From: Michael Sit Wei Hong michael.wei.hong.sit@intel.com
[ Upstream commit 653a180957a85c3fc30320cc7e84f5dc913a64f8 ]
Provide phylink_expects_phy() to allow MAC drivers to check if it is expecting a PHY to attach to. Since fixed-linked setups do not need to attach to a PHY.
Provides a boolean value as to if the MAC should expect a PHY. Returns true if a PHY is expected.
Reviewed-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Signed-off-by: Michael Sit Wei Hong michael.wei.hong.sit@intel.com Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: fe2cfbc96803 ("net: stmmac: check if MAC needs to attach to a PHY") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/phylink.c | 19 +++++++++++++++++++ include/linux/phylink.h | 1 + 2 files changed, 20 insertions(+)
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 4d2519cdb8012..bf8a8ed5d5d7b 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -1571,6 +1571,25 @@ void phylink_destroy(struct phylink *pl) } EXPORT_SYMBOL_GPL(phylink_destroy);
+/** + * phylink_expects_phy() - Determine if phylink expects a phy to be attached + * @pl: a pointer to a &struct phylink returned from phylink_create() + * + * When using fixed-link mode, or in-band mode with 1000base-X or 2500base-X, + * no PHY is needed. + * + * Returns true if phylink will be expecting a PHY. + */ +bool phylink_expects_phy(struct phylink *pl) +{ + if (pl->cfg_link_an_mode == MLO_AN_FIXED || + (pl->cfg_link_an_mode == MLO_AN_INBAND && + phy_interface_mode_is_8023z(pl->link_config.interface))) + return false; + return true; +} +EXPORT_SYMBOL_GPL(phylink_expects_phy); + static void phylink_phy_change(struct phy_device *phydev, bool up) { struct phylink *pl = phydev->phylink; diff --git a/include/linux/phylink.h b/include/linux/phylink.h index c492c26202b5b..637698ed5cb6c 100644 --- a/include/linux/phylink.h +++ b/include/linux/phylink.h @@ -574,6 +574,7 @@ struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *, phy_interface_t iface, const struct phylink_mac_ops *mac_ops); void phylink_destroy(struct phylink *); +bool phylink_expects_phy(struct phylink *pl);
int phylink_connect_phy(struct phylink *, struct phy_device *); int phylink_of_phy_connect(struct phylink *, struct device_node *, u32 flags);