netdev - [PATCH net-next 07/15] net: mdio: add unlocked mdiobus and mdiodev bus accessors

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Date:   Mon, 13 Jun 2022 14:00:56 +0100
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Marek Behún <kabel@...nel.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Paolo Abeni <pabeni@...hat.com>,
        Robert Hancock <robert.hancock@...ian.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>
Subject: [PATCH net-next 07/15] net: mdio: add unlocked mdiobus and mdiodev
 bus accessors

Add the following unlocked accessors to complete the set:
__mdiobus_modify()
__mdiodev_read()
__mdiodev_write()
__mdiodev_modify()
__mdiodev_modify_changed()
which we will need for Marvell DSA PCS conversion.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/phy/mdio_bus.c | 24 ++++++++++++++++++++++--
 include/linux/mdio.h       | 26 ++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 5224ff0ac0db..f8c56e0b7a9d 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -922,6 +922,26 @@ int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
 }
 EXPORT_SYMBOL(mdiobus_write);
 
+/**
+ * __mdiobus_modify - Convenience function for modifying a given mdio device
+ *	register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @regnum: register number to write
+ * @mask: bit mask of bits to clear
+ * @set: bit mask of bits to set
+ */
+int __mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
+		     u16 set)
+{
+	int err;
+
+	err = __mdiobus_modify_changed(bus, addr, regnum, mask, set);
+
+	return err < 0 ? err : 0;
+}
+EXPORT_SYMBOL_GPL(__mdiobus_modify);
+
 /**
  * mdiobus_modify - Convenience function for modifying a given mdio device
  *	register
@@ -936,10 +956,10 @@ int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask, u16 set)
 	int err;
 
 	mutex_lock(&bus->mdio_lock);
-	err = __mdiobus_modify_changed(bus, addr, regnum, mask, set);
+	err = __mdiobus_modify(bus, addr, regnum, mask, set);
 	mutex_unlock(&bus->mdio_lock);
 
-	return err < 0 ? err : 0;
+	return err;
 }
 EXPORT_SYMBOL_GPL(mdiobus_modify);
 
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 0f91ea11777a..9a3a9cded388 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -414,6 +414,8 @@ static inline u32 linkmode_adv_to_mii_t1_adv_m_t(unsigned long *advertising)
 
 int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
 int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
+int __mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
+		     u16 set);
 int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 			     u16 mask, u16 set);
 
@@ -426,6 +428,30 @@ int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
 int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 			   u16 mask, u16 set);
 
+static inline int __mdiodev_read(struct mdio_device *mdiodev, u32 regnum)
+{
+	return __mdiobus_read(mdiodev->bus, mdiodev->addr, regnum);
+}
+
+static inline int __mdiodev_write(struct mdio_device *mdiodev, u32 regnum,
+				  u16 val)
+{
+	return __mdiobus_write(mdiodev->bus, mdiodev->addr, regnum, val);
+}
+
+static inline int __mdiodev_modify(struct mdio_device *mdiodev, u32 regnum,
+				   u16 mask, u16 set)
+{
+	return __mdiobus_modify(mdiodev->bus, mdiodev->addr, regnum, mask, set);
+}
+
+static inline int __mdiodev_modify_changed(struct mdio_device *mdiodev,
+					   u32 regnum, u16 mask, u16 set)
+{
+	return __mdiobus_modify_changed(mdiodev->bus, mdiodev->addr, regnum,
+					mask, set);
+}
+
 static inline int mdiodev_read(struct mdio_device *mdiodev, u32 regnum)
 {
 	return mdiobus_read(mdiodev->bus, mdiodev->addr, regnum);
-- 
2.30.2