netdev - Re: [PATCH net-next v3 08/12] dt-bindings: net: dsa: lantiq,gswip: add MaxLinear RMII refclk output property

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Message-ID: <54aafa653367790d4db14b097c1f87f542deeeea.camel@siemens.com>
Date: Mon, 27 Oct 2025 09:41:52 +0000
From: "Sverdlin, Alexander" <alexander.sverdlin@...mens.com>
To: "daniel@...rotopia.org" <daniel@...rotopia.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: "andrew@...n.ch" <andrew@...n.ch>, "olteanv@...il.com"
	<olteanv@...il.com>, "robh@...nel.org" <robh@...nel.org>, "lxu@...linear.com"
	<lxu@...linear.com>, "john@...ozen.org" <john@...ozen.org>,
	"davem@...emloft.net" <davem@...emloft.net>, "yweng@...linear.com"
	<yweng@...linear.com>, "bxu@...linear.com" <bxu@...linear.com>,
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	<pabeni@...hat.com>, "conor+dt@...nel.org" <conor+dt@...nel.org>,
	"fchan@...linear.com" <fchan@...linear.com>, "ajayaraman@...linear.com"
	<ajayaraman@...linear.com>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
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	<jpovazanec@...linear.com>, "linux@...linux.org.uk" <linux@...linux.org.uk>
Subject: Re: [PATCH net-next v3 08/12] dt-bindings: net: dsa: lantiq,gswip:
 add MaxLinear RMII refclk output property

Hi Daniel,

On Sun, 2025-10-26 at 23:47 +0000, Daniel Golle wrote:
> Add support for the maxlinear,rmii-refclk-out boolean property on port
> nodes to configure the RMII reference clock to be an output rather than
> an input.
> 
> This property is only applicable for ports using RMII and allows the
> switch to provide the reference clock for RMII-connected PHYs instead
> of requiring an external clock source.
> 
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>

Reviewed-by: Alexander Sverdlin <alexander.sverdlin@...mens.com>

> ---
>  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 b0227b80716c..dd3858bad8ca 100644
> --- a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
> @@ -29,6 +29,11 @@ patternProperties:
>              description:
>                RGMII RX Clock Delay defined in pico seconds.
>                The delay lines adjust the MII clock vs. data timing.
> +          maxlinear,rmii-refclk-out:
> +            type: boolean
> +            description:
> +              Configure the RMII reference clock to be a clock output
> +              rather than an input. Only applicable for RMII mode.

-- 
Alexander Sverdlin
Siemens AG
www.siemens.com