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net: phy: c45: add and use genphy_c45_read_eee_cap2

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Add and use genphy_c45_read_eee_cap2(), complementing
genphy_c45_read_eee_cap1().

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2024-02-14 21:18:02 +01:00 committed by David S. Miller
parent ef6ee3a31b
commit b63584c86e
1 changed files with 31 additions and 0 deletions
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31
drivers/net/phy/phy-c45.c
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@ -830,6 +830,30 @@ static int genphy_c45_read_eee_cap1(struct phy_device *phydev)
return 0;
}
/**
* genphy_c45_read_eee_cap2 - read supported EEE link modes from register 3.21
* @phydev: target phy_device struct
*/
static int genphy_c45_read_eee_cap2(struct phy_device *phydev)
{
int val;
/* IEEE 802.3-2022 45.2.3.11 EEE control and capability 2
* (Register 3.21)
*/
val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE2);
if (val < 0)
return val;
/* IEEE 802.3-2022 45.2.3.11 says 9 bits are reserved. */
if (val == 0xffff)
return 0;
mii_eee_cap2_mod_linkmode_sup_t(phydev->supported_eee, val);
return 0;
}
/**
* genphy_c45_read_eee_abilities - read supported EEE link modes
* @phydev: target phy_device struct
@ -848,6 +872,13 @@ int genphy_c45_read_eee_abilities(struct phy_device *phydev)
return val;
}
/* Same for cap2 (3.21) */
if (linkmode_intersects(phydev->supported, PHY_EEE_CAP2_FEATURES)) {
val = genphy_c45_read_eee_cap2(phydev);
if (val)
return val;
}
if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
phydev->supported)) {
/* IEEE 802.3cg-2019 45.2.1.186b 10BASE-T1L PMA status register