netdev - Re: [PATCH v3 1/2] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear R(G)MII slew rate

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Message-ID: <3cba9f17436bb3329ff4a54b6d2f8948b2aa7d5d.camel@siemens.com>
Date: Mon, 5 Jan 2026 18:00:52 +0000
From: "Sverdlin, Alexander" <alexander.sverdlin@...mens.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/2] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear
 R(G)MII slew rate

Please disregard the two patches without net-next tag, they were meant
for net-next, I've just re-sent them properly.

On Mon, 2026-01-05 at 18:53 +0100, A. Sverdlin wrote:
> From: Alexander Sverdlin <alexander.sverdlin@...mens.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@...mens.com>
> ---
> Changelog:
> v3:
> - use [pinctrl] standard "slew-rate" property as suggested by Rob
>   https://lore.kernel.org/all/20251219204324.GA3881969-robh@kernel.org/
> 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:

-- 
Alexander Sverdlin
Siemens AG
www.siemens.com