On Fri, 4 Feb 2022 20:18:40 -0600 Rob Herring <robh@xxxxxxxxxx> wrote: > On Fri, Jan 21, 2022 at 11:18:09AM -0800, Florian Fainelli wrote: > > 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? > > Peer to peer makes little sense in terms of a voltage. I think this is > fine as-is. Cool. Should this get merged via devicetree, or via phy maintainers? Or should I resend this together with patches that make use of this property? (In that case can you add your Ack?) Thanks. Marek
