phylink_get_fixed_state() currently consults an optional "link_gpio" GPIO descriptor, expand this mechanism to allow specifying a custom callback. This is necessary to support out of band link notifcation (e.g: from an interrupt within a MMIO register).
Signed-off-by: Florian Fainelli <f.faine...@gmail.com> --- drivers/net/phy/phylink.c | 26 ++++++++++++++++++++++++-- include/linux/phylink.h | 3 +++ 2 files changed, 27 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index a41f0a224512..0a8fd9aa1a19 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -50,6 +50,8 @@ struct phylink { /* The link configuration settings */ struct phylink_link_state link_config; struct gpio_desc *link_gpio; + void (*get_fixed_state)(struct net_device *dev, + struct phylink_link_state *s); struct mutex state_mutex; struct phylink_link_state phy_state; @@ -339,12 +341,14 @@ static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state * } /* The fixed state is... fixed except for the link state, - * which may be determined by a GPIO. + * which may be determined by a GPIO or a callback. */ static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state) { *state = pl->link_config; - if (pl->link_gpio) + if (pl->get_fixed_state) + pl->get_fixed_state(pl->netdev, state); + else if (pl->link_gpio) state->link = !!gpiod_get_value(pl->link_gpio); } @@ -737,6 +741,24 @@ void phylink_disconnect_phy(struct phylink *pl) } EXPORT_SYMBOL_GPL(phylink_disconnect_phy); +int phylink_fixed_state_cb(struct phylink *pl, + void (*cb)(struct net_device *dev, + struct phylink_link_state *state)) +{ + /* It does not make sense to let the link be overriden unless we use + * MLO_AN_FIXED + */ + if (pl->link_an_mode != MLO_AN_FIXED) + return -EINVAL; + + mutex_lock(&pl->state_mutex); + pl->get_fixed_state = cb; + mutex_unlock(&pl->state_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(phylink_fixed_state_cb); + void phylink_mac_change(struct phylink *pl, bool up) { if (!up) diff --git a/include/linux/phylink.h b/include/linux/phylink.h index 875717a4e873..d505ea321eb5 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -107,6 +107,9 @@ void phylink_destroy(struct phylink *); int phylink_connect_phy(struct phylink *, struct phy_device *); int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags); void phylink_disconnect_phy(struct phylink *); +int phylink_fixed_state_cb(struct phylink *, + void (*cb)(struct net_device *dev, + struct phylink_link_state *)); void phylink_mac_change(struct phylink *, bool up); -- 2.14.3