On 2/4/2022 6:18 PM, Rob Herring 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.
Understood, my point was that peer is a word that is commonly used in an
environment where you are talking about networking equipment at large.
Anyway, feel free to ignore it.
--
Florian
