Re: [PATCH net] net: phy: motorcomm: read EEE abilities in yt8521_get_features()

[Andrew Lunn <andrew@lunn.ch>]

On Wed, Jul 01, 2026 at 08:16:13AM +0000, Clark Wang wrote:
> > > In phy_probe(), genphy_c45_read_eee_abilities() is only called when a
> > > driver uses phydrv->features. Drivers that implement .get_features are
> > > responsible for reading the EEE abilities themselves.
> > >
> > > yt8521_get_features() does not do this, so phydev->supported_eee stays
> > > empty for YT8521/YT8531S and "ethtool --show-eee" reports "EEE status:
> > > not supported", even though the PHY has the standard EEE capability
> > > registers.
> > >
> > > Call genphy_c45_read_eee_abilities() at the end of
> > > yt8521_get_features() to populate supported_eee.
> > >
> > > Fixes: 70479a40954c ("net: phy: Add driver for Motorcomm yt8521
> > > gigabit ethernet phy")
> > > Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
> > > ---
> > >  drivers/net/phy/motorcomm.c | 3 +++
> > >  1 file changed, 3 insertions(+)
> > >
> > > diff --git a/drivers/net/phy/motorcomm.c
> > b/drivers/net/phy/motorcomm.c
> > > index b49897500a59..46efa3406841 100644
> > > --- a/drivers/net/phy/motorcomm.c
> > > +++ b/drivers/net/phy/motorcomm.c
> > > @@ -2439,6 +2439,9 @@ static int yt8521_get_features(struct phy_device
> > *phydev)
> > >  		/* add fiber's features to phydev->supported */
> > >  		yt8521_prepare_fiber_features(phydev, phydev->supported);
> > >  	}
> > > +
> > > +	genphy_c45_read_eee_abilities(phydev);
> > 
> > Don't you want to return error if genphy_c45_read_eee_abilities() fails?
> 
> EEE is an optional functionality, and the call in genphy_read_abilities() has the following comment. Therefore, I do not return its error here either.
> "
> 	/* This is optional functionality. If not supported, we may get an error
> 	 * which should be ignored.
> 	 */
> "

This conversation then raises the question, should this be a void
function?

	Andrew