Commit 4b3fc475 authored by Russell King's avatar Russell King Committed by David S. Miller
Browse files

net: phylink: Add phylink_set_fixed_link() to configure fixed link state in phylink 



The function allows for the configuration of a fixed link state for a given
phylink instance. This addition is particularly useful for network devices that
operate with a fixed link configuration, where the link parameters do not change
dynamically. By using `phylink_set_fixed_link()`, drivers can easily set up
the fixed link state during initialization or configuration changes.

Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarRussell King <linux@armlinux.org.uk>
Signed-off-by: default avatarRaju Lakkaraju <Raju.Lakkaraju@microchip.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f3b6129b

drivers/net/phy/phylink.c

+42 −0
Original line number Diff line number Diff line
@@ -1635,6 +1635,48 @@ static int phylink_register_sfp(struct phylink *pl, 
	return ret;

}



/**

 * phylink_set_fixed_link() - set the fixed link

 * @pl: a pointer to a &struct phylink returned from phylink_create()

 * @state: a pointer to a struct phylink_link_state.

 *

 * This function is used when the link parameters are known and do not change,

 * making it suitable for certain types of network connections.

 *

 * Returns: zero on success or negative error code.

 */

int phylink_set_fixed_link(struct phylink *pl,

			   const struct phylink_link_state *state)

{

	const struct phy_setting *s;

	unsigned long *adv;



	if (pl->cfg_link_an_mode != MLO_AN_PHY || !state ||

	    !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state))

		return -EINVAL;



	s = phy_lookup_setting(state->speed, state->duplex,

			       pl->supported, true);

	if (!s)

		return -EINVAL;



	adv = pl->link_config.advertising;

	linkmode_zero(adv);

	linkmode_set_bit(s->bit, adv);

	linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv);



	pl->link_config.speed = state->speed;

	pl->link_config.duplex = state->duplex;

	pl->link_config.link = 1;

	pl->link_config.an_complete = 1;



	pl->cfg_link_an_mode = MLO_AN_FIXED;

	pl->cur_link_an_mode = pl->cfg_link_an_mode;



	return 0;

}

EXPORT_SYMBOL_GPL(phylink_set_fixed_link);



/**

 * phylink_create() - create a phylink instance

 * @config: a pointer to the target &struct phylink_config

include/linux/phylink.h

+2 −0
Original line number Diff line number Diff line
@@ -598,6 +598,8 @@ int phylink_fwnode_phy_connect(struct phylink *pl, 
			       const struct fwnode_handle *fwnode,

			       u32 flags);

void phylink_disconnect_phy(struct phylink *);

int phylink_set_fixed_link(struct phylink *,

			   const struct phylink_link_state *);



void phylink_mac_change(struct phylink *, bool up);

void phylink_pcs_change(struct phylink_pcs *, bool up);