drivers/net/phy/phy.c | 21 +++++++++++++++++++++
 include/linux/phy.h   | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 8d3ee3a6495b..cf4a8b055a42 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c

@@ -114,6 +114,27 @@ void phy_print_status(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(phy_print_status);
 
+/**
+ * phy_get_rate_adaptation - determine if rate adaptation is supported
+ * @phydev: The phy device to return rate adaptation for
+ * @iface: The interface mode to use
+ *
+ * This determines the type of rate adaptation (if any) that @phy supports
+ * using @iface. @iface may be %PHY_INTERFACE_MODE_NA to determine if any
+ * interface supports rate adaptation.
+ *
+ * Return: The type of rate adaptation @phy supports for @iface, or
+ *         %RATE_ADAPT_NONE.
+ */
+enum rate_adaptation phy_get_rate_adaptation(struct phy_device *phydev,
+					     phy_interface_t iface)
+{
+	if (phydev->drv->get_rate_adaptation)
+		return phydev->drv->get_rate_adaptation(phydev, iface);

 #define PHY_INIT_TIMEOUT	100000
 #define PHY_FORCE_TIMEOUT	10

@@ -570,6 +588,7 @@ struct macsec_ops;
  * @lp_advertising: Current link partner advertised linkmodes
  * @eee_broken_modes: Energy efficient ethernet modes which should be prohibited
  * @autoneg: Flag autoneg being used
+ * @rate_adaptation: Current rate adaptation mode
  * @link: Current link state
  * @autoneg_complete: Flag auto negotiation of the link has completed
  * @mdix: Current crossover

@@ -637,6 +656,8 @@ struct phy_device {
 	unsigned irq_suspended:1;
 	unsigned irq_rerun:1;
 
+	enum rate_adaptation rate_adaptation;