[PATCH net-next v4 1/2] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear R(G)MII slew rate
From: "A. Sverdlin" <alexander.sverdlin@siemens.com>
Date: 2026-01-07 09:01:17
Also in:
lkml, netdev
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 maxlinear,slew-rate-txc and maxlinear,slew-rate-txd uint32
properties. The properties are only applicable for ports in R(G)MII mode
and allow 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:
v4:
- separate properties for TXD and TXC pads ("maxlinear," prefix re-appears)
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 | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
index 205b683849a53..747106810cc17 100644
--- a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml@@ -106,6 +106,20 @@ patternProperties: unevaluatedProperties: false properties: + maxlinear,slew-rate-txc: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1] + description: | + RMII/RGMII TX Clock Slew Rate: + 0: "Normal" + 1: "Slow" + maxlinear,slew-rate-txd: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1] + description: | + RMII/RGMII TX Non-Clock PAD Slew Rate: + 0: "Normal" + 1: "Slow" maxlinear,rmii-refclk-out: type: boolean description:
--
2.52.0