Re: [PATCH net-next v4 1/2] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear R(G)MII slew rate

On Tue, Jan 13, 2026 at 10:59 AM Daniel Golle [off-list ref] wrote:

On Tue, Jan 13, 2026 at 10:41:28AM -0600, Rob Herring wrote:

quoted

On Wed, Jan 07, 2026 at 10:00:16AM +0100, A. Sverdlin wrote:

quoted

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]

default: 0

Not really. The default is not to touch the register value which may
have already been setup by the bootloader.

Okay, please add that to the description.

Rob