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[1/2] dt-bindings: net: snps,dwmac: document the snps,shared-mdio property

Message ID 20230807193102.6374-2-brgl@bgdev.pl (mailing list archive)
State New, archived
Headers show
Series net: stmmac: allow sharing MDIO lines | expand

Commit Message

Bartosz Golaszewski Aug. 7, 2023, 7:31 p.m. UTC 
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Two MACs may share one MDIO lines to their respective PHYs. In this case
one of the MACs is the logical "owner" of the bus, while the other can be
considered a secondary controller. Add a new property that allows one
MAC node to reference the MDIO node on a different MAC over a phandle.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 Documentation/devicetree/bindings/net/snps,dwmac.yaml | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index ddf9522a5dc2..f9c2285674d1 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -500,6 +500,12 @@  properties:
     required:
       - compatible
 
+  snps,shared-mdio:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the mdio node defined on a different MAC node which this
+      device shares.
+
   stmmac-axi-config:
     type: object
     unevaluatedProperties: false