linux-kernel - Re: [PATCH net-next v3 1/3] dt-bindings: net: ethernet-phy: add property tx-amplitude-100base-tx-percent

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Message-ID: <20250204153409.GA2771999-robh@kernel.org>
Date: Tue, 4 Feb 2025 09:34:09 -0600
From: Rob Herring <robh@...nel.org>
To: Dimitri Fedrau <dimitri.fedrau@...bherr.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Andrew Davis <afd@...com>,
	Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Dimitri Fedrau <dima.fedrau@...il.com>
Subject: Re: [PATCH net-next v3 1/3] dt-bindings: net: ethernet-phy: add
 property tx-amplitude-100base-tx-percent

On Tue, Feb 04, 2025 at 02:09:15PM +0100, Dimitri Fedrau wrote:
> Add property tx-amplitude-100base-tx-percent in the device tree bindings
> for configuring the tx amplitude of 100BASE-TX PHYs. Modifying it can be
> necessary to compensate losses on the PCB and connector, so the voltages
> measured on the RJ45 pins are conforming.
> 
> Signed-off-by: Dimitri Fedrau <dimitri.fedrau@...bherr.com>
> ---
>  Documentation/devicetree/bindings/net/ethernet-phy.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> index 2c71454ae8e362e7032e44712949e12da6826070..04f42961035f273990fdf4368ad1352397fc3774 100644
> --- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> +++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> @@ -232,6 +232,13 @@ properties:
>        PHY's that have configurable TX internal delays. If this property is
>        present then the PHY applies the TX delay.
>  
> +  tx-amplitude-100base-tx-percent:
> +    description: |

Don't need '|' if no formatting to preserve.

> +      Transmit amplitude gain applied for 100BASE-TX. When omitted, the PHYs
> +      default will be left as is.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    default: 100
> +
>    leds:
>      type: object
>  
> 
> -- 
> 2.39.5
>