From 79365f36d1de87286bb4fc0abcb2a01678ef4bef Mon Sep 17 00:00:00 2001 From: "Russell King (Oracle)" Date: Wed, 6 Oct 2021 13:19:20 +0100 Subject: net: mdio: add mdiobus_modify_changed() Add mdiobus_modify_changed() helper to reflect the phylib and similar equivalents. This will avoid this functionality being open-coded, as has already happened in phylink, and it looks like other users will be appearing soon. Reviewed-by: Andrew Lunn Signed-off-by: Russell King (Oracle) Signed-off-by: Jakub Kicinski --- drivers/net/phy/mdio_bus.c | 22 ++++++++++++++++++++++ include/linux/mdio.h | 2 ++ 2 files changed, 24 insertions(+) diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 6f4b4e5df639..d8b68145f6b4 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -926,6 +926,28 @@ int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask, u16 set) } EXPORT_SYMBOL_GPL(mdiobus_modify); +/** + * mdiobus_modify_changed - Convenience function for modifying a given mdio + * device register and returning if it changed + * @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_changed(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); + mutex_unlock(&bus->mdio_lock); + + return err; +} +EXPORT_SYMBOL_GPL(mdiobus_modify_changed); + /** * mdio_bus_match - determine if given MDIO driver supports the given * MDIO device diff --git a/include/linux/mdio.h b/include/linux/mdio.h index 5e6dc38f418e..f622888a4ba8 100644 --- a/include/linux/mdio.h +++ b/include/linux/mdio.h @@ -349,6 +349,8 @@ int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val); int mdiobus_write_nested(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); static inline u32 mdiobus_c45_addr(int devad, u16 regnum) { -- cgit v1.2.3-59-g8ed1b