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net: phy: nxp-c45-tja11xx: read PHY the speed from hardware

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Read PHY speed from hardware instead of assuming 100Mbps by default.
The TJA1103 works only at 100Mbps, but the driver will support more PHYs.

Signed-off-by: "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@oss.nxp.com>
This commit is contained in:
Radu Pirea (NXP OSS)
2024-02-08 10:41:23 +08:00
committed by Peng Fan
parent 6c43208a6d
commit 84e57e7dfb
1 changed files with 21 additions and 1 deletions
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drivers/net/phy/nxp-c45-tja11xx.c
+21 -1
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@@ -306,13 +306,33 @@ static int nxp_c45_config(struct phy_device *phydev)
return nxp_c45_start_op(phydev);
}
static int nxp_c45_speed(struct phy_device *phydev)
{
int val;
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
if (val < 0)
return val;
if (val & MDIO_PMA_CTRL1_SPEED100)
phydev->speed = SPEED_100;
else
phydev->speed = 0;
return 0;
}
static int nxp_c45_startup(struct phy_device *phydev)
{
u32 reg;
int ret;
reg = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT1);
phydev->link = !!(reg & MDIO_STAT1_LSTATUS);
phydev->speed = SPEED_100;
ret = nxp_c45_speed(phydev);
if (ret < 0)
return ret;
phydev->duplex = DUPLEX_FULL;
return 0;
}