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

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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: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <linux@armlinux.org.uk>
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2024-09-06 16:05:07 +05:30 committed by David S. Miller
parent f3b6129b7d
commit 4b3fc475c6
2 changed files with 44 additions and 0 deletions
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42
drivers/net/phy/phylink.c
View File

@ -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

2
include/linux/phylink.h
View File

@ -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);