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net: phylink: add interface to configure clause 22 PCS PHY

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Add an interface to configure the advertisement for a clause 22 PCS
PHY, and set the AN enable flag in the BMCR appropriately.

Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2020-07-21 12:04:51 +01:00 committed by David S. Miller
parent 7137e18f6f
commit 93eaceb0fc
2 changed files with 40 additions and 0 deletions
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37
drivers/net/phy/phylink.c
View File

@ -2442,6 +2442,43 @@ int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement);
/**
* phylink_mii_c22_pcs_config() - configure clause 22 PCS
* @pcs: a pointer to a &struct mdio_device.
* @mode: link autonegotiation mode
* @interface: the PHY interface mode being configured
* @advertising: the ethtool advertisement mask
*
* Configure a Clause 22 PCS PHY with the appropriate negotiation
* parameters for the @mode, @interface and @advertising parameters.
* Returns negative error number on failure, zero if the advertisement
* has not changed, or positive if there is a change.
*/
int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
phy_interface_t interface,
const unsigned long *advertising)
{
bool changed;
u16 bmcr;
int ret;
ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface,
advertising);
if (ret < 0)
return ret;
changed = ret > 0;
bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0;
ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR,
BMCR_ANENABLE, bmcr);
if (ret < 0)
return ret;
return changed ? 1 : 0;
}
EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config);
/**
* phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation
* @pcs: a pointer to a &struct mdio_device.

3
include/linux/phylink.h
View File

@ -478,6 +478,9 @@ void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
phy_interface_t interface,
const unsigned long *advertising);
int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
phy_interface_t interface,
const unsigned long *advertising);
void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs);
void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,