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Subject[PATCH net-next 3/3] net: lan743x: add fixed phy support for LAN7431 device
Date
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>
---
drivers/net/ethernet/microchip/lan743x_main.c | 20 +++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index fe3026ed6f03..b5add1c5fa06 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -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);

--
2.25.1
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