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Date:   Thu, 13 Jan 2022 10:29:34 -0600
From:   Rob Herring <>
To:     Marek Behún <>
        Russell King <>,
        Vinod Koul <>,,
        Vladimir Oltean <>,
        Holger Brunck <>,
        Andrew Lunn <>,
        "" <>,
        Kishon Vijay Abraham I <>,
        Rob Herring <>
Subject: Re: [PATCH devicetree v2] dt-bindings: phy: Add `tx-p2p-microvolt` property binding

On Wed, 12 Jan 2022 19:16:02 +0100, 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,
> selecting it for validation if either of the `tx-p2p-microvolt`,
> `tx-p2p-microvolt-names` properties is set for a node.
> Signed-off-by: Marek Behún <>
> ---
>  .../bindings/phy/transmit-amplitude.yaml      | 110 ++++++++++++++++++
>  1 file changed, 110 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/transmit-amplitude.yaml

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:
./Documentation/devicetree/bindings/phy/transmit-amplitude.yaml:98:7: [warning] wrong indentation: expected 8 but found 6 (indentation)
./Documentation/devicetree/bindings/phy/transmit-amplitude.yaml:100:7: [warning] wrong indentation: expected 8 but found 6 (indentation)

dtschema/dtc warnings/errors:

doc reference errors (make refcheckdocs):


This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to

pip3 install dtschema --upgrade

Please check and re-submit.

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