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Date:   Wed, 27 May 2020 18:41:51 +0200
From:   Antoine Tenart <>
Subject: [PATCH net-next 1/8] net: phy: add support for a common probe between shared PHYs

Shared PHYs (PHYs in the same hardware package) may have shared
registers and their drivers would usually need to share information.
There is currently a way to have a shared (part of the) init, by using
phy_package_init_once(). This patch extends the logic to share parts of
the probe to allow sharing the initialization of locks or resources

Signed-off-by: Antoine Tenart <>
 include/linux/phy.h | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 8c05d0fb5c00..058219b6441f 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -244,7 +244,8 @@ struct phy_package_shared {
 /* used as bit number in atomic bitops */
  * The Bus class for PHYs.  Devices which provide access to
@@ -1554,14 +1555,25 @@ static inline int __phy_package_write(struct phy_device *phydev,
 	return __mdiobus_write(phydev->mdio.bus, shared->addr, regnum, val);
-static inline bool phy_package_init_once(struct phy_device *phydev)
+static inline bool __phy_package_set_once(struct phy_device *phydev,
+					  unsigned int b)
 	struct phy_package_shared *shared = phydev->shared;
 	if (!shared)
 		return false;
-	return !test_and_set_bit(PHY_SHARED_F_INIT_DONE, &shared->flags);
+	return !test_and_set_bit(b, &shared->flags);
+static inline bool phy_package_init_once(struct phy_device *phydev)
+	return __phy_package_set_once(phydev, PHY_SHARED_F_INIT_DONE);
+static inline bool phy_package_probe_once(struct phy_device *phydev)
+	return __phy_package_set_once(phydev, PHY_SHARED_F_PROBE_DONE);
 extern struct bus_type mdio_bus_type;

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