diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2024-12-03 15:31:02 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-12-04 19:19:06 -0800 |
| commit | b4c7698dd95f253c6958d8c6ac219098009bf28a (patch) | |
| tree | 95585168f1e5c7c348097ecbb5d3980952102ac8 /drivers/net/phy/phy.c | |
| parent | 4e7d000286fe8e12f2d88032711ffab3ab658b12 (diff) | |
net: phy: add phy_inband_caps()
Add a method to query the PHY's in-band capabilities for a PHY
interface mode.
Where the interface mode does not have in-band capability, or the PHY
driver has not been updated to return this information, then
phy_inband_caps() should return zero. Otherwise, PHY drivers will
return a value consisting of the following flags:
LINK_INBAND_DISABLE indicates that the hardware does not support
in-band signalling, or can have in-band signalling configured via
software to be disabled.
LINK_INBAND_ENABLE indicates that the hardware will use in-band
signalling, or can have in-band signalling configured via software
to be enabled.
LINK_INBAND_BYPASS indicates that the hardware has the ability to
bypass in-band signalling when enabled after a timeout if the link
partner does not respond to its in-band signalling.
This reports the PHY capabilities for the particular interface mode,
not the current configuration.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1tIUre-006ITz-KF@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/phy/phy.c')
| -rw-r--r-- | drivers/net/phy/phy.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 0d20b534122b..f42cd6584841 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1006,6 +1006,27 @@ static int phy_check_link_status(struct phy_device *phydev) } /** + * phy_inband_caps - query which in-band signalling modes are supported + * @phydev: a pointer to a &struct phy_device + * @interface: the interface mode for the PHY + * + * Returns zero if it is unknown what in-band signalling is supported by the + * PHY (e.g. because the PHY driver doesn't implement the method.) Otherwise, + * returns a bit mask of the LINK_INBAND_* values from + * &enum link_inband_signalling to describe which inband modes are supported + * by the PHY for this interface mode. + */ +unsigned int phy_inband_caps(struct phy_device *phydev, + phy_interface_t interface) +{ + if (phydev->drv && phydev->drv->inband_caps) + return phydev->drv->inband_caps(phydev, interface); + + return 0; +} +EXPORT_SYMBOL_GPL(phy_inband_caps); + +/** * _phy_start_aneg - start auto-negotiation for this PHY device * @phydev: the phy_device struct * |