[PATCH devicetree v3] dt-bindings: phy: Add `tx-p2p-microvolt` property binding
Rob Herring
robh at kernel.org
Mon Feb 7 12:30:51 PST 2022
On Wed, 19 Jan 2022 14:11:17 +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,
> which should be referenced by any binding that uses it.
>
> Signed-off-by: Marek Behún <kabel at kernel.org>
> ---
> Change since v2:
> - removed 'select:' as requested by Rob. Instead the schema should be
> referenced by any binding that uses it. This also fixed indentation
> warnings from Rob's bot, since they warned about lines in the select
> statement
> ---
> .../bindings/phy/transmit-amplitude.yaml | 103 ++++++++++++++++++
> 1 file changed, 103 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/transmit-amplitude.yaml
>
Reviewed-by: Rob Herring <robh at kernel.org>
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