diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0294-net-phy-add-unlocked-accessors.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0294-net-phy-add-unlocked-accessors.patch | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0294-net-phy-add-unlocked-accessors.patch b/target/linux/brcm2708/patches-4.14/950-0294-net-phy-add-unlocked-accessors.patch new file mode 100644 index 0000000000..f0b916e86c --- /dev/null +++ b/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 +@@ -726,6 +726,18 @@ 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 +@@ -741,6 +753,22 @@ 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 + * |