Initial commit

target/linux/brcm2708/patches-4.14/950-0294-net-phy-add-unlocked-accessors.patch

@@ -0,0 +1,97 @@
+From 6709752e7233afd929a130ac4f3645348be94c1f Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Tue, 2 Jan 2018 10:58:37 +0000
+Subject: [PATCH 294/454] net: phy: add unlocked accessors
+
+commit 788f9933db6172801336d0ae2dec5bdc7525389f upstream.
+
+Add unlocked versions of the bus accessors, which allows access to the
+bus with all the tracing. These accessors validate that the bus mutex
+is held, which is a basic requirement for all mii bus accesses.
+
+Also added is a read-modify-write unlocked accessor with the same
+locking requirements.
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+Reviewed-by: Andrew Lunn <andrew@lunn.ch>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/phy/phy-core.c | 25 +++++++++++++++++++++++++
+ include/linux/phy.h        | 28 ++++++++++++++++++++++++++++
+ 2 files changed, 53 insertions(+)
+
+--- a/drivers/net/phy/phy-core.c
++++ b/drivers/net/phy/phy-core.c
+@@ -280,3 +280,28 @@ int phy_write_mmd(struct phy_device *phy
+ 	return ret;
+ }
+ EXPORT_SYMBOL(phy_write_mmd);
++
++/**
++ * __phy_modify() - Convenience function for modifying a PHY register
++ * @phydev: a pointer to a &struct phy_device
++ * @regnum: register number
++ * @mask: bit mask of bits to clear
++ * @set: bit mask of bits to set
++ *
++ * Unlocked helper function which allows a PHY register to be modified as
++ * new register value = (old register value & mask) | set
++ */
++int __phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
++{
++	int ret, res;
++
++	ret = __phy_read(phydev, regnum);
++	if (ret >= 0) {
++		res = __phy_write(phydev, regnum, (ret & ~mask) | set);
++		if (res < 0)
++			ret = res;
++	}
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(__phy_modify);
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -728,6 +728,18 @@ static inline int phy_read(struct phy_de
+ }
+ 
+ /**
++ * __phy_read - convenience function for reading a given PHY register
++ * @phydev: the phy_device struct
++ * @regnum: register number to read
++ *
++ * The caller must have taken the MDIO bus lock.
++ */
++static inline int __phy_read(struct phy_device *phydev, u32 regnum)
++{
++	return __mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, regnum);
++}
++
++/**
+  * phy_write - Convenience function for writing a given PHY register
+  * @phydev: the phy_device struct
+  * @regnum: register number to write
+@@ -743,6 +755,22 @@ static inline int phy_write(struct phy_d
+ }
+ 
+ /**
++ * __phy_write - Convenience function for writing a given PHY register
++ * @phydev: the phy_device struct
++ * @regnum: register number to write
++ * @val: value to write to @regnum
++ *
++ * The caller must have taken the MDIO bus lock.
++ */
++static inline int __phy_write(struct phy_device *phydev, u32 regnum, u16 val)
++{
++	return __mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, regnum,
++			       val);
++}
++
++int __phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set);
++
++/**
+  * phy_interrupt_is_valid - Convenience function for testing a given PHY irq
+  * @phydev: the phy_device struct
+  *