netdev - Re: [PATCH devicetree v3] dt-bindings: phy: Add `tx-p2p-microvolt` property binding

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Date:   Fri, 21 Jan 2022 11:18:09 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Marek Behún <kabel@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Cc:     Vladimir Oltean <olteanv@...il.com>,
        Holger Brunck <holger.brunck@...achienergy.com>,
        Andrew Lunn <andrew@...n.ch>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Russell King <rmk+kernel@...linux.org.uk>,
        linux-phy@...ts.infradead.org, Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH devicetree v3] dt-bindings: phy: Add `tx-p2p-microvolt`
 property binding

On 1/19/22 5:11 AM, Marek Behún wrote:
> Common PHYs and network PCSes often have the possibility to specify
> peak-to-peak voltage on the differential pair - the default voltage
> sometimes needs to be changed for a particular board.
> 
> Add properties `tx-p2p-microvolt` and `tx-p2p-microvolt-names` for this
> purpose. The second property is needed to specify the mode for the
> corresponding voltage in the `tx-p2p-microvolt` property, if the voltage
> is to be used only for speficic mode. More voltage-mode pairs can be
> specified.
> 
> Example usage with only one voltage (it will be used for all supported
> PHY modes, the `tx-p2p-microvolt-names` property is not needed in this
> case):
> 
>   tx-p2p-microvolt = <915000>;
> 
> Example usage with voltages for multiple modes:
> 
>   tx-p2p-microvolt = <915000>, <1100000>, <1200000>;
>   tx-p2p-microvolt-names = "2500base-x", "usb", "pcie";
> 
> Add these properties into a separate file phy/transmit-amplitude.yaml,
> which should be referenced by any binding that uses it.

p2p commonly means peer to peer which incidentally could be confusing,
can you spell out the property entire:

tx-peaktopeak-microvolt or:

tx-pk2pk-microvolt for a more compact name maybe?
-- 
Florian