net: phylink: add phylink_speed_(up|down) interface

Add an interface for the phy_speed_(up|down) functions when a driver
makes use of phylink. These pass the call through to phylib when we
have a normal PHY attached (i.o.w., not a PHY on a SFP module.)

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 09f986e8944e..b7d549922ff9 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1845,6 +1845,54 @@ int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
 }
 EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
 
+/**
+ * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both
+ *   link partners
+ * @pl: a pointer to a &struct phylink returned from phylink_create()
+ * @sync: perform action synchronously
+ *
+ * If we have a PHY that is not part of a SFP module, then set the speed
+ * as described in the phy_speed_down() function. Please see this function
+ * for a description of the @sync parameter.
+ *
+ * Returns zero if there is no PHY, otherwise as per phy_speed_down().
+ */
+int phylink_speed_down(struct phylink *pl, bool sync)
+{
+	int ret = 0;
+
+	ASSERT_RTNL();
+
+	if (!pl->sfp_bus && pl->phydev)
+		ret = phy_speed_down(pl->phydev, sync);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_speed_down);
+
+/**
+ * phylink_speed_up() - restore the advertised speeds prior to the call to
+ *   phylink_speed_down()
+ * @pl: a pointer to a &struct phylink returned from phylink_create()
+ *
+ * If we have a PHY that is not part of a SFP module, then restore the
+ * PHY speeds as per phy_speed_up().
+ *
+ * Returns zero if there is no PHY, otherwise as per phy_speed_up().
+ */
+int phylink_speed_up(struct phylink *pl)
+{
+	int ret = 0;
+
+	ASSERT_RTNL();
+
+	if (!pl->sfp_bus && pl->phydev)
+		ret = phy_speed_up(pl->phydev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phylink_speed_up);
+
 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus)
 {
 	struct phylink *pl = upstream;