Re: [PATCH v3 07/13] net: phy: add qca8081 get_features

Andrew Lunn
2021-10-20T12:20:34Z

On Wed, Oct 20, 2021 at 02:39:57PM +0800, Jie Luo wrote:
>
> On 10/19/2021 5:44 AM, Andrew Lunn wrote:
> > On Mon, Oct 18, 2021 at 11:33:27AM +0800, Luo Jie wrote:
> > > Reuse the at803x phy driver get_features excepting
> > > adding 2500M capability.
> > >
> > > Signed-off-by: Luo Jie<luoj@codeaurora.org>
> > > ---
> > > drivers/net/phy/at803x.c | 10 ++++++++++
> > > 1 file changed, 10 insertions(+)
> > >
> > > diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
> > > index 42d3f8ccca94..0c22ef735230 100644
> > > --- a/drivers/net/phy/at803x.c
> > > +++ b/drivers/net/phy/at803x.c
> > > @@ -719,6 +719,15 @@ static int at803x_get_features(struct phy_device *phydev)
> > > if (err)
> > > return err;
> > > + if (phydev->drv->phy_id == QCA8081_PHY_ID) {
> > > + err = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_NG_EXTABLE);
> > > + if (err < 0)
> > > + return err;
> > > +
> > > + linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->supported,
> > > + err & MDIO_PMA_NG_EXTABLE_2_5GBT);
> > > + }
> > genphy_c45_pma_read_abilities()?
> >
> > Andrew
>
> Hi Andrew,
>
> Thanks for this comment, if we use genphy_c45_pma_read_abilities here, the
> ETHTOOL_LINK_MODE_Autoneg_BIT
>
> will be lost, since MDIO_MMD_AN.MDIO_STAT1 does not have bit
> MDIO_AN_STAT1_ABLE.

Yes, if your PHY breaks the standard, the helpers are not much use,
that assume standard compliment PHYs.

Andrew