diff options
| -rw-r--r-- | drivers/net/phy/phy-core.c | 25 | ||||
| -rw-r--r-- | include/linux/phy.h | 28 |
2 files changed, 53 insertions, 0 deletions
diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c index 2c985c6e2cdd..028c098e9a00 100644 --- a/drivers/net/phy/phy-core.c +++ b/drivers/net/phy/phy-core.c @@ -323,3 +323,28 @@ int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val) 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); diff --git a/include/linux/phy.h b/include/linux/phy.h index a052e3768422..0c5a28520c65 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -718,6 +718,18 @@ static inline int phy_read(struct phy_device *phydev, u32 regnum) } /** + * __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 @@ -733,6 +745,22 @@ static inline int phy_write(struct phy_device *phydev, u32 regnum, u16 val) } /** + * __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 * |