Re: [PATCH net-next v1 2/4] net: phy: micrel: add EEE configuration support for KSZ9477 variants of PHYs

[Florian Fainelli]

On 1/19/23 05:18, Oleksij Rempel wrote:
> KSZ9477 variants of PHYs are not completely compatible with generic
> phy_ethtool_get/set_eee() handlers. For example MDIO_PCS_EEE_ABLE acts
> like a mirror of MDIO_AN_EEE_ADV register. If MDIO_AN_EEE_ADV set to 0,
> MDIO_PCS_EEE_ABLE will be 0 too. It means, if we do
> "ethtool --set-eee lan2 eee off", we won't be able to enable it again.
>
> With this patch, instead of reading MDIO_PCS_EEE_ABLE register, the
> driver will provide proper abilities.

We have hooks in place already for PHY drivers with the form of the 
read_mmd and write_mmd callbacks, did this somehow not work for you?

Below is an example:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d88fd1b546ff19c8040cfaea76bf16aed1c5a0bb

(here the register location is non-standard but the bit definitions 
within that register are following the standard).
--
Florian