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net: lan743x: add fixed phy support for LAN7431 device

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Add fixed_phy support at 1Gbps full duplex for the lan7431 device
if a phy not found over MDIO. Tested with a MAC to MAC connection
from LAN7431 to a KSZ9893 switch. This avoids the Driver open error
in LAN743x. TX delay and internal CLK125 generation is already
enabled in EEPROM.

Signed-off-by: Pavithra Sathyanarayanan <Pavithra.Sathyanarayanan@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Pavithra Sathyanarayanan 2023-01-17 19:46:14 +05:30 • committed by Paolo Abeni
parent e86c721090
commit 624864fbff
1 changed files with 18 additions and 2 deletions
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20
drivers/net/ethernet/microchip/lan743x_main.c
View file

@ -1491,6 +1491,11 @@ static int lan743x_phy_open(struct lan743x_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
struct lan743x_phy *phy = &adapter->phy;
struct fixed_phy_status fphy_status = {
.link = 1,
.speed = SPEED_1000,
.duplex = DUPLEX_FULL,
};
struct phy_device *phydev;
int ret = -EIO;
@ -1501,8 +1506,19 @@ static int lan743x_phy_open(struct lan743x_adapter *adapter)
if (!phydev) {
/* try internal phy */
phydev = phy_find_first(adapter->mdiobus);
if (!phydev)
goto return_error;
if (!phydev) {
if ((adapter->csr.id_rev & ID_REV_ID_MASK_) ==
ID_REV_ID_LAN7431_) {
phydev = fixed_phy_register(PHY_POLL,
&fphy_status, NULL);
if (IS_ERR(phydev)) {
netdev_err(netdev, "No PHY/fixed_PHY found\n");
return -EIO;
}
} else {
goto return_error;
}
}
lan743x_phy_interface_select(adapter);