linux-kernel - [PATCH v3 3/4] dt-bindings: net: ethernet-phy: add property enet-phy-lane-polarity

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260125200259.2903271-3-dam.dejean@gmail.com>
Date: Sun, 25 Jan 2026 21:02:58 +0100
From: Damien Dejean <dam.dejean@...il.com>
To: andrew@...n.ch,
	krzk+dt@...nel.org,
	robh@...nel.org
Cc: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	edumazet@...gle.com,
	davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	hkallweit1@...il.com,
	Damien Dejean <dam.dejean@...il.com>
Subject: [PATCH v3 3/4] dt-bindings: net: ethernet-phy: add property enet-phy-lane-polarity

Add the property enet-phy-lane-polarity to describe the polarity of the
PHY lanes. To ease PCB designs some manufacturers allow to wire the
pairs with a reverse polarity and provide a way to configure it.

The property 'enet-phy-lane-polarity' sets the polarity of each pair.
Bit 0 to 3 configure the polarity or pairs A to D, if set to 1 the
polarity is reversed for this pair.

Signed-off-by: Damien Dejean <dam.dejean@...il.com>
---
 Documentation/devicetree/bindings/net/ethernet-phy.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
index b8cd5d2b9f76..ec8906708100 100644
--- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
@@ -132,6 +132,14 @@ properties:
     description:
       For normal (0) or reverse (1) order of the pairs (ABCD -> DCBA).
 
+  enet-phy-lane-polarity:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 0xf
+    description:
+      A bitmap to describe pair polarity swap. Bit 0 to swap polarity of pair A,
+      bit 1 to swap polarity of pair B, bit 2 to swap polarity of pair C and bit
+      3 to swap polarity of pair D.
+
   eee-broken-100tx:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
-- 
2.47.3