Re: [PATCH v5 0/2] ethtool: implement Energy Detect Powerdown support via phy-tunable

[David Miller]

From: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
Date: Mon, 16 Sep 2019 10:35:24 +0300

> This changeset proposes a new control for PHY tunable to control Energy
> Detect Power Down.
> 
> The `phy_tunable_id` has been named `ETHTOOL_PHY_EDPD` since it looks like
> this feature is common across other PHYs (like EEE), and defining
> `ETHTOOL_PHY_ENERGY_DETECT_POWER_DOWN` seems too long.
>     
> The way EDPD works, is that the RX block is put to a lower power mode,
> except for link-pulse detection circuits. The TX block is also put to low
> power mode, but the PHY wakes-up periodically to send link pulses, to avoid
> lock-ups in case the other side is also in EDPD mode.
>     
> Currently, there are 2 PHY drivers that look like they could use this new
> PHY tunable feature: the `adin` && `micrel` PHYs.
> 
> This series updates only the `adin` PHY driver to support this new feature,
> as this chip has been tested. A change for `micrel` can be proposed after a
> discussion of the PHY-tunable API is resolved.

Series applied.