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Message-ID: <662be602-82a2-4e00-ba03-4b9e3aa0f8d2@lunn.ch>
Date: Wed, 6 Sep 2023 14:06:51 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Oleksij Rempel <o.rempel@...gutronix.de>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Vladimir Oltean <olteanv@...il.com>,
	Woojung Huh <woojung.huh@...rochip.com>,
	Arun Ramadoss <arun.ramadoss@...rochip.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, kernel@...gutronix.de,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	UNGLinuxDriver@...rochip.com,
	"Russell King (Oracle)" <linux@...linux.org.uk>,
	devicetree@...r.kernel.org
Subject: Re: [RFC net-next v2 1/2] dt-bindings: net: dsa: microchip: Update
 ksz device tree bindings for drive strength

On Wed, Sep 06, 2023 at 12:59:03PM +0200, Oleksij Rempel wrote:
> Extend device tree bindings to support drive strength configuration for the
> ksz* switches. Introduced properties:
> - microchip,hi-drive-strength-microamp: Controls the drive strength for
>   high-speed interfaces like GMII/RGMII and more.
> - microchip,lo-drive-strength-microamp: Governs the drive strength for
>   low-speed interfaces such as LEDs, PME_N, and others.
> - microchip,io-drive-strength-microamp: Controls the drive strength for
>   for undocumented Pads on KSZ88xx variants.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> ---
>  .../bindings/net/dsa/microchip,ksz.yaml       | 23 +++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> index e51be1ac03623..66bd770839d50 100644
> --- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> +++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> @@ -49,6 +49,29 @@ properties:
>        Set if the output SYNCLKO clock should be disabled. Do not mix with
>        microchip,synclko-125.
>  
> +  microchip,io-drive-strength-microamp:
> +    description:
> +      IO Pad Drive Strength
> +    minimum: 8000
> +    maximum: 16000
> +    default: 16000

You should list the valid values, using the syntax:

enum: [ 250, 500, 750, 1000, ...];


    Andrew

---
pw-bot: cr

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