diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2024-10-04 11:01:00 +0200 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-10-08 10:50:15 +0200 |
| commit | 20a4da20e0bd0297bf1ce083362e78b6702f991e (patch) | |
| tree | fa581e8377b86525827e8f10c22412a1c49a267d | |
| parent | 31a9ce20fa8de604d61c3c341532717cdaf297a0 (diff) | |
net: phy: Add support for PHY timing-role configuration via device tree
Introduce support for configuring the master/slave role of PHYs based on
the `timing-role` property in the device tree. While this functionality
is necessary for Single Pair Ethernet (SPE) PHYs (1000/100/10Base-T1)
where hardware strap pins may be unavailable or incorrectly set, it
works for any PHY type.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Divya Koppera <divya.koppera@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | drivers/net/phy/phy-core.c | 33 | ||||
| -rw-r--r-- | drivers/net/phy/phy_device.c | 3 | ||||
| -rw-r--r-- | include/linux/phy.h | 1 |
3 files changed, 37 insertions, 0 deletions
diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c index 1f98b6a96c15..4e8db12d6092 100644 --- a/drivers/net/phy/phy-core.c +++ b/drivers/net/phy/phy-core.c @@ -413,6 +413,39 @@ void of_set_phy_eee_broken(struct phy_device *phydev) } /** + * of_set_phy_timing_role - Set the master/slave mode of the PHY + * + * @phydev: The phy_device struct + * + * Set master/slave configuration of the PHY based on the device tree. + */ +void of_set_phy_timing_role(struct phy_device *phydev) +{ + struct device_node *node = phydev->mdio.dev.of_node; + const char *master; + + if (!IS_ENABLED(CONFIG_OF_MDIO)) + return; + + if (!node) + return; + + if (of_property_read_string(node, "timing-role", &master)) + return; + + if (strcmp(master, "forced-master") == 0) + phydev->master_slave_set = MASTER_SLAVE_CFG_MASTER_FORCE; + else if (strcmp(master, "forced-slave") == 0) + phydev->master_slave_set = MASTER_SLAVE_CFG_SLAVE_FORCE; + else if (strcmp(master, "preferred-master") == 0) + phydev->master_slave_set = MASTER_SLAVE_CFG_MASTER_PREFERRED; + else if (strcmp(master, "preferred-slave") == 0) + phydev->master_slave_set = MASTER_SLAVE_CFG_SLAVE_PREFERRED; + else + phydev_warn(phydev, "Unknown master-slave mode %s\n", master); +} + +/** * phy_resolve_aneg_pause - Determine pause autoneg results * * @phydev: The phy_device struct diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 560e338b307a..4ccf504a8b2c 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -3608,6 +3608,9 @@ static int phy_probe(struct device *dev) */ of_set_phy_eee_broken(phydev); + /* Get master/slave strap overrides */ + of_set_phy_timing_role(phydev); + /* The Pause Frame bits indicate that the PHY can support passing * pause frames. During autonegotiation, the PHYs will determine if * they should allow pause frames to pass. The MAC driver should then diff --git a/include/linux/phy.h b/include/linux/phy.h index a98bc91a0cde..ff762a3d8270 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -1260,6 +1260,7 @@ size_t phy_speeds(unsigned int *speeds, size_t size, unsigned long *mask); void of_set_phy_supported(struct phy_device *phydev); void of_set_phy_eee_broken(struct phy_device *phydev); +void of_set_phy_timing_role(struct phy_device *phydev); int phy_speed_down_core(struct phy_device *phydev); /** |