On 10/19/2021 5:44 AM, Andrew Lunn wrote:

On Mon, Oct 18, 2021 at 11:33:27AM +0800, Luo Jie wrote:

quoted

Reuse the at803x phy driver get_features excepting
adding 2500M capability.

Signed-off-by: Luo Jie<redacted>
---
  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.