linux-kernel - [PATCH net-next v2 1/2] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear R(G)MII slew rate

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Message-ID: <20251216121705.65156-2-alexander.sverdlin@siemens.com>
Date: Tue, 16 Dec 2025 13:17:00 +0100
From: "A. Sverdlin" <alexander.sverdlin@...mens.com>
To: netdev@...r.kernel.org
Cc: Alexander Sverdlin <alexander.sverdlin@...mens.com>,
	Hauke Mehrtens <hauke@...ke-m.de>,
	Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Daniel Golle <daniel@...rotopia.org>
Subject: [PATCH net-next v2 1/2] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear R(G)MII slew rate

From: Alexander Sverdlin <alexander.sverdlin@...mens.com>

Add new maxlinear,mii-slew-rate-slow boolean property. This property is
only applicable for ports in R(G)MII mode and allows for slew rate
reduction in comparison to "normal" default configuration with the purpose
to reduce radiated emissions.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...mens.com>
---
Changelog:
v2:
- unchanged

 Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
index 205b683849a53..6cd5c6152c9e9 100644
--- a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
@@ -106,6 +106,11 @@ patternProperties:
         unevaluatedProperties: false
 
         properties:
+          maxlinear,mii-slew-rate-slow:
+            type: boolean
+            description:
+              Configure R(G)MII TXD/TXC pads' slew rate to "slow" instead
+              of "normal" to reduce radiated emissions.
           maxlinear,rmii-refclk-out:
             type: boolean
             description:
-- 
2.52.0