then:
+            properties:
+              microchip,rmii-clk-internal: false
+          unevaluatedProperties: false
+
 unevaluatedProperties: false
 
 examples:
-- 
2.11.0