Thread (29 messages) 29 messages, 6 authors, 2025-05-19

Re: [net-next PATCH v4 07/11] dt-bindings: net: ethernet-controller: permit to define multiple PCS

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From: Rob Herring <robh@kernel.org>
Date: 2025-05-14 21:32:49
Also in: linux-arm-kernel, linux-devicetree, linux-mediatek, lkml, llvm

On Sun, May 11, 2025 at 10:12:33PM +0200, Christian Marangi wrote:
Drop the limitation of a single PCS in pcs-handle property. Multiple PCS
can be defined for an ethrnet-controller node to support various PHY
typo
interface mode type.

It's very common for SoCs to have a 2 or more dedicated PCS for Base-X
(for example SGMII, 1000base-x, 2500base-x, ...) and Base-R (for example
USXGMII,10base-r, ...) with the MAC selecting one of the other based on
the attached PHY.
I'm confused what you need. The restriction was no arg cells allowed. 
Any number of phandles was allowed. The former would need a 
"#pcs-handle-cells" type property.
quoted hunk ↗ jump to hunk
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 Documentation/devicetree/bindings/net/ethernet-controller.yaml | 2 --
 1 file changed, 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
index 7cbf11bbe99c..60605b34d242 100644
--- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
@@ -84,8 +84,6 @@ properties:
 
   pcs-handle:
     $ref: /schemas/types.yaml#/definitions/phandle-array
-    items:
-      maxItems: 1
     description:
       Specifies a reference to a node representing a PCS PHY device on a MDIO
       bus to link with an external PHY (phy-handle) if exists.
-- 
2.48.1
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