[PATCH v3 1/2] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear R(G)MII slew rate
From: "A. Sverdlin" <alexander.sverdlin@siemens.com>
Date: 2026-01-05 17:54:17
Also in:
linux-devicetree, lkml
Subsystem:
lantiq / maxlinear / intel ethernet dsa drivers, networking drivers, networking [dsa], open firmware and flattened device tree bindings, the rest · Maintainers:
Hauke Mehrtens, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn, Vladimir Oltean, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Alexander Sverdlin <alexander.sverdlin@siemens.com> Add new slew-rate uint32 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@siemens.com> --- Changelog: v3: - use [pinctrl] standard "slew-rate" property as suggested by Rob https://lore.kernel.org/all/20251219204324.GA3881969-robh@kernel.org/ (local) v2: - unchanged .../devicetree/bindings/net/dsa/lantiq,gswip.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
index 205b683849a53..277b121b159d5 100644
--- a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml@@ -111,6 +111,13 @@ patternProperties: description: Configure the RMII reference clock to be a clock output rather than an input. Only applicable for RMII mode. + slew-rate: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1] + description: | + Configure R(G)MII TXD/TXC pads' slew rate: + 0: "normal" + 1: "slow" tx-internal-delay-ps: enum: [0, 500, 1000, 1500, 2000, 2500, 3000, 3500] description:
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2.52.0