github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 07:03:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

net: phy: Add support for PHY timing-role configuration via device tree

Browse Source 
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>
This commit is contained in:
Oleksij Rempel 2024-10-04 11:01:00 +02:00 committed by Paolo Abeni
parent 31a9ce20fa
commit 20a4da20e0
3 changed files with 37 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/net/phy/phy-core.c
View File

@ -412,6 +412,39 @@ void of_set_phy_eee_broken(struct phy_device *phydev)
phydev->eee_broken_modes = broken;
}
/**
* 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
*

3
drivers/net/phy/phy_device.c
View File

@ -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

1
include/linux/phy.h
View File

@ -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);
/**